Artigos de Revista
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Artigos de Revista
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AmarraÆo de navios nos terminais do porto de Sines em situaäes de tempestade
Este trabalho descreve a aplicaÆo do sistema SAFEPORT no Porto de Sines, e em particular, o teste de uma das funcionalidades do sistema relacionada com otimizaÆo de operaäes mar¡timas em ambiente portu rio. O SAFEPORT um sistema de previsÆo e alerta de perigosassociados a navegaÆo.A aplicaÆo do sistema SAFEPORT permitiu a otimizaÆo dos esquemas de amarraÆo de trs navios distintos acostados em trs terminais do Porto de Sines, sob as condiäes de agitaÆo mar¡tima provocadas pela tempestade Dora (4 de dezembro de 2020). Foram constru¡dos os modelos dos trs navios e analisados v rios esquemas de amarraÆo a fim de obter uma soluÆo ¢tima para cada navio. Este exerc¡cio mostrou que o sistema SAFEPORT uma ferramenta £til para apoio
decisÆo nos sistemas de amarraÆo dos navios. A configuraÆo dos cabos de amarraÆo tem grande influncia no comportamento, e consequentemente na segurana, dos navios amarrados sujeitos a situaäes de tempestade.
Ano: 2022
Autor(es): Fortes, C. J. E. M.; Santos, J. A.; Pinheiro, L.; Gomes, A.
Editor: PIANC
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An estimation of the damage of scale models of breakwaters using the time of flight method
The assessment of damage evolution in scale model tests of rubble-mound breakwaters can be achieved by comparing eroded depths and volumes between consecutive surveys. Aiming to evaluate damage evolution on rubble-mound breakwater, scale model tests were recently conducted on the maritime hydraulic facilities of the National Laboratory for Civil Engineering. This paper focuses on the use of novel, non-intrusive survey methodologies such as the Time of Flight (ToF) principle technique. In this study, damage evaluation is based on the comparison of point clouds obtained before and after each test series, enabling the calculation of eroded depths and eroded volumes and the estimation of displaced units by using a non-dimensional damage parameter based on the eroded volume.
Ano: 2022
Número Páginas:
49-58pp..
Autor(es): Pinheiro, L.; Silva, L. G.; Fortes, C. J. E. M.; Lemos, R.
Revista: Revista Mecnica Experimental
Editor: APAET
Volume:
N§ 35, APAET (2022).
Keywords: Measuring Techniques; 3D Surveying; Breakwater; Stability
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Aplicação do modelo SWASH para a estimativa de galgamentos em eventos de tempestade no porto da Ericeira
Este trabalho analisa a potencialidade do modelo numrico SWASH ser implementado no prot¢tipo do sistema HIDRALERTA para o porto da Ericeira para a estimativa do galgamento.O modelo SWASH foi aplicado a dois perfis transversais do porto da Ericeira com caracter¡sticas geomtricas distintas, diferentes orientaäes face
agitaÆo incidente e com diferentes blocos de betÆo no manto principal. Esta comunicaÆo foca-se nos resultados para um perfil cujo manto principal constitu¡do por tetr podes. O coeficiente de Manning foi utilizado como parmetro de calibraÆo dos resultados do modelo SWASH, na simulaÆo de duas tempestades, tendo como referncia os resultados da ferramenta neuronal NN_OVERTOPPING2. Foram deduzidas trsexpressäes emp¡ricas para a determinaÆo do coeficiente de Manning com base em vari veis conhecidas, pois a possibilidade de calcular os valores dos coeficientes de Manning de forma autom tica essencial para que se possa implementar o modelo SWASH no sistema HIDRALERTA.
Ano: 2022
Autor(es): Garzon, J.L.; Z¢zimo, A. C.; Manz, A.
Editor: PIANC
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Application of Maxwell damping in the dynamic analysis of masonry structures with discrete elements
Discrete element models are widely used in the analysis of masonrystructures, as they provide an effective approximation of the observedbehaviour, namely for modelling collapse modes governed by thediscontinuities. Assessment of the response under earthquakes is an importantapplication of these models, which perform time domain dynamic analysisusing explicit algorithms. Rayleigh damping is generally used, but itsmass-proportional component has potential adverse effects, and the small stepsrequired by explicit solutions lead to large computational costs. An alternativedamping formulation employing Maxwell elements in parallel with the jointstiffness is proposed and tested. Problems involving linear elastic analysis ofcolumn bending, rocking of rigid blocks, and out-of-plane failure of masonrywalls under seismic loading are examined. The proposed damping approachdisplayed a sound mechanical performance and is computationally efficient.These early results justify further investigation of the technique for a broaderapplication in masonry structural dynamics.
Ano: 2022
Autor(es): Cheng, Z.; Dawson, E.; Lemos, J. V.
Revista: Int. J. Masonry Research and Innovation
Editor: Inderscience
Volume:
Vol. 7, No. 6.
Keywords: numerical modelling; structural dynamics; masonry
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Application of SWASH to Compute Wave Overtopping in Ericeira Harbour for Operational Purposes
This work aimed at testing the capability of the numerical model SWASH to be implemented in the prototype of the overtopping and flooding forecast system HIDRALERTA for Ericeira harbour. In contrast to the neural network NN_OVERTOPPING2, which is currently implemented in HIDRALERTA, SWASH is able to estimate the flood extension and wave propagation along the domain, which makes it a possible improvement to NN_OVERTOPPING2. The one-dimensional version of the SWASH model was implemented to simulate overtopping at two different profiles (antifer and tetrapods) and calibrated for three storms in 2019 by comparing the simulated overtopping discharge to NN_OVERTOPPING2 results. For the calibration, the Manning coefficient was used to represent the friction of the armour layer. Then, for operational purposes, four expressions to calculate the Manning coefficient were developed based on: the relative crest freeboard, the wave steepness, the incident wave angle and the type of armour layer. The expressions showed small errors between the calculated and calibrated Manning coefficients and highlighted the importance of the incident wave angle to obtain an accurate calibration. Despite an underestimation of the overtopping discharge in some cases, the SWASH model was found to provide overall good results when applied with calculated Manning coefficients and suitable to be implemented in HIDRALERTA.
Ano: 2022
Autor(es): Garzon, J.L.; Z¢zimo, A. C.; Manz, A.
Editor: PIANC
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Applying the SAFEPORT system in a storm situation
This paper presents an application of the SAPORT safety system. It consists of a forecast and early warning system for emergency situations related to navigation, berthing, and morning in port areas.
Ano: 2022
Autor(es): Santos, J. A.; Fortes, C. J. E. M.; Pinheiro, L.; Gomes, A.
Editor: Guedes Soares & Santos
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Argamassas com agregados reciclados de RCD submetidos a carbonataÆo forada. AvaliaÆo do seu comportamento em aplicaäes em suporte de tijolo.
A ind£stria da construÆo respons vel por um tero do total de res¡duos produzidos na EU. Atualmente, encontrar soluäes para a reutilizaÆo ou reciclagem destes res¡duos uma das maiores preocupaäes ambientais do sector. