Artigos de Revista
Info
Dynamics of CO2, CH4, and N2O in Ria Formosa coastal lagoon (southwestern Iberia) and export to the Gulf of Cadiz
A first characterization of greenhouse gases had been carried out to study their role and impact in a productive transitional coastal system of the southern Portugal
Ano: 2024
Número Páginas:
17p..
Autor(es): Cravo, A.; Rodrigues, M.; Forja, J.; Ortega, T.; Correia, C.; Sierra, A.
Revista: Science of the Total Environment
Editor: Elsevier
Volume:
(906)167094.
Keywords: Coastal lagoon; Ria Formosa; Gas mass transport; Water - atmosphere fluxes; Greenhouse gases
Info
Global and local geometrical imperfections of pultruded GFRP profiles based on a modal approach
ABSTRACT - The ultimate capacity of pultruded glass fibre reinforced polymer (pGFRP) profiles depends significantly on geometrical imperfections (GIs), given their sensitivity to buckling phenomena arising from both thin walls and low elastic moduli. However, GIs are not yet comprehensively addressed in design guidance. This paper proposes a new approach to characterize the initial GIs of pGFRP profiles based on a modal approach. Given the lack of comprehensive knowledge in this area, this study presents a highly accurate and robust methodology to measure GIs and dimensional deviations (DDs) in pGFRP profiles using a 3D contact coordinate measurement machine (CMM). The modal approach encompasses the measurement of dimensional parameters and a point cloud transformation that enables the assessment of GIs associated with pure buckling modes of pGFRP profiles. This procedure allows the quantification of three types of global GIs associated to (i) minor-axis (weak axis), (ii) major-axis (strong axis) bending, and (iii) twist. Additionally, the procedure also includes the assessment of local GIs, considering the wall (plate-like) imperfections. The separation of GIs into these four types (shape and amplitude) is of major relevance as its paves the way to the development of analytical design formulas for the strength prediction of pGFRP members. The approach described in this paper also serves two important purposes: (i) the statistical analysis of DDs and GIs of pGFRP members, and (ii) the identification of distinct shapes and amplitudes of GIs that form the basis for reliable design considerations of pGFRP members.
Ano: 2024
Número Páginas:
18p..
Autor(es): Silvestre, N.; Correia, J.; Pinheiro, A.; Ribeiro, A.; Lages Martins, L.; Lazzari, J.
Revista: Construction and Building Materials
Editor: ELSEVIER
Volume:
412 (2024) 134813.
Keywords: Modal decomposition; Geometrical imperfections; Dimensional deviation; 3D contact measurements; Pultruded profiles; Glass fibre reinforced polymer (GFRP)
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Número Páginas:
26p..
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: Buildings
Editor: MDPI
Volume:
13.
Keywords: Compatibility; 20th century; Portland cement; Lime
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: buildings
Editor: MDPI
Volume:
13.
Keywords: compatibility; 20th century; Portland cement; lime
Info
2DH modelling and mapping of surfbeat-driven flooding in the shadow of a jettied tidal inlet
Near estuaries and harbours, submerged shoals and defence structures impact the exposure to overtopping. These features may be accounted for in two-dimensional horizontal (2DH) numerical models, either based on phase resolving or phase-average solvers for wave propagation. In between, surfbeat solvers, such as in XBeach, combine an affordable computational cost with the ability to generate and propagate the longer infragravity (IG) waves. However, surfzone wave characteristics and the overtopping exposure modelled with XBeach are sensi tive to settings such as the shape of the forcing wave spectra and the numerical scheme for wave propagation. The present paper explores this sensitivity and assesses the performance of different inundation models built with the 2DH surfbeat solver of XBeach. These models were forced with downscaled water levels and directional wave spectra and the results fuelled a discussion bounded by data collected downdrift of the entrance to the harbour of Figueira da Foz (Portugal). The original second-order upwind scheme, which propagates short-waves with a lower numerical diffusion improved the model performance in terms of long-wave height, and an unconventional breaking criterion better represented the cross-shore distribution of short-wave height near the shore. A cali brated model was validated through the hindcast of an overtopping event observed under moderate swell forcing, and was used to map the overtopping exposure during a hypothetical combination of an energetic swell with a water level having a return period of ~70 years. Compared to the default wave spectra shape and model settings, using an appropriate representation of the short-wave directional spectrum at the open boundary was necessary to reproduce the observed overtopping extent. Refining the cross-shore resolution of the model helped to better represent the observed inundation extents, as also did the reduction of the friction coefficient. Addi tional phase-resolving simulations in 1DH overestimated IG wave energy and produced higher and more frequent overtopping discharges. The differences with the calibrated 2DH surfbeat model increased with the proximity of the inlet and with short-wave height and angle of incidence. Overall, required calibration steps were provided. They aim at making 2DH XBeach surfbeat a credible tool for 1) predicting short and IG wave characteristics up to the shoreline, as well as for 2) providing first estimates of exposure to overtopping in areas with shallow and alongshore-irregular morphologies.
Ano: 2023
Número Páginas:
1-21pp.
Autor(es): Freire, P.; Baptista, P.; Silva, P. A.; Henriques, M.; Azevedo, A.; Oliveira , F.; Fortunato, A. B.; Nahon, A.
Revista: Coastal Engineering
Editor: Elsevier B.V.
Volume:
184.
Keywords: XBeach; Infragravity waves; Ebb-tidal delta; Intermediate beach; Overtopping
Info
A ciência é do povo? Citizen science, reflexões sobre o conceito e os processos científicos da produção da verdade num mundo cada vez mais inseguro
À medida que as ameaças ambientais se multiplicam à escala global exige-se uma mais apurada reflexividade sobre as práticas humanas, as formas de utilização dos territórios e seus recursos e a capacidade de previsão e resposta quanto a eventos ambientais extremos, socialmente disruptivos. Ora, é esta capacidade de previsão que a ciência experimenta em uma dimensão cada vez menos segura, entrando em crise os modelos causais e a pertinência do conhecimento empírico baseado em observações do passado, pois o futuro torna-se progressivamente mais incerto e ameaçador. Incerteza e ameaça que se antecipam em cada crise, sob a manifestação dos riscos ambientais [1]. Algumas destas manifestações tornam-se indetetáveis para os sentidos humanos, a não ser pela própria visibilidade das consequências. As comunidades humanas encontram-se, assim, cada vez mais dependentes da análise e do discurso da ciência para perceberem (mesmo que na impossibilidade de compreenderem com exatidão os mecanismos de exposição) os riscos a que estão expostas. A humanidade parece, pois, acossada numa estrutura medieval do medo, o medo do invisível, na emergência de um novo tipo de sociedade colonizada pelo medo e que dá lugar a todas as derivas políticas [2]....
Ano: 2023
Autor(es): Craveiro, J.
Revista: Plataforma Barómetro Social
Editor: Instituto de Sociologia da Universidade do Porto
Keywords: Citizen Science.; Participação; Riscos ambientais
Info
A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Ano: 2023
Número Páginas:
15p..
Autor(es): Alegre, H.; Cordeiro, D.; Arranja, C.; Moreira, M.; Beceiro, P.; Loureiro, D.
Revista: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
Info
A European and Brazilian cross-national investigation into the Portuguese translation of soundscape perceptual attributes within the SATP project
This paper presents a cross-national investigation into the soundscape perceptual attributes translation from English into European and Brazilian Portuguese. It is a study within the scope of a larger project
Ano: 2023
Autor(es): Ribeiro, L. C.; Alves, S.; Carvalho, M. L. U.; Michalski, R.; Antunes S.
Revista: Applied Acoustics
Editor: Elsevier
Volume:
Vol. 211.
Keywords: ISO/TS 12913-2:2018; Translation Cross-national; Soundscape attributes
Info
A RANS-based Numerical Model to Simulate Overtopping-type Wave Energy Converters Integrated into Breakwaters
This study aims to validate a numerical model based on Reynolds-averaged Navier
Ano: 2023
Número Páginas:
420
Autor(es): Teixeira, P.; Didier, E.
Revista: International Journal of Offshore and Polar Engineering
Editor: IJOPE
Volume:
Vol 33 Nº 4.
Keywords: Turbulence models; Numerical wave flume; RANS; Wave energy; Overtopping wave energy converter
Info
Aerodynamic characterization of the 516 Arouca Pedestrian suspension Bridge over the Paiva River
Given the 516 Arouca pedestrian suspension bridge
Ano: 2023
Número Páginas:
18 pp.
Autor(es): Marques da Silva, F.
Revista: Wind
Editor: MDPI
Volume:
3.
DOI:
10.3390/wind3010006
Keywords: wind tunnel; wind loading; suspended bridges
|
Comunicações
Info
Dynamics of CO2, CH4, and N2O in Ria Formosa coastal lagoon (southwestern Iberia) and export to the Gulf of Cadiz
A first characterization of greenhouse gases had been carried out to study their role and impact in a productive transitional coastal system of the southern Portugal
Ano: 2024
Número Páginas:
17p..
Autor(es): Cravo, A.; Rodrigues, M.; Forja, J.; Ortega, T.; Correia, C.; Sierra, A.
Revista: Science of the Total Environment
Editor: Elsevier
Volume:
(906)167094.
Keywords: Coastal lagoon; Ria Formosa; Gas mass transport; Water - atmosphere fluxes; Greenhouse gases
Info
Global and local geometrical imperfections of pultruded GFRP profiles based on a modal approach
ABSTRACT - The ultimate capacity of pultruded glass fibre reinforced polymer (pGFRP) profiles depends significantly on geometrical imperfections (GIs), given their sensitivity to buckling phenomena arising from both thin walls and low elastic moduli. However, GIs are not yet comprehensively addressed in design guidance. This paper proposes a new approach to characterize the initial GIs of pGFRP profiles based on a modal approach. Given the lack of comprehensive knowledge in this area, this study presents a highly accurate and robust methodology to measure GIs and dimensional deviations (DDs) in pGFRP profiles using a 3D contact coordinate measurement machine (CMM). The modal approach encompasses the measurement of dimensional parameters and a point cloud transformation that enables the assessment of GIs associated with pure buckling modes of pGFRP profiles. This procedure allows the quantification of three types of global GIs associated to (i) minor-axis (weak axis), (ii) major-axis (strong axis) bending, and (iii) twist. Additionally, the procedure also includes the assessment of local GIs, considering the wall (plate-like) imperfections. The separation of GIs into these four types (shape and amplitude) is of major relevance as its paves the way to the development of analytical design formulas for the strength prediction of pGFRP members. The approach described in this paper also serves two important purposes: (i) the statistical analysis of DDs and GIs of pGFRP members, and (ii) the identification of distinct shapes and amplitudes of GIs that form the basis for reliable design considerations of pGFRP members.
Ano: 2024
Número Páginas:
18p..
Autor(es): Silvestre, N.; Correia, J.; Pinheiro, A.; Ribeiro, A.; Lages Martins, L.; Lazzari, J.
Revista: Construction and Building Materials
Editor: ELSEVIER
Volume:
412 (2024) 134813.
Keywords: Modal decomposition; Geometrical imperfections; Dimensional deviation; 3D contact measurements; Pultruded profiles; Glass fibre reinforced polymer (GFRP)
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Número Páginas:
26p..
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: Buildings
Editor: MDPI
Volume:
13.
Keywords: Compatibility; 20th century; Portland cement; Lime
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: buildings
Editor: MDPI
Volume:
13.
Keywords: compatibility; 20th century; Portland cement; lime
Info
2DH modelling and mapping of surfbeat-driven flooding in the shadow of a jettied tidal inlet
Near estuaries and harbours, submerged shoals and defence structures impact the exposure to overtopping. These features may be accounted for in two-dimensional horizontal (2DH) numerical models, either based on phase resolving or phase-average solvers for wave propagation. In between, surfbeat solvers, such as in XBeach, combine an affordable computational cost with the ability to generate and propagate the longer infragravity (IG) waves. However, surfzone wave characteristics and the overtopping exposure modelled with XBeach are sensi tive to settings such as the shape of the forcing wave spectra and the numerical scheme for wave propagation. The present paper explores this sensitivity and assesses the performance of different inundation models built with the 2DH surfbeat solver of XBeach. These models were forced with downscaled water levels and directional wave spectra and the results fuelled a discussion bounded by data collected downdrift of the entrance to the harbour of Figueira da Foz (Portugal). The original second-order upwind scheme, which propagates short-waves with a lower numerical diffusion improved the model performance in terms of long-wave height, and an unconventional breaking criterion better represented the cross-shore distribution of short-wave height near the shore. A cali brated model was validated through the hindcast of an overtopping event observed under moderate swell forcing, and was used to map the overtopping exposure during a hypothetical combination of an energetic swell with a water level having a return period of ~70 years. Compared to the default wave spectra shape and model settings, using an appropriate representation of the short-wave directional spectrum at the open boundary was necessary to reproduce the observed overtopping extent. Refining the cross-shore resolution of the model helped to better represent the observed inundation extents, as also did the reduction of the friction coefficient. Addi tional phase-resolving simulations in 1DH overestimated IG wave energy and produced higher and more frequent overtopping discharges. The differences with the calibrated 2DH surfbeat model increased with the proximity of the inlet and with short-wave height and angle of incidence. Overall, required calibration steps were provided. They aim at making 2DH XBeach surfbeat a credible tool for 1) predicting short and IG wave characteristics up to the shoreline, as well as for 2) providing first estimates of exposure to overtopping in areas with shallow and alongshore-irregular morphologies.
Ano: 2023
Número Páginas:
1-21pp.
Autor(es): Freire, P.; Baptista, P.; Silva, P. A.; Henriques, M.; Azevedo, A.; Oliveira , F.; Fortunato, A. B.; Nahon, A.
Revista: Coastal Engineering
Editor: Elsevier B.V.
Volume:
184.
Keywords: XBeach; Infragravity waves; Ebb-tidal delta; Intermediate beach; Overtopping
Info
A ciência é do povo? Citizen science, reflexões sobre o conceito e os processos científicos da produção da verdade num mundo cada vez mais inseguro
À medida que as ameaças ambientais se multiplicam à escala global exige-se uma mais apurada reflexividade sobre as práticas humanas, as formas de utilização dos territórios e seus recursos e a capacidade de previsão e resposta quanto a eventos ambientais extremos, socialmente disruptivos. Ora, é esta capacidade de previsão que a ciência experimenta em uma dimensão cada vez menos segura, entrando em crise os modelos causais e a pertinência do conhecimento empírico baseado em observações do passado, pois o futuro torna-se progressivamente mais incerto e ameaçador. Incerteza e ameaça que se antecipam em cada crise, sob a manifestação dos riscos ambientais [1]. Algumas destas manifestações tornam-se indetetáveis para os sentidos humanos, a não ser pela própria visibilidade das consequências. As comunidades humanas encontram-se, assim, cada vez mais dependentes da análise e do discurso da ciência para perceberem (mesmo que na impossibilidade de compreenderem com exatidão os mecanismos de exposição) os riscos a que estão expostas. A humanidade parece, pois, acossada numa estrutura medieval do medo, o medo do invisível, na emergência de um novo tipo de sociedade colonizada pelo medo e que dá lugar a todas as derivas políticas [2]....
Ano: 2023
Autor(es): Craveiro, J.
Revista: Plataforma Barómetro Social
Editor: Instituto de Sociologia da Universidade do Porto
Keywords: Citizen Science.; Participação; Riscos ambientais
Info
A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Ano: 2023
Número Páginas:
15p..
Autor(es): Alegre, H.; Cordeiro, D.; Arranja, C.; Moreira, M.; Beceiro, P.; Loureiro, D.
Revista: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
Info
A European and Brazilian cross-national investigation into the Portuguese translation of soundscape perceptual attributes within the SATP project
This paper presents a cross-national investigation into the soundscape perceptual attributes translation from English into European and Brazilian Portuguese. It is a study within the scope of a larger project
Ano: 2023
Autor(es): Ribeiro, L. C.; Alves, S.; Carvalho, M. L. U.; Michalski, R.; Antunes S.
Revista: Applied Acoustics
Editor: Elsevier
Volume:
Vol. 211.
Keywords: ISO/TS 12913-2:2018; Translation Cross-national; Soundscape attributes
Info
A RANS-based Numerical Model to Simulate Overtopping-type Wave Energy Converters Integrated into Breakwaters
This study aims to validate a numerical model based on Reynolds-averaged Navier
Ano: 2023
Número Páginas:
420
Autor(es): Teixeira, P.; Didier, E.
Revista: International Journal of Offshore and Polar Engineering
Editor: IJOPE
Volume:
Vol 33 Nº 4.
Keywords: Turbulence models; Numerical wave flume; RANS; Wave energy; Overtopping wave energy converter
Info
Aerodynamic characterization of the 516 Arouca Pedestrian suspension Bridge over the Paiva River
Given the 516 Arouca pedestrian suspension bridge
Ano: 2023
Número Páginas:
18 pp.
Autor(es): Marques da Silva, F.
Revista: Wind
Editor: MDPI
Volume:
3.
DOI:
10.3390/wind3010006
Keywords: wind tunnel; wind loading; suspended bridges
|
Livros
Info
Dynamics of CO2, CH4, and N2O in Ria Formosa coastal lagoon (southwestern Iberia) and export to the Gulf of Cadiz
A first characterization of greenhouse gases had been carried out to study their role and impact in a productive transitional coastal system of the southern Portugal
Ano: 2024
Número Páginas:
17p..
Autor(es): Cravo, A.; Rodrigues, M.; Forja, J.; Ortega, T.; Correia, C.; Sierra, A.
Revista: Science of the Total Environment
Editor: Elsevier
Volume:
(906)167094.
Keywords: Coastal lagoon; Ria Formosa; Gas mass transport; Water - atmosphere fluxes; Greenhouse gases
Info
Global and local geometrical imperfections of pultruded GFRP profiles based on a modal approach
ABSTRACT - The ultimate capacity of pultruded glass fibre reinforced polymer (pGFRP) profiles depends significantly on geometrical imperfections (GIs), given their sensitivity to buckling phenomena arising from both thin walls and low elastic moduli. However, GIs are not yet comprehensively addressed in design guidance. This paper proposes a new approach to characterize the initial GIs of pGFRP profiles based on a modal approach. Given the lack of comprehensive knowledge in this area, this study presents a highly accurate and robust methodology to measure GIs and dimensional deviations (DDs) in pGFRP profiles using a 3D contact coordinate measurement machine (CMM). The modal approach encompasses the measurement of dimensional parameters and a point cloud transformation that enables the assessment of GIs associated with pure buckling modes of pGFRP profiles. This procedure allows the quantification of three types of global GIs associated to (i) minor-axis (weak axis), (ii) major-axis (strong axis) bending, and (iii) twist. Additionally, the procedure also includes the assessment of local GIs, considering the wall (plate-like) imperfections. The separation of GIs into these four types (shape and amplitude) is of major relevance as its paves the way to the development of analytical design formulas for the strength prediction of pGFRP members. The approach described in this paper also serves two important purposes: (i) the statistical analysis of DDs and GIs of pGFRP members, and (ii) the identification of distinct shapes and amplitudes of GIs that form the basis for reliable design considerations of pGFRP members.
Ano: 2024
Número Páginas:
18p..
Autor(es): Silvestre, N.; Correia, J.; Pinheiro, A.; Ribeiro, A.; Lages Martins, L.; Lazzari, J.
Revista: Construction and Building Materials
Editor: ELSEVIER
Volume:
412 (2024) 134813.
Keywords: Modal decomposition; Geometrical imperfections; Dimensional deviation; 3D contact measurements; Pultruded profiles; Glass fibre reinforced polymer (GFRP)
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Número Páginas:
26p..
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: Buildings
Editor: MDPI
Volume:
13.
Keywords: Compatibility; 20th century; Portland cement; Lime
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: buildings
Editor: MDPI
Volume:
13.
Keywords: compatibility; 20th century; Portland cement; lime
Info
2DH modelling and mapping of surfbeat-driven flooding in the shadow of a jettied tidal inlet
Near estuaries and harbours, submerged shoals and defence structures impact the exposure to overtopping. These features may be accounted for in two-dimensional horizontal (2DH) numerical models, either based on phase resolving or phase-average solvers for wave propagation. In between, surfbeat solvers, such as in XBeach, combine an affordable computational cost with the ability to generate and propagate the longer infragravity (IG) waves. However, surfzone wave characteristics and the overtopping exposure modelled with XBeach are sensi tive to settings such as the shape of the forcing wave spectra and the numerical scheme for wave propagation. The present paper explores this sensitivity and assesses the performance of different inundation models built with the 2DH surfbeat solver of XBeach. These models were forced with downscaled water levels and directional wave spectra and the results fuelled a discussion bounded by data collected downdrift of the entrance to the harbour of Figueira da Foz (Portugal). The original second-order upwind scheme, which propagates short-waves with a lower numerical diffusion improved the model performance in terms of long-wave height, and an unconventional breaking criterion better represented the cross-shore distribution of short-wave height near the shore. A cali brated model was validated through the hindcast of an overtopping event observed under moderate swell forcing, and was used to map the overtopping exposure during a hypothetical combination of an energetic swell with a water level having a return period of ~70 years. Compared to the default wave spectra shape and model settings, using an appropriate representation of the short-wave directional spectrum at the open boundary was necessary to reproduce the observed overtopping extent. Refining the cross-shore resolution of the model helped to better represent the observed inundation extents, as also did the reduction of the friction coefficient. Addi tional phase-resolving simulations in 1DH overestimated IG wave energy and produced higher and more frequent overtopping discharges. The differences with the calibrated 2DH surfbeat model increased with the proximity of the inlet and with short-wave height and angle of incidence. Overall, required calibration steps were provided. They aim at making 2DH XBeach surfbeat a credible tool for 1) predicting short and IG wave characteristics up to the shoreline, as well as for 2) providing first estimates of exposure to overtopping in areas with shallow and alongshore-irregular morphologies.
Ano: 2023
Número Páginas:
1-21pp.
Autor(es): Freire, P.; Baptista, P.; Silva, P. A.; Henriques, M.; Azevedo, A.; Oliveira , F.; Fortunato, A. B.; Nahon, A.
Revista: Coastal Engineering
Editor: Elsevier B.V.
Volume:
184.
Keywords: XBeach; Infragravity waves; Ebb-tidal delta; Intermediate beach; Overtopping
Info
A ciência é do povo? Citizen science, reflexões sobre o conceito e os processos científicos da produção da verdade num mundo cada vez mais inseguro
À medida que as ameaças ambientais se multiplicam à escala global exige-se uma mais apurada reflexividade sobre as práticas humanas, as formas de utilização dos territórios e seus recursos e a capacidade de previsão e resposta quanto a eventos ambientais extremos, socialmente disruptivos. Ora, é esta capacidade de previsão que a ciência experimenta em uma dimensão cada vez menos segura, entrando em crise os modelos causais e a pertinência do conhecimento empírico baseado em observações do passado, pois o futuro torna-se progressivamente mais incerto e ameaçador. Incerteza e ameaça que se antecipam em cada crise, sob a manifestação dos riscos ambientais [1]. Algumas destas manifestações tornam-se indetetáveis para os sentidos humanos, a não ser pela própria visibilidade das consequências. As comunidades humanas encontram-se, assim, cada vez mais dependentes da análise e do discurso da ciência para perceberem (mesmo que na impossibilidade de compreenderem com exatidão os mecanismos de exposição) os riscos a que estão expostas. A humanidade parece, pois, acossada numa estrutura medieval do medo, o medo do invisível, na emergência de um novo tipo de sociedade colonizada pelo medo e que dá lugar a todas as derivas políticas [2]....
Ano: 2023
Autor(es): Craveiro, J.
Revista: Plataforma Barómetro Social
Editor: Instituto de Sociologia da Universidade do Porto
Keywords: Citizen Science.; Participação; Riscos ambientais
Info
A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Ano: 2023
Número Páginas:
15p..
Autor(es): Alegre, H.; Cordeiro, D.; Arranja, C.; Moreira, M.; Beceiro, P.; Loureiro, D.
Revista: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
Info
A European and Brazilian cross-national investigation into the Portuguese translation of soundscape perceptual attributes within the SATP project
This paper presents a cross-national investigation into the soundscape perceptual attributes translation from English into European and Brazilian Portuguese. It is a study within the scope of a larger project
Ano: 2023
Autor(es): Ribeiro, L. C.; Alves, S.; Carvalho, M. L. U.; Michalski, R.; Antunes S.
Revista: Applied Acoustics
Editor: Elsevier
Volume:
Vol. 211.
Keywords: ISO/TS 12913-2:2018; Translation Cross-national; Soundscape attributes
Info
A RANS-based Numerical Model to Simulate Overtopping-type Wave Energy Converters Integrated into Breakwaters
This study aims to validate a numerical model based on Reynolds-averaged Navier
Ano: 2023
Número Páginas:
420
Autor(es): Teixeira, P.; Didier, E.
Revista: International Journal of Offshore and Polar Engineering
Editor: IJOPE
Volume:
Vol 33 Nº 4.
Keywords: Turbulence models; Numerical wave flume; RANS; Wave energy; Overtopping wave energy converter
Info
Aerodynamic characterization of the 516 Arouca Pedestrian suspension Bridge over the Paiva River
Given the 516 Arouca pedestrian suspension bridge
Ano: 2023
Número Páginas:
18 pp.
Autor(es): Marques da Silva, F.
Revista: Wind
Editor: MDPI
Volume:
3.
DOI:
10.3390/wind3010006
Keywords: wind tunnel; wind loading; suspended bridges
|
Capítulos de Livros
Info
Dynamics of CO2, CH4, and N2O in Ria Formosa coastal lagoon (southwestern Iberia) and export to the Gulf of Cadiz
A first characterization of greenhouse gases had been carried out to study their role and impact in a productive transitional coastal system of the southern Portugal
Ano: 2024
Número Páginas:
17p..
Autor(es): Cravo, A.; Rodrigues, M.; Forja, J.; Ortega, T.; Correia, C.; Sierra, A.
Revista: Science of the Total Environment
Editor: Elsevier
Volume:
(906)167094.
Keywords: Coastal lagoon; Ria Formosa; Gas mass transport; Water - atmosphere fluxes; Greenhouse gases
Info
Global and local geometrical imperfections of pultruded GFRP profiles based on a modal approach
ABSTRACT - The ultimate capacity of pultruded glass fibre reinforced polymer (pGFRP) profiles depends significantly on geometrical imperfections (GIs), given their sensitivity to buckling phenomena arising from both thin walls and low elastic moduli. However, GIs are not yet comprehensively addressed in design guidance. This paper proposes a new approach to characterize the initial GIs of pGFRP profiles based on a modal approach. Given the lack of comprehensive knowledge in this area, this study presents a highly accurate and robust methodology to measure GIs and dimensional deviations (DDs) in pGFRP profiles using a 3D contact coordinate measurement machine (CMM). The modal approach encompasses the measurement of dimensional parameters and a point cloud transformation that enables the assessment of GIs associated with pure buckling modes of pGFRP profiles. This procedure allows the quantification of three types of global GIs associated to (i) minor-axis (weak axis), (ii) major-axis (strong axis) bending, and (iii) twist. Additionally, the procedure also includes the assessment of local GIs, considering the wall (plate-like) imperfections. The separation of GIs into these four types (shape and amplitude) is of major relevance as its paves the way to the development of analytical design formulas for the strength prediction of pGFRP members. The approach described in this paper also serves two important purposes: (i) the statistical analysis of DDs and GIs of pGFRP members, and (ii) the identification of distinct shapes and amplitudes of GIs that form the basis for reliable design considerations of pGFRP members.
Ano: 2024
Número Páginas:
18p..
Autor(es): Silvestre, N.; Correia, J.; Pinheiro, A.; Ribeiro, A.; Lages Martins, L.; Lazzari, J.
Revista: Construction and Building Materials
Editor: ELSEVIER
Volume:
412 (2024) 134813.
Keywords: Modal decomposition; Geometrical imperfections; Dimensional deviation; 3D contact measurements; Pultruded profiles; Glass fibre reinforced polymer (GFRP)
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Número Páginas:
26p..
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: Buildings
Editor: MDPI
Volume:
13.
Keywords: Compatibility; 20th century; Portland cement; Lime
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: buildings
Editor: MDPI
Volume:
13.
Keywords: compatibility; 20th century; Portland cement; lime
Info
2DH modelling and mapping of surfbeat-driven flooding in the shadow of a jettied tidal inlet
Near estuaries and harbours, submerged shoals and defence structures impact the exposure to overtopping. These features may be accounted for in two-dimensional horizontal (2DH) numerical models, either based on phase resolving or phase-average solvers for wave propagation. In between, surfbeat solvers, such as in XBeach, combine an affordable computational cost with the ability to generate and propagate the longer infragravity (IG) waves. However, surfzone wave characteristics and the overtopping exposure modelled with XBeach are sensi tive to settings such as the shape of the forcing wave spectra and the numerical scheme for wave propagation. The present paper explores this sensitivity and assesses the performance of different inundation models built with the 2DH surfbeat solver of XBeach. These models were forced with downscaled water levels and directional wave spectra and the results fuelled a discussion bounded by data collected downdrift of the entrance to the harbour of Figueira da Foz (Portugal). The original second-order upwind scheme, which propagates short-waves with a lower numerical diffusion improved the model performance in terms of long-wave height, and an unconventional breaking criterion better represented the cross-shore distribution of short-wave height near the shore. A cali brated model was validated through the hindcast of an overtopping event observed under moderate swell forcing, and was used to map the overtopping exposure during a hypothetical combination of an energetic swell with a water level having a return period of ~70 years. Compared to the default wave spectra shape and model settings, using an appropriate representation of the short-wave directional spectrum at the open boundary was necessary to reproduce the observed overtopping extent. Refining the cross-shore resolution of the model helped to better represent the observed inundation extents, as also did the reduction of the friction coefficient. Addi tional phase-resolving simulations in 1DH overestimated IG wave energy and produced higher and more frequent overtopping discharges. The differences with the calibrated 2DH surfbeat model increased with the proximity of the inlet and with short-wave height and angle of incidence. Overall, required calibration steps were provided. They aim at making 2DH XBeach surfbeat a credible tool for 1) predicting short and IG wave characteristics up to the shoreline, as well as for 2) providing first estimates of exposure to overtopping in areas with shallow and alongshore-irregular morphologies.
Ano: 2023
Número Páginas:
1-21pp.
Autor(es): Freire, P.; Baptista, P.; Silva, P. A.; Henriques, M.; Azevedo, A.; Oliveira , F.; Fortunato, A. B.; Nahon, A.
Revista: Coastal Engineering
Editor: Elsevier B.V.
Volume:
184.
Keywords: XBeach; Infragravity waves; Ebb-tidal delta; Intermediate beach; Overtopping
Info
A ciência é do povo? Citizen science, reflexões sobre o conceito e os processos científicos da produção da verdade num mundo cada vez mais inseguro
À medida que as ameaças ambientais se multiplicam à escala global exige-se uma mais apurada reflexividade sobre as práticas humanas, as formas de utilização dos territórios e seus recursos e a capacidade de previsão e resposta quanto a eventos ambientais extremos, socialmente disruptivos. Ora, é esta capacidade de previsão que a ciência experimenta em uma dimensão cada vez menos segura, entrando em crise os modelos causais e a pertinência do conhecimento empírico baseado em observações do passado, pois o futuro torna-se progressivamente mais incerto e ameaçador. Incerteza e ameaça que se antecipam em cada crise, sob a manifestação dos riscos ambientais [1]. Algumas destas manifestações tornam-se indetetáveis para os sentidos humanos, a não ser pela própria visibilidade das consequências. As comunidades humanas encontram-se, assim, cada vez mais dependentes da análise e do discurso da ciência para perceberem (mesmo que na impossibilidade de compreenderem com exatidão os mecanismos de exposição) os riscos a que estão expostas. A humanidade parece, pois, acossada numa estrutura medieval do medo, o medo do invisível, na emergência de um novo tipo de sociedade colonizada pelo medo e que dá lugar a todas as derivas políticas [2]....
Ano: 2023
Autor(es): Craveiro, J.
Revista: Plataforma Barómetro Social
Editor: Instituto de Sociologia da Universidade do Porto
Keywords: Citizen Science.; Participação; Riscos ambientais
Info
A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Ano: 2023
Número Páginas:
15p..
Autor(es): Alegre, H.; Cordeiro, D.; Arranja, C.; Moreira, M.; Beceiro, P.; Loureiro, D.
Revista: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
Info
A European and Brazilian cross-national investigation into the Portuguese translation of soundscape perceptual attributes within the SATP project
This paper presents a cross-national investigation into the soundscape perceptual attributes translation from English into European and Brazilian Portuguese. It is a study within the scope of a larger project
Ano: 2023
Autor(es): Ribeiro, L. C.; Alves, S.; Carvalho, M. L. U.; Michalski, R.; Antunes S.
Revista: Applied Acoustics
Editor: Elsevier
Volume:
Vol. 211.
Keywords: ISO/TS 12913-2:2018; Translation Cross-national; Soundscape attributes
Info
A RANS-based Numerical Model to Simulate Overtopping-type Wave Energy Converters Integrated into Breakwaters
This study aims to validate a numerical model based on Reynolds-averaged Navier
Ano: 2023
Número Páginas:
420
Autor(es): Teixeira, P.; Didier, E.
Revista: International Journal of Offshore and Polar Engineering
Editor: IJOPE
Volume:
Vol 33 Nº 4.
Keywords: Turbulence models; Numerical wave flume; RANS; Wave energy; Overtopping wave energy converter
Info
Aerodynamic characterization of the 516 Arouca Pedestrian suspension Bridge over the Paiva River
Given the 516 Arouca pedestrian suspension bridge
Ano: 2023
Número Páginas:
18 pp.
Autor(es): Marques da Silva, F.
Revista: Wind
Editor: MDPI
Volume:
3.
DOI:
10.3390/wind3010006
Keywords: wind tunnel; wind loading; suspended bridges
|
Teses de Doutoramento
Info
Dynamics of CO2, CH4, and N2O in Ria Formosa coastal lagoon (southwestern Iberia) and export to the Gulf of Cadiz
A first characterization of greenhouse gases had been carried out to study their role and impact in a productive transitional coastal system of the southern Portugal
Ano: 2024
Número Páginas:
17p..
Autor(es): Cravo, A.; Rodrigues, M.; Forja, J.; Ortega, T.; Correia, C.; Sierra, A.
Revista: Science of the Total Environment
Editor: Elsevier
Volume:
(906)167094.
Keywords: Coastal lagoon; Ria Formosa; Gas mass transport; Water - atmosphere fluxes; Greenhouse gases
Info
Global and local geometrical imperfections of pultruded GFRP profiles based on a modal approach
ABSTRACT - The ultimate capacity of pultruded glass fibre reinforced polymer (pGFRP) profiles depends significantly on geometrical imperfections (GIs), given their sensitivity to buckling phenomena arising from both thin walls and low elastic moduli. However, GIs are not yet comprehensively addressed in design guidance. This paper proposes a new approach to characterize the initial GIs of pGFRP profiles based on a modal approach. Given the lack of comprehensive knowledge in this area, this study presents a highly accurate and robust methodology to measure GIs and dimensional deviations (DDs) in pGFRP profiles using a 3D contact coordinate measurement machine (CMM). The modal approach encompasses the measurement of dimensional parameters and a point cloud transformation that enables the assessment of GIs associated with pure buckling modes of pGFRP profiles. This procedure allows the quantification of three types of global GIs associated to (i) minor-axis (weak axis), (ii) major-axis (strong axis) bending, and (iii) twist. Additionally, the procedure also includes the assessment of local GIs, considering the wall (plate-like) imperfections. The separation of GIs into these four types (shape and amplitude) is of major relevance as its paves the way to the development of analytical design formulas for the strength prediction of pGFRP members. The approach described in this paper also serves two important purposes: (i) the statistical analysis of DDs and GIs of pGFRP members, and (ii) the identification of distinct shapes and amplitudes of GIs that form the basis for reliable design considerations of pGFRP members.
Ano: 2024
Número Páginas:
18p..
Autor(es): Silvestre, N.; Correia, J.; Pinheiro, A.; Ribeiro, A.; Lages Martins, L.; Lazzari, J.
Revista: Construction and Building Materials
Editor: ELSEVIER
Volume:
412 (2024) 134813.
Keywords: Modal decomposition; Geometrical imperfections; Dimensional deviation; 3D contact measurements; Pultruded profiles; Glass fibre reinforced polymer (GFRP)
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Número Páginas:
26p..
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: Buildings
Editor: MDPI
Volume:
13.
Keywords: Compatibility; 20th century; Portland cement; Lime
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: buildings
Editor: MDPI
Volume:
13.
Keywords: compatibility; 20th century; Portland cement; lime
Info
2DH modelling and mapping of surfbeat-driven flooding in the shadow of a jettied tidal inlet
Near estuaries and harbours, submerged shoals and defence structures impact the exposure to overtopping. These features may be accounted for in two-dimensional horizontal (2DH) numerical models, either based on phase resolving or phase-average solvers for wave propagation. In between, surfbeat solvers, such as in XBeach, combine an affordable computational cost with the ability to generate and propagate the longer infragravity (IG) waves. However, surfzone wave characteristics and the overtopping exposure modelled with XBeach are sensi tive to settings such as the shape of the forcing wave spectra and the numerical scheme for wave propagation. The present paper explores this sensitivity and assesses the performance of different inundation models built with the 2DH surfbeat solver of XBeach. These models were forced with downscaled water levels and directional wave spectra and the results fuelled a discussion bounded by data collected downdrift of the entrance to the harbour of Figueira da Foz (Portugal). The original second-order upwind scheme, which propagates short-waves with a lower numerical diffusion improved the model performance in terms of long-wave height, and an unconventional breaking criterion better represented the cross-shore distribution of short-wave height near the shore. A cali brated model was validated through the hindcast of an overtopping event observed under moderate swell forcing, and was used to map the overtopping exposure during a hypothetical combination of an energetic swell with a water level having a return period of ~70 years. Compared to the default wave spectra shape and model settings, using an appropriate representation of the short-wave directional spectrum at the open boundary was necessary to reproduce the observed overtopping extent. Refining the cross-shore resolution of the model helped to better represent the observed inundation extents, as also did the reduction of the friction coefficient. Addi tional phase-resolving simulations in 1DH overestimated IG wave energy and produced higher and more frequent overtopping discharges. The differences with the calibrated 2DH surfbeat model increased with the proximity of the inlet and with short-wave height and angle of incidence. Overall, required calibration steps were provided. They aim at making 2DH XBeach surfbeat a credible tool for 1) predicting short and IG wave characteristics up to the shoreline, as well as for 2) providing first estimates of exposure to overtopping in areas with shallow and alongshore-irregular morphologies.
Ano: 2023
Número Páginas:
1-21pp.
Autor(es): Freire, P.; Baptista, P.; Silva, P. A.; Henriques, M.; Azevedo, A.; Oliveira , F.; Fortunato, A. B.; Nahon, A.
Revista: Coastal Engineering
Editor: Elsevier B.V.
Volume:
184.
Keywords: XBeach; Infragravity waves; Ebb-tidal delta; Intermediate beach; Overtopping
Info
A ciência é do povo? Citizen science, reflexões sobre o conceito e os processos científicos da produção da verdade num mundo cada vez mais inseguro
À medida que as ameaças ambientais se multiplicam à escala global exige-se uma mais apurada reflexividade sobre as práticas humanas, as formas de utilização dos territórios e seus recursos e a capacidade de previsão e resposta quanto a eventos ambientais extremos, socialmente disruptivos. Ora, é esta capacidade de previsão que a ciência experimenta em uma dimensão cada vez menos segura, entrando em crise os modelos causais e a pertinência do conhecimento empírico baseado em observações do passado, pois o futuro torna-se progressivamente mais incerto e ameaçador. Incerteza e ameaça que se antecipam em cada crise, sob a manifestação dos riscos ambientais [1]. Algumas destas manifestações tornam-se indetetáveis para os sentidos humanos, a não ser pela própria visibilidade das consequências. As comunidades humanas encontram-se, assim, cada vez mais dependentes da análise e do discurso da ciência para perceberem (mesmo que na impossibilidade de compreenderem com exatidão os mecanismos de exposição) os riscos a que estão expostas. A humanidade parece, pois, acossada numa estrutura medieval do medo, o medo do invisível, na emergência de um novo tipo de sociedade colonizada pelo medo e que dá lugar a todas as derivas políticas [2]....
Ano: 2023
Autor(es): Craveiro, J.
Revista: Plataforma Barómetro Social
Editor: Instituto de Sociologia da Universidade do Porto
Keywords: Citizen Science.; Participação; Riscos ambientais
Info
A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Ano: 2023
Número Páginas:
15p..
Autor(es): Alegre, H.; Cordeiro, D.; Arranja, C.; Moreira, M.; Beceiro, P.; Loureiro, D.
Revista: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
Info
A European and Brazilian cross-national investigation into the Portuguese translation of soundscape perceptual attributes within the SATP project
This paper presents a cross-national investigation into the soundscape perceptual attributes translation from English into European and Brazilian Portuguese. It is a study within the scope of a larger project
Ano: 2023
Autor(es): Ribeiro, L. C.; Alves, S.; Carvalho, M. L. U.; Michalski, R.; Antunes S.
Revista: Applied Acoustics
Editor: Elsevier
Volume:
Vol. 211.
Keywords: ISO/TS 12913-2:2018; Translation Cross-national; Soundscape attributes
Info
A RANS-based Numerical Model to Simulate Overtopping-type Wave Energy Converters Integrated into Breakwaters
This study aims to validate a numerical model based on Reynolds-averaged Navier
Ano: 2023
Número Páginas:
420
Autor(es): Teixeira, P.; Didier, E.
Revista: International Journal of Offshore and Polar Engineering
Editor: IJOPE
Volume:
Vol 33 Nº 4.
Keywords: Turbulence models; Numerical wave flume; RANS; Wave energy; Overtopping wave energy converter
Info
Aerodynamic characterization of the 516 Arouca Pedestrian suspension Bridge over the Paiva River
Given the 516 Arouca pedestrian suspension bridge
Ano: 2023
Número Páginas:
18 pp.
Autor(es): Marques da Silva, F.
Revista: Wind
Editor: MDPI
Volume:
3.
DOI:
10.3390/wind3010006
Keywords: wind tunnel; wind loading; suspended bridges
|
Dissertações de Mestrado
Info
Decisões estratégicas no ciclo de vida dos ativos construídos baseadas em informação técnico-funcional e financeira
As funções financeiras e as funções relacionadas com o desempenho técnico e funcional (não financeiras) estão incorporadas nas atividades de gestão do ciclo de vida de qualquer dos ativos construídos. Essas funções fornecem informação relevante para o estabelecimento de estratégias de operação e de manutenção, bem como para o processo de tomada de decisão relacionado com investimentos a longo prazo em reparações, substituições e reabilitações. O objetivo deste artigo é demonstrar os efeitos da utilização destes dois tipos de funções nas decisões estratégicas de longo prazo da gestão de ativos. Esta demonstração é feita por recurso a uma análise de informação financeira, técnica e funcional de portefólios de edifícios. Para tal, apresenta-se um caso de estudo de dois edifícios escolares públicos construídos, respetivamente nas décadas de 40 e 80 do século passado, nos quais foram realizadas intervenções profundas de reabilitação no ano de 2010. Consideram-se e comparam-se os efeitos das funções utilizadas para apoiar o processo de tomada de decisão nos períodos que antecederam e sucederam essas intervenções. Os resultados dos cálculos de taxas de depreciação funcional equivalente e financeiras, mostram um desalinhamento entre funcões financeiras e não financeiras e realçam a importância de que se promova esse alinhamento, tendo em vista uma otimização da gestão do ciclo de vida destes edifícios.
Ano: 2023
Número Páginas:
43-55pp..
Autor(es): Vale e Azevedo, A.; Almeida, N.; Salvado, A.
Revista: RAE
Editor: Ponteditora
Volume:
Vol. 1, N.º 1.
Keywords: Custo do Ciclo de Vida; Taxas de depreciação; Funções financeiras; Funções técnicas e funcionais; Gestão de edifícios
Info
Determinants of shared e-scooters usage in the city of Braga: results from a mobility survey and trip data analysis
Shared mobility services can lead to a transformative impact on many cities around the world by enhancing transport accessibility, and modal shift. Therefore, the present research uses a mobility survey and data analysis from e-scooter trips in Braga, Portugal to acknowledge the determinants of shared e-scooter usage in order to understand how cities can continue promoting a modal shift from cars to more sustainable mobility options. The survey was conducted regarding that heavy e-scooter traffic is estimated to occur in university campus areas, while the trip data analyses compare e-scooter displacement patterns in 2019 and 2021. The results show that e-scooters are a rising actor to enable people's displacement, but improvements to the infrastructure offered for this mode of transport (e.g., parking spots, and traffic calming) are crucial to enable a safe and comfortable journey.
Ano: 2023
Número Páginas:
4002-4009pp..
Autor(es): Arsénio, E.; Ribeiro , P; Dias, G.
Revista: Transportation Research Procedia
Editor: Elsevier
Volume:
72.
Keywords: E-scooter mobility survey; Determinants of e-scooter usage; Shared micromobility; Shared e-scooters
Info
Determination of Wave Run-Up Through the TimesTack Methology and hrough a Resistive Wave Gauge. a Comparative Analysis
The objective of this work is the comparison of two methodologies used for run-up measurements in a two-dimensional physical model, which represented the protection breakwaters of the Peniche and Ericeira
Ano: 2023
Autor(es): Rito, J.; Andriolo, U.; Fortes, C. J. E. M.; Fontes, R.; Lemos, R.
Editor: Reterm
Keywords: Breakwater; Physical model; RimeStack; Video analysis; Run-up
Info
Development of a Bayesian networks-based early warning system for wave-induced flooding
Coastal flooding prediction systems can be an efficient risk-reduction instrument. The goal of this study was to design, build, test, and implement a wave-induced flooding early warning system in urban areas fronted by sandy beaches. The system utilizes a novel approach that combines Bayesian Networks and numerical models (SWAN + XBeach) and was developed in two phases. In the development phase, firstly, the learning information was generated including the creation of oceanic conditions, modeling overtopping discharges, the haracterization of the associated im pacts (no, low, moderate and high) in pedestrians, urban components and buildings, and vehicles, and secondly, the Bayesian Networks were designed that surrogated the previously generated information. After their training, the conditional probability tables were created representing the foundation to make predictions in the operational phase. This methodology was validated for several historical events which hit the study area (Praia de Faro, Portugal), and the system correctly predicted the impact level of around 80% of the cases. Also, the predictive skills varied depending on the level, with the no and high impact levels overcoming the intermediate levels. In terms of efficiency, one simulation (deterministic) of coastal flooding for 72 h by running SWAN + XBeach operationally would take more than two days on a one-logical processor workstation, while the current approach can provide quasi-instantaneously predictions for that period, including probability distributions. Moreover, the two-working phase approach is very flexible enabling the inclusion of additional features such as social components representing a powerful tool for risk reduction in coastal communities.
Ano: 2023
Número Páginas:
19p..
Autor(es): Reis, M. T. L. G. V.; Pinheiro, L.; Ferreira, A. M.; Fortes, C. J. E. M.; Zózimo, A. C.; Ferreira, Ó.; Garzon, J.L.
Revista: International Journal of Disaster Risk Reduction
Editor: Elsevier
Volume:
Volume 96.
Keywords: Wave overtopping; Sandy beaches; Bayesian network; XBeach; Prediction system
Info
Diversity and distribution of microbial communities on the surface of External Thermal Insulation Composite Systems (ETICS) facades in residential buildings
External Thermal Insulation Composite Systems (ETICS) are frequently used to enhance the energy efficiency of the built environment. However, stains of presumable biological nature are often detected shortly after application, causing cladding defacement and altering the building aesthetics. To address which microbiota could contribute to these biodeterioration related color/aesthetic anomalies, samples collected from stains detected on the surface of building facades with ETICS in three residential sites in Lisbon, Portugal, were analyzed throughmicrobiological culture-dependent technique and culture-independent amplicon DNA high throughput sequencing taxonomic profiling. The obtained data provided a comprehensive description of microbial communities assigned to diverse taxa of the major microbial groups of heterotrophic bacteria, fungi, cyanobacteria, and microalgae (through DNA plastid detection) in the sampled stains. Based on that, we propose that new microorganisms could be added to the list of bio-susceptibility testing organisms in ETICS. Furthermore, microbiota diversity depended more on facade location and cardinal orientation than on ETICS material composition. Overall, this study reveals the unique microbial communities of color/aesthetic biodeterioration stains in ETICS facades, unlike those of other surfaces, and the associated environmental dynamics.
Ano: 2023
Número Páginas:
12p..
Autor(es): Flores-Colen, I.; Veiga, M. R.; Malanho, S.; Lina Nunes; Parracha, J.; Moreira, L.; Borsoi, G.; Viegas, C.
Revista: International Biodeterioration & Biodegradation
Editor: Elsevier, Ltd.
Volume:
Volume 184, Número 105658.
Keywords: Amplicon high throughput sequencing; Microbiota communities; Bio-colonized stains; Color/aesthetic anomalies; ETICS; Building facades
Info
Diversity and distribution of microbial communities on the surface of External Thermal Insulation Composite Systems (ETICS) facades in residential buildings.
External Thermal Insulation Composite Systems (ETICS) are frequently used to enhance the energy efficiency of the built environment. However, stains of presumable biological nature are often detected shortly after application, causing cladding defacement and altering the building aesthetics. To address which microbiota could contribute to these biodeterioration related color/aesthetic anomalies, samples collected from stains detected on the surface of building facades with ETICS in three residential sites in Lisbon, Portugal, were analyzed through microbiological culture-dependent technique and culture-independent amplicon DNA high throughput sequencing taxonomic profiling. The obtained data provided a comprehensive description of microbial communities assigned to diverse taxa of the major microbial groups of heterotrophic bacteria, fungi, cyanobacteria, and microalgae (through DNA plastid detection) in the sampled stains. Based on that, we propose that new microorganisms could be added to the list of bio-susceptibility testing organisms in ETICS. Furthermore, microbiota diversity depended more on facade location and cardinal orientation than on ETICS material composition. Overall, this study reveals the unique microbial communities of color/aesthetic biodeterioration stains in ETICS facades, unlike those of other surfaces, and the associated environmental dynamics.
Ano: 2023
Autor(es): Flores-Colen, I.; Veiga, M. R.; Malanho, S.; Nunes, L.; Parracha, J.; Moreira, L.; Borsoi, G.; Viegas, C.
Revista: International Biodeterioration & Biodegradation
Editor: Elsevier
Volume:
nº 184.
Keywords: Lisbon; residential; biodeterioration; biological nature; stains; built environment; energy efficiency; ETICS
Info
Durability of bond of EBR CFRP laminates to concrete under real-time field exposure and laboratory accelerated ageing
The durability of bond between carbon fibre-reinforced polymer (CFRP) laminates and concrete with theexternally bonded reinforcement (EBR) technique was investigated under real-time field exposure (RTFE) andaccelerated ageing. The experimental program, over two years, includes four outdoor environments inducingcarbonation, freeze
Ano: 2023
Autor(es): J. SENA-CRUZ; Cabral-Fonseca, S.; L. CORREIA; R. CRUZ
Revista: Construction and Building Materials
Editor: Elsevier
Volume:
377.
Keywords: concrete; Epoxy adhesive; CFRP laminate; Laboratory accelerated ageing; Real-time field exposure; EBR; Bond; Durability
Info
Dynamic analysis of masonry arches using Maxwell damping
Masonry arches are a fundamental component of historical structures. The assessment of the vulnerability ofthese heritage constructions to seismic loading requires reliable and efficient numerical models. Discrete element models are an alternative to finite element models, being particularly effective in modelling collapse mechanisms created by shearing and separation of the units along the joints. Discrete element codes typically rely on explicit methods of integration of the equations of motion for dynamic analysis, which may require large run times when the recommended stiffness-proportional component of Rayleigh damping is applied. A novel approach is proposed using an alternative damping model, Maxwell damping, which involves placing multiple spring-dashpot elements in the joints, in parallel with the standard stiffness springs. This damping model is tested in the dynamic analysis of masonry arches, under pulse and earthquake loading. The results obtained in this early investigation show a good performance in the simulation of collapse under dynamic loads, in general agreement with the analyses conducted with classical stiffness-proportional damping, but reducing significantly the computational effort.
Ano: 2023
Autor(es): Sarhosis, V.; Lemos, J. V.
Revista: Structures
Editor: Elsevier
Keywords: Masonry arches
Info
Eco-efficient boards with agro-industrial wastes
Laboratory tests were carried out to evaluate the feasibility of producing boards or coating panels with good hygrothermal performance by using different agro-industrial wastes (grape and olive press wastes, hazelnut shells, spent coffee and pine) and adhesives (gypsum-based binder, sodium silicate solution and starch-based glue). Hygrothermal properties and resistance to mould growth, including the effect of citric acid, were evaluated. The results highlighted the benefits and drawbacks of each adhesive: the binder seems more adequate to produce bio-based plastering mortars than boards; the other adhesives seem efficient solutions to produce boards with good hygrothermal properties; for the natural glue the bio-susceptibility needs improvement.
Ano: 2023
Número Páginas:
15p..
Autor(es): Lina Nunes; Duarte, M.; Faria, P.; Cintura, E.
Revista: Construction and Building Materials
Editor: Elsevier, Ltd.
Volume:
Volume 404, 132665.
Keywords: Thermal property; Starch; Sodium Silicate; Natural glue; Hygroscopicity; Hemihydrate gypsum; Citric acid; Bio-waste; Biological susceptibility; Air lime
Info
Effectiveness and durability of anti-graffiti products applied on ETICS: Towards a compatible and sustainable graffiti removal protocol.
External Thermal Insulation Composite Systems (ETICS) are widely used constructive solutions which aim at enhancing the building thermal performance. Nevertheless, ETICS can often present anomalies (e.g., stains and microcracks) throughout their service life, and vandalism actions, as in the case of graffiti, are rather common in urban areas. The removal of undesired graffiti is generally carried out through invasive chemical
Ano: 2023
Número Páginas:
65160-65176pp..
Autor(es): Flores-Colen, I.; Veiga, M. R.; Dionísio, A.; Parracha, J.; Borsoi, G.; Gil, B.
Revista: Environmental Science and Pollution Research
Editor: SpringerLink
Volume:
Vol. 30, pag. 65160-65176..
Keywords: cleaning; urban areas; graffiti; vandalism actions; microcracks; stains; thermal performance; External Thermal Insulation Composite Systems (ETICS)
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Relatórios
Info
Dynamics of CO2, CH4, and N2O in Ria Formosa coastal lagoon (southwestern Iberia) and export to the Gulf of Cadiz
A first characterization of greenhouse gases had been carried out to study their role and impact in a productive transitional coastal system of the southern Portugal
Ano: 2024
Número Páginas:
17p..
Autor(es): Cravo, A.; Rodrigues, M.; Forja, J.; Ortega, T.; Correia, C.; Sierra, A.
Revista: Science of the Total Environment
Editor: Elsevier
Volume:
(906)167094.
Keywords: Coastal lagoon; Ria Formosa; Gas mass transport; Water - atmosphere fluxes; Greenhouse gases
Info
Global and local geometrical imperfections of pultruded GFRP profiles based on a modal approach
ABSTRACT - The ultimate capacity of pultruded glass fibre reinforced polymer (pGFRP) profiles depends significantly on geometrical imperfections (GIs), given their sensitivity to buckling phenomena arising from both thin walls and low elastic moduli. However, GIs are not yet comprehensively addressed in design guidance. This paper proposes a new approach to characterize the initial GIs of pGFRP profiles based on a modal approach. Given the lack of comprehensive knowledge in this area, this study presents a highly accurate and robust methodology to measure GIs and dimensional deviations (DDs) in pGFRP profiles using a 3D contact coordinate measurement machine (CMM). The modal approach encompasses the measurement of dimensional parameters and a point cloud transformation that enables the assessment of GIs associated with pure buckling modes of pGFRP profiles. This procedure allows the quantification of three types of global GIs associated to (i) minor-axis (weak axis), (ii) major-axis (strong axis) bending, and (iii) twist. Additionally, the procedure also includes the assessment of local GIs, considering the wall (plate-like) imperfections. The separation of GIs into these four types (shape and amplitude) is of major relevance as its paves the way to the development of analytical design formulas for the strength prediction of pGFRP members. The approach described in this paper also serves two important purposes: (i) the statistical analysis of DDs and GIs of pGFRP members, and (ii) the identification of distinct shapes and amplitudes of GIs that form the basis for reliable design considerations of pGFRP members.
Ano: 2024
Número Páginas:
18p..
Autor(es): Silvestre, N.; Correia, J.; Pinheiro, A.; Ribeiro, A.; Lages Martins, L.; Lazzari, J.
Revista: Construction and Building Materials
Editor: ELSEVIER
Volume:
412 (2024) 134813.
Keywords: Modal decomposition; Geometrical imperfections; Dimensional deviation; 3D contact measurements; Pultruded profiles; Glass fibre reinforced polymer (GFRP)
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Número Páginas:
26p..
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: Buildings
Editor: MDPI
Volume:
13.
Keywords: Compatibility; 20th century; Portland cement; Lime
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: buildings
Editor: MDPI
Volume:
13.
Keywords: compatibility; 20th century; Portland cement; lime
Info
2DH modelling and mapping of surfbeat-driven flooding in the shadow of a jettied tidal inlet
Near estuaries and harbours, submerged shoals and defence structures impact the exposure to overtopping. These features may be accounted for in two-dimensional horizontal (2DH) numerical models, either based on phase resolving or phase-average solvers for wave propagation. In between, surfbeat solvers, such as in XBeach, combine an affordable computational cost with the ability to generate and propagate the longer infragravity (IG) waves. However, surfzone wave characteristics and the overtopping exposure modelled with XBeach are sensi tive to settings such as the shape of the forcing wave spectra and the numerical scheme for wave propagation. The present paper explores this sensitivity and assesses the performance of different inundation models built with the 2DH surfbeat solver of XBeach. These models were forced with downscaled water levels and directional wave spectra and the results fuelled a discussion bounded by data collected downdrift of the entrance to the harbour of Figueira da Foz (Portugal). The original second-order upwind scheme, which propagates short-waves with a lower numerical diffusion improved the model performance in terms of long-wave height, and an unconventional breaking criterion better represented the cross-shore distribution of short-wave height near the shore. A cali brated model was validated through the hindcast of an overtopping event observed under moderate swell forcing, and was used to map the overtopping exposure during a hypothetical combination of an energetic swell with a water level having a return period of ~70 years. Compared to the default wave spectra shape and model settings, using an appropriate representation of the short-wave directional spectrum at the open boundary was necessary to reproduce the observed overtopping extent. Refining the cross-shore resolution of the model helped to better represent the observed inundation extents, as also did the reduction of the friction coefficient. Addi tional phase-resolving simulations in 1DH overestimated IG wave energy and produced higher and more frequent overtopping discharges. The differences with the calibrated 2DH surfbeat model increased with the proximity of the inlet and with short-wave height and angle of incidence. Overall, required calibration steps were provided. They aim at making 2DH XBeach surfbeat a credible tool for 1) predicting short and IG wave characteristics up to the shoreline, as well as for 2) providing first estimates of exposure to overtopping in areas with shallow and alongshore-irregular morphologies.
Ano: 2023
Número Páginas:
1-21pp.
Autor(es): Freire, P.; Baptista, P.; Silva, P. A.; Henriques, M.; Azevedo, A.; Oliveira , F.; Fortunato, A. B.; Nahon, A.
Revista: Coastal Engineering
Editor: Elsevier B.V.
Volume:
184.
Keywords: XBeach; Infragravity waves; Ebb-tidal delta; Intermediate beach; Overtopping
Info
A ciência é do povo? Citizen science, reflexões sobre o conceito e os processos científicos da produção da verdade num mundo cada vez mais inseguro
À medida que as ameaças ambientais se multiplicam à escala global exige-se uma mais apurada reflexividade sobre as práticas humanas, as formas de utilização dos territórios e seus recursos e a capacidade de previsão e resposta quanto a eventos ambientais extremos, socialmente disruptivos. Ora, é esta capacidade de previsão que a ciência experimenta em uma dimensão cada vez menos segura, entrando em crise os modelos causais e a pertinência do conhecimento empírico baseado em observações do passado, pois o futuro torna-se progressivamente mais incerto e ameaçador. Incerteza e ameaça que se antecipam em cada crise, sob a manifestação dos riscos ambientais [1]. Algumas destas manifestações tornam-se indetetáveis para os sentidos humanos, a não ser pela própria visibilidade das consequências. As comunidades humanas encontram-se, assim, cada vez mais dependentes da análise e do discurso da ciência para perceberem (mesmo que na impossibilidade de compreenderem com exatidão os mecanismos de exposição) os riscos a que estão expostas. A humanidade parece, pois, acossada numa estrutura medieval do medo, o medo do invisível, na emergência de um novo tipo de sociedade colonizada pelo medo e que dá lugar a todas as derivas políticas [2]....
Ano: 2023
Autor(es): Craveiro, J.
Revista: Plataforma Barómetro Social
Editor: Instituto de Sociologia da Universidade do Porto
Keywords: Citizen Science.; Participação; Riscos ambientais
Info
A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Ano: 2023
Número Páginas:
15p..
Autor(es): Alegre, H.; Cordeiro, D.; Arranja, C.; Moreira, M.; Beceiro, P.; Loureiro, D.
Revista: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
Info
A European and Brazilian cross-national investigation into the Portuguese translation of soundscape perceptual attributes within the SATP project
This paper presents a cross-national investigation into the soundscape perceptual attributes translation from English into European and Brazilian Portuguese. It is a study within the scope of a larger project
Ano: 2023
Autor(es): Ribeiro, L. C.; Alves, S.; Carvalho, M. L. U.; Michalski, R.; Antunes S.
Revista: Applied Acoustics
Editor: Elsevier
Volume:
Vol. 211.
Keywords: ISO/TS 12913-2:2018; Translation Cross-national; Soundscape attributes
Info
A RANS-based Numerical Model to Simulate Overtopping-type Wave Energy Converters Integrated into Breakwaters
This study aims to validate a numerical model based on Reynolds-averaged Navier
Ano: 2023
Número Páginas:
420
Autor(es): Teixeira, P.; Didier, E.
Revista: International Journal of Offshore and Polar Engineering
Editor: IJOPE
Volume:
Vol 33 Nº 4.
Keywords: Turbulence models; Numerical wave flume; RANS; Wave energy; Overtopping wave energy converter
Info
Aerodynamic characterization of the 516 Arouca Pedestrian suspension Bridge over the Paiva River
Given the 516 Arouca pedestrian suspension bridge
Ano: 2023
Número Páginas:
18 pp.
Autor(es): Marques da Silva, F.
Revista: Wind
Editor: MDPI
Volume:
3.
DOI:
10.3390/wind3010006
Keywords: wind tunnel; wind loading; suspended bridges
|
Informações Científicas e Técnicas
Info
Dynamics of CO2, CH4, and N2O in Ria Formosa coastal lagoon (southwestern Iberia) and export to the Gulf of Cadiz
A first characterization of greenhouse gases had been carried out to study their role and impact in a productive transitional coastal system of the southern Portugal
Ano: 2024
Número Páginas:
17p..
Autor(es): Cravo, A.; Rodrigues, M.; Forja, J.; Ortega, T.; Correia, C.; Sierra, A.
Revista: Science of the Total Environment
Editor: Elsevier
Volume:
(906)167094.
Keywords: Coastal lagoon; Ria Formosa; Gas mass transport; Water - atmosphere fluxes; Greenhouse gases
Info
Global and local geometrical imperfections of pultruded GFRP profiles based on a modal approach
ABSTRACT - The ultimate capacity of pultruded glass fibre reinforced polymer (pGFRP) profiles depends significantly on geometrical imperfections (GIs), given their sensitivity to buckling phenomena arising from both thin walls and low elastic moduli. However, GIs are not yet comprehensively addressed in design guidance. This paper proposes a new approach to characterize the initial GIs of pGFRP profiles based on a modal approach. Given the lack of comprehensive knowledge in this area, this study presents a highly accurate and robust methodology to measure GIs and dimensional deviations (DDs) in pGFRP profiles using a 3D contact coordinate measurement machine (CMM). The modal approach encompasses the measurement of dimensional parameters and a point cloud transformation that enables the assessment of GIs associated with pure buckling modes of pGFRP profiles. This procedure allows the quantification of three types of global GIs associated to (i) minor-axis (weak axis), (ii) major-axis (strong axis) bending, and (iii) twist. Additionally, the procedure also includes the assessment of local GIs, considering the wall (plate-like) imperfections. The separation of GIs into these four types (shape and amplitude) is of major relevance as its paves the way to the development of analytical design formulas for the strength prediction of pGFRP members. The approach described in this paper also serves two important purposes: (i) the statistical analysis of DDs and GIs of pGFRP members, and (ii) the identification of distinct shapes and amplitudes of GIs that form the basis for reliable design considerations of pGFRP members.
Ano: 2024
Número Páginas:
18p..
Autor(es): Silvestre, N.; Correia, J.; Pinheiro, A.; Ribeiro, A.; Lages Martins, L.; Lazzari, J.
Revista: Construction and Building Materials
Editor: ELSEVIER
Volume:
412 (2024) 134813.
Keywords: Modal decomposition; Geometrical imperfections; Dimensional deviation; 3D contact measurements; Pultruded profiles; Glass fibre reinforced polymer (GFRP)
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Número Páginas:
26p..
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: Buildings
Editor: MDPI
Volume:
13.
Keywords: Compatibility; 20th century; Portland cement; Lime
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: buildings
Editor: MDPI
Volume:
13.
Keywords: compatibility; 20th century; Portland cement; lime
Info
2DH modelling and mapping of surfbeat-driven flooding in the shadow of a jettied tidal inlet
Near estuaries and harbours, submerged shoals and defence structures impact the exposure to overtopping. These features may be accounted for in two-dimensional horizontal (2DH) numerical models, either based on phase resolving or phase-average solvers for wave propagation. In between, surfbeat solvers, such as in XBeach, combine an affordable computational cost with the ability to generate and propagate the longer infragravity (IG) waves. However, surfzone wave characteristics and the overtopping exposure modelled with XBeach are sensi tive to settings such as the shape of the forcing wave spectra and the numerical scheme for wave propagation. The present paper explores this sensitivity and assesses the performance of different inundation models built with the 2DH surfbeat solver of XBeach. These models were forced with downscaled water levels and directional wave spectra and the results fuelled a discussion bounded by data collected downdrift of the entrance to the harbour of Figueira da Foz (Portugal). The original second-order upwind scheme, which propagates short-waves with a lower numerical diffusion improved the model performance in terms of long-wave height, and an unconventional breaking criterion better represented the cross-shore distribution of short-wave height near the shore. A cali brated model was validated through the hindcast of an overtopping event observed under moderate swell forcing, and was used to map the overtopping exposure during a hypothetical combination of an energetic swell with a water level having a return period of ~70 years. Compared to the default wave spectra shape and model settings, using an appropriate representation of the short-wave directional spectrum at the open boundary was necessary to reproduce the observed overtopping extent. Refining the cross-shore resolution of the model helped to better represent the observed inundation extents, as also did the reduction of the friction coefficient. Addi tional phase-resolving simulations in 1DH overestimated IG wave energy and produced higher and more frequent overtopping discharges. The differences with the calibrated 2DH surfbeat model increased with the proximity of the inlet and with short-wave height and angle of incidence. Overall, required calibration steps were provided. They aim at making 2DH XBeach surfbeat a credible tool for 1) predicting short and IG wave characteristics up to the shoreline, as well as for 2) providing first estimates of exposure to overtopping in areas with shallow and alongshore-irregular morphologies.
Ano: 2023
Número Páginas:
1-21pp.
Autor(es): Freire, P.; Baptista, P.; Silva, P. A.; Henriques, M.; Azevedo, A.; Oliveira , F.; Fortunato, A. B.; Nahon, A.
Revista: Coastal Engineering
Editor: Elsevier B.V.
Volume:
184.
Keywords: XBeach; Infragravity waves; Ebb-tidal delta; Intermediate beach; Overtopping
Info
A ciência é do povo? Citizen science, reflexões sobre o conceito e os processos científicos da produção da verdade num mundo cada vez mais inseguro
À medida que as ameaças ambientais se multiplicam à escala global exige-se uma mais apurada reflexividade sobre as práticas humanas, as formas de utilização dos territórios e seus recursos e a capacidade de previsão e resposta quanto a eventos ambientais extremos, socialmente disruptivos. Ora, é esta capacidade de previsão que a ciência experimenta em uma dimensão cada vez menos segura, entrando em crise os modelos causais e a pertinência do conhecimento empírico baseado em observações do passado, pois o futuro torna-se progressivamente mais incerto e ameaçador. Incerteza e ameaça que se antecipam em cada crise, sob a manifestação dos riscos ambientais [1]. Algumas destas manifestações tornam-se indetetáveis para os sentidos humanos, a não ser pela própria visibilidade das consequências. As comunidades humanas encontram-se, assim, cada vez mais dependentes da análise e do discurso da ciência para perceberem (mesmo que na impossibilidade de compreenderem com exatidão os mecanismos de exposição) os riscos a que estão expostas. A humanidade parece, pois, acossada numa estrutura medieval do medo, o medo do invisível, na emergência de um novo tipo de sociedade colonizada pelo medo e que dá lugar a todas as derivas políticas [2]....
Ano: 2023
Autor(es): Craveiro, J.
Revista: Plataforma Barómetro Social
Editor: Instituto de Sociologia da Universidade do Porto
Keywords: Citizen Science.; Participação; Riscos ambientais
Info
A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Ano: 2023
Número Páginas:
15p..
Autor(es): Alegre, H.; Cordeiro, D.; Arranja, C.; Moreira, M.; Beceiro, P.; Loureiro, D.
Revista: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
Info
A European and Brazilian cross-national investigation into the Portuguese translation of soundscape perceptual attributes within the SATP project
This paper presents a cross-national investigation into the soundscape perceptual attributes translation from English into European and Brazilian Portuguese. It is a study within the scope of a larger project
Ano: 2023
Autor(es): Ribeiro, L. C.; Alves, S.; Carvalho, M. L. U.; Michalski, R.; Antunes S.
Revista: Applied Acoustics
Editor: Elsevier
Volume:
Vol. 211.
Keywords: ISO/TS 12913-2:2018; Translation Cross-national; Soundscape attributes
Info
A RANS-based Numerical Model to Simulate Overtopping-type Wave Energy Converters Integrated into Breakwaters
This study aims to validate a numerical model based on Reynolds-averaged Navier
Ano: 2023
Número Páginas:
420
Autor(es): Teixeira, P.; Didier, E.
Revista: International Journal of Offshore and Polar Engineering
Editor: IJOPE
Volume:
Vol 33 Nº 4.
Keywords: Turbulence models; Numerical wave flume; RANS; Wave energy; Overtopping wave energy converter
Info
Aerodynamic characterization of the 516 Arouca Pedestrian suspension Bridge over the Paiva River
Given the 516 Arouca pedestrian suspension bridge
Ano: 2023
Número Páginas:
18 pp.
Autor(es): Marques da Silva, F.
Revista: Wind
Editor: MDPI
Volume:
3.
DOI:
10.3390/wind3010006
Keywords: wind tunnel; wind loading; suspended bridges
|
Memórias
Info
Dynamics of CO2, CH4, and N2O in Ria Formosa coastal lagoon (southwestern Iberia) and export to the Gulf of Cadiz
A first characterization of greenhouse gases had been carried out to study their role and impact in a productive transitional coastal system of the southern Portugal
Ano: 2024
Número Páginas:
17p..
Autor(es): Cravo, A.; Rodrigues, M.; Forja, J.; Ortega, T.; Correia, C.; Sierra, A.
Revista: Science of the Total Environment
Editor: Elsevier
Volume:
(906)167094.
Keywords: Coastal lagoon; Ria Formosa; Gas mass transport; Water - atmosphere fluxes; Greenhouse gases
Info
Global and local geometrical imperfections of pultruded GFRP profiles based on a modal approach
ABSTRACT - The ultimate capacity of pultruded glass fibre reinforced polymer (pGFRP) profiles depends significantly on geometrical imperfections (GIs), given their sensitivity to buckling phenomena arising from both thin walls and low elastic moduli. However, GIs are not yet comprehensively addressed in design guidance. This paper proposes a new approach to characterize the initial GIs of pGFRP profiles based on a modal approach. Given the lack of comprehensive knowledge in this area, this study presents a highly accurate and robust methodology to measure GIs and dimensional deviations (DDs) in pGFRP profiles using a 3D contact coordinate measurement machine (CMM). The modal approach encompasses the measurement of dimensional parameters and a point cloud transformation that enables the assessment of GIs associated with pure buckling modes of pGFRP profiles. This procedure allows the quantification of three types of global GIs associated to (i) minor-axis (weak axis), (ii) major-axis (strong axis) bending, and (iii) twist. Additionally, the procedure also includes the assessment of local GIs, considering the wall (plate-like) imperfections. The separation of GIs into these four types (shape and amplitude) is of major relevance as its paves the way to the development of analytical design formulas for the strength prediction of pGFRP members. The approach described in this paper also serves two important purposes: (i) the statistical analysis of DDs and GIs of pGFRP members, and (ii) the identification of distinct shapes and amplitudes of GIs that form the basis for reliable design considerations of pGFRP members.
Ano: 2024
Número Páginas:
18p..
Autor(es): Silvestre, N.; Correia, J.; Pinheiro, A.; Ribeiro, A.; Lages Martins, L.; Lazzari, J.
Revista: Construction and Building Materials
Editor: ELSEVIER
Volume:
412 (2024) 134813.
Keywords: Modal decomposition; Geometrical imperfections; Dimensional deviation; 3D contact measurements; Pultruded profiles; Glass fibre reinforced polymer (GFRP)
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Número Páginas:
26p..
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: Buildings
Editor: MDPI
Volume:
13.
Keywords: Compatibility; 20th century; Portland cement; Lime
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: buildings
Editor: MDPI
Volume:
13.
Keywords: compatibility; 20th century; Portland cement; lime
Info
2DH modelling and mapping of surfbeat-driven flooding in the shadow of a jettied tidal inlet
Near estuaries and harbours, submerged shoals and defence structures impact the exposure to overtopping. These features may be accounted for in two-dimensional horizontal (2DH) numerical models, either based on phase resolving or phase-average solvers for wave propagation. In between, surfbeat solvers, such as in XBeach, combine an affordable computational cost with the ability to generate and propagate the longer infragravity (IG) waves. However, surfzone wave characteristics and the overtopping exposure modelled with XBeach are sensi tive to settings such as the shape of the forcing wave spectra and the numerical scheme for wave propagation. The present paper explores this sensitivity and assesses the performance of different inundation models built with the 2DH surfbeat solver of XBeach. These models were forced with downscaled water levels and directional wave spectra and the results fuelled a discussion bounded by data collected downdrift of the entrance to the harbour of Figueira da Foz (Portugal). The original second-order upwind scheme, which propagates short-waves with a lower numerical diffusion improved the model performance in terms of long-wave height, and an unconventional breaking criterion better represented the cross-shore distribution of short-wave height near the shore. A cali brated model was validated through the hindcast of an overtopping event observed under moderate swell forcing, and was used to map the overtopping exposure during a hypothetical combination of an energetic swell with a water level having a return period of ~70 years. Compared to the default wave spectra shape and model settings, using an appropriate representation of the short-wave directional spectrum at the open boundary was necessary to reproduce the observed overtopping extent. Refining the cross-shore resolution of the model helped to better represent the observed inundation extents, as also did the reduction of the friction coefficient. Addi tional phase-resolving simulations in 1DH overestimated IG wave energy and produced higher and more frequent overtopping discharges. The differences with the calibrated 2DH surfbeat model increased with the proximity of the inlet and with short-wave height and angle of incidence. Overall, required calibration steps were provided. They aim at making 2DH XBeach surfbeat a credible tool for 1) predicting short and IG wave characteristics up to the shoreline, as well as for 2) providing first estimates of exposure to overtopping in areas with shallow and alongshore-irregular morphologies.
Ano: 2023
Número Páginas:
1-21pp.
Autor(es): Freire, P.; Baptista, P.; Silva, P. A.; Henriques, M.; Azevedo, A.; Oliveira , F.; Fortunato, A. B.; Nahon, A.
Revista: Coastal Engineering
Editor: Elsevier B.V.
Volume:
184.
Keywords: XBeach; Infragravity waves; Ebb-tidal delta; Intermediate beach; Overtopping
Info
A ciência é do povo? Citizen science, reflexões sobre o conceito e os processos científicos da produção da verdade num mundo cada vez mais inseguro
À medida que as ameaças ambientais se multiplicam à escala global exige-se uma mais apurada reflexividade sobre as práticas humanas, as formas de utilização dos territórios e seus recursos e a capacidade de previsão e resposta quanto a eventos ambientais extremos, socialmente disruptivos. Ora, é esta capacidade de previsão que a ciência experimenta em uma dimensão cada vez menos segura, entrando em crise os modelos causais e a pertinência do conhecimento empírico baseado em observações do passado, pois o futuro torna-se progressivamente mais incerto e ameaçador. Incerteza e ameaça que se antecipam em cada crise, sob a manifestação dos riscos ambientais [1]. Algumas destas manifestações tornam-se indetetáveis para os sentidos humanos, a não ser pela própria visibilidade das consequências. As comunidades humanas encontram-se, assim, cada vez mais dependentes da análise e do discurso da ciência para perceberem (mesmo que na impossibilidade de compreenderem com exatidão os mecanismos de exposição) os riscos a que estão expostas. A humanidade parece, pois, acossada numa estrutura medieval do medo, o medo do invisível, na emergência de um novo tipo de sociedade colonizada pelo medo e que dá lugar a todas as derivas políticas [2]....
Ano: 2023
Autor(es): Craveiro, J.
Revista: Plataforma Barómetro Social
Editor: Instituto de Sociologia da Universidade do Porto
Keywords: Citizen Science.; Participação; Riscos ambientais
Info
A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Ano: 2023
Número Páginas:
15p..
Autor(es): Alegre, H.; Cordeiro, D.; Arranja, C.; Moreira, M.; Beceiro, P.; Loureiro, D.
Revista: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
Info
A European and Brazilian cross-national investigation into the Portuguese translation of soundscape perceptual attributes within the SATP project
This paper presents a cross-national investigation into the soundscape perceptual attributes translation from English into European and Brazilian Portuguese. It is a study within the scope of a larger project
Ano: 2023
Autor(es): Ribeiro, L. C.; Alves, S.; Carvalho, M. L. U.; Michalski, R.; Antunes S.
Revista: Applied Acoustics
Editor: Elsevier
Volume:
Vol. 211.
Keywords: ISO/TS 12913-2:2018; Translation Cross-national; Soundscape attributes
Info
A RANS-based Numerical Model to Simulate Overtopping-type Wave Energy Converters Integrated into Breakwaters
This study aims to validate a numerical model based on Reynolds-averaged Navier
Ano: 2023
Número Páginas:
420
Autor(es): Teixeira, P.; Didier, E.
Revista: International Journal of Offshore and Polar Engineering
Editor: IJOPE
Volume:
Vol 33 Nº 4.
Keywords: Turbulence models; Numerical wave flume; RANS; Wave energy; Overtopping wave energy converter
Info
Aerodynamic characterization of the 516 Arouca Pedestrian suspension Bridge over the Paiva River
Given the 516 Arouca pedestrian suspension bridge
Ano: 2023
Número Páginas:
18 pp.
Autor(es): Marques da Silva, F.
Revista: Wind
Editor: MDPI
Volume:
3.
DOI:
10.3390/wind3010006
Keywords: wind tunnel; wind loading; suspended bridges
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Outros
Info
Dynamics of CO2, CH4, and N2O in Ria Formosa coastal lagoon (southwestern Iberia) and export to the Gulf of Cadiz
A first characterization of greenhouse gases had been carried out to study their role and impact in a productive transitional coastal system of the southern Portugal
Ano: 2024
Número Páginas:
17p..
Autor(es): Cravo, A.; Rodrigues, M.; Forja, J.; Ortega, T.; Correia, C.; Sierra, A.
Revista: Science of the Total Environment
Editor: Elsevier
Volume:
(906)167094.
Keywords: Coastal lagoon; Ria Formosa; Gas mass transport; Water - atmosphere fluxes; Greenhouse gases
Info
Global and local geometrical imperfections of pultruded GFRP profiles based on a modal approach
ABSTRACT - The ultimate capacity of pultruded glass fibre reinforced polymer (pGFRP) profiles depends significantly on geometrical imperfections (GIs), given their sensitivity to buckling phenomena arising from both thin walls and low elastic moduli. However, GIs are not yet comprehensively addressed in design guidance. This paper proposes a new approach to characterize the initial GIs of pGFRP profiles based on a modal approach. Given the lack of comprehensive knowledge in this area, this study presents a highly accurate and robust methodology to measure GIs and dimensional deviations (DDs) in pGFRP profiles using a 3D contact coordinate measurement machine (CMM). The modal approach encompasses the measurement of dimensional parameters and a point cloud transformation that enables the assessment of GIs associated with pure buckling modes of pGFRP profiles. This procedure allows the quantification of three types of global GIs associated to (i) minor-axis (weak axis), (ii) major-axis (strong axis) bending, and (iii) twist. Additionally, the procedure also includes the assessment of local GIs, considering the wall (plate-like) imperfections. The separation of GIs into these four types (shape and amplitude) is of major relevance as its paves the way to the development of analytical design formulas for the strength prediction of pGFRP members. The approach described in this paper also serves two important purposes: (i) the statistical analysis of DDs and GIs of pGFRP members, and (ii) the identification of distinct shapes and amplitudes of GIs that form the basis for reliable design considerations of pGFRP members.
Ano: 2024
Número Páginas:
18p..
Autor(es): Silvestre, N.; Correia, J.; Pinheiro, A.; Ribeiro, A.; Lages Martins, L.; Lazzari, J.
Revista: Construction and Building Materials
Editor: ELSEVIER
Volume:
412 (2024) 134813.
Keywords: Modal decomposition; Geometrical imperfections; Dimensional deviation; 3D contact measurements; Pultruded profiles; Glass fibre reinforced polymer (GFRP)
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Número Páginas:
26p..
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: Buildings
Editor: MDPI
Volume:
13.
Keywords: Compatibility; 20th century; Portland cement; Lime
Info
20th Century Mortars: Physical and Mechanical Properties from Awarded Buildings in Lisbon (Portugal)
This paper addresses the study of renders and plasters
Ano: 2023
Autor(es): Mirão, J.; Veiga, M. R.; Santos Silva, A.; Almeida, L.
Revista: buildings
Editor: MDPI
Volume:
13.
Keywords: compatibility; 20th century; Portland cement; lime
Info
2DH modelling and mapping of surfbeat-driven flooding in the shadow of a jettied tidal inlet
Near estuaries and harbours, submerged shoals and defence structures impact the exposure to overtopping. These features may be accounted for in two-dimensional horizontal (2DH) numerical models, either based on phase resolving or phase-average solvers for wave propagation. In between, surfbeat solvers, such as in XBeach, combine an affordable computational cost with the ability to generate and propagate the longer infragravity (IG) waves. However, surfzone wave characteristics and the overtopping exposure modelled with XBeach are sensi tive to settings such as the shape of the forcing wave spectra and the numerical scheme for wave propagation. The present paper explores this sensitivity and assesses the performance of different inundation models built with the 2DH surfbeat solver of XBeach. These models were forced with downscaled water levels and directional wave spectra and the results fuelled a discussion bounded by data collected downdrift of the entrance to the harbour of Figueira da Foz (Portugal). The original second-order upwind scheme, which propagates short-waves with a lower numerical diffusion improved the model performance in terms of long-wave height, and an unconventional breaking criterion better represented the cross-shore distribution of short-wave height near the shore. A cali brated model was validated through the hindcast of an overtopping event observed under moderate swell forcing, and was used to map the overtopping exposure during a hypothetical combination of an energetic swell with a water level having a return period of ~70 years. Compared to the default wave spectra shape and model settings, using an appropriate representation of the short-wave directional spectrum at the open boundary was necessary to reproduce the observed overtopping extent. Refining the cross-shore resolution of the model helped to better represent the observed inundation extents, as also did the reduction of the friction coefficient. Addi tional phase-resolving simulations in 1DH overestimated IG wave energy and produced higher and more frequent overtopping discharges. The differences with the calibrated 2DH surfbeat model increased with the proximity of the inlet and with short-wave height and angle of incidence. Overall, required calibration steps were provided. They aim at making 2DH XBeach surfbeat a credible tool for 1) predicting short and IG wave characteristics up to the shoreline, as well as for 2) providing first estimates of exposure to overtopping in areas with shallow and alongshore-irregular morphologies.
Ano: 2023
Número Páginas:
1-21pp.
Autor(es): Freire, P.; Baptista, P.; Silva, P. A.; Henriques, M.; Azevedo, A.; Oliveira , F.; Fortunato, A. B.; Nahon, A.
Revista: Coastal Engineering
Editor: Elsevier B.V.
Volume:
184.
Keywords: XBeach; Infragravity waves; Ebb-tidal delta; Intermediate beach; Overtopping
Info
A ciência é do povo? Citizen science, reflexões sobre o conceito e os processos científicos da produção da verdade num mundo cada vez mais inseguro
À medida que as ameaças ambientais se multiplicam à escala global exige-se uma mais apurada reflexividade sobre as práticas humanas, as formas de utilização dos territórios e seus recursos e a capacidade de previsão e resposta quanto a eventos ambientais extremos, socialmente disruptivos. Ora, é esta capacidade de previsão que a ciência experimenta em uma dimensão cada vez menos segura, entrando em crise os modelos causais e a pertinência do conhecimento empírico baseado em observações do passado, pois o futuro torna-se progressivamente mais incerto e ameaçador. Incerteza e ameaça que se antecipam em cada crise, sob a manifestação dos riscos ambientais [1]. Algumas destas manifestações tornam-se indetetáveis para os sentidos humanos, a não ser pela própria visibilidade das consequências. As comunidades humanas encontram-se, assim, cada vez mais dependentes da análise e do discurso da ciência para perceberem (mesmo que na impossibilidade de compreenderem com exatidão os mecanismos de exposição) os riscos a que estão expostas. A humanidade parece, pois, acossada numa estrutura medieval do medo, o medo do invisível, na emergência de um novo tipo de sociedade colonizada pelo medo e que dá lugar a todas as derivas políticas [2]....
Ano: 2023
Autor(es): Craveiro, J.
Revista: Plataforma Barómetro Social
Editor: Instituto de Sociologia da Universidade do Porto
Keywords: Citizen Science.; Participação; Riscos ambientais
Info
A comprehensive performance assessment system for diagnosis and decision-support to improve water and energy efficiency and its demonstration in Portuguese collective irrigation systems.
In regions with a strong seasonal or interannual asymmetry in the distribution of precipitation and higher frequency of droughts, collective irrigation systems are vital infrastructures for agricultural activity. Although operating for decades, several systems have ageing infrastructures, with relevant water losses and pumping energy inefficiencies. Consequently, the systems are not adequately designed or operated to meet current and future water demand. Therefore, rehabilitation to improve water and energy efficiency while ensuring infrastructure, economic sustainability and service quality is crucial. In this sense, comprehensive approaches using performance assessment to support the planning process or benchmarking between water users associations play an essential role in improving efficiency in collective irrigation systems.
Ano: 2023
Número Páginas:
15p..
Autor(es): Alegre, H.; Cordeiro, D.; Arranja, C.; Moreira, M.; Beceiro, P.; Loureiro, D.
Revista: Agricultural Water Management
Editor: Elsevier
Volume:
Vol- 275.
Keywords: Water Users Association; Water and energy efficiency; Performance assessment system; Decision support; Diagnosis; Collective irrigation systems
Info
A European and Brazilian cross-national investigation into the Portuguese translation of soundscape perceptual attributes within the SATP project
This paper presents a cross-national investigation into the soundscape perceptual attributes translation from English into European and Brazilian Portuguese. It is a study within the scope of a larger project
Ano: 2023
Autor(es): Ribeiro, L. C.; Alves, S.; Carvalho, M. L. U.; Michalski, R.; Antunes S.
Revista: Applied Acoustics
Editor: Elsevier
Volume:
Vol. 211.
Keywords: ISO/TS 12913-2:2018; Translation Cross-national; Soundscape attributes
Info
A RANS-based Numerical Model to Simulate Overtopping-type Wave Energy Converters Integrated into Breakwaters
This study aims to validate a numerical model based on Reynolds-averaged Navier
Ano: 2023
Número Páginas:
420
Autor(es): Teixeira, P.; Didier, E.
Revista: International Journal of Offshore and Polar Engineering
Editor: IJOPE
Volume:
Vol 33 Nº 4.
Keywords: Turbulence models; Numerical wave flume; RANS; Wave energy; Overtopping wave energy converter
Info
Aerodynamic characterization of the 516 Arouca Pedestrian suspension Bridge over the Paiva River
Given the 516 Arouca pedestrian suspension bridge
Ano: 2023
Número Páginas:
18 pp.
Autor(es): Marques da Silva, F.
Revista: Wind
Editor: MDPI
Volume:
3.
DOI:
10.3390/wind3010006
Keywords: wind tunnel; wind loading; suspended bridges
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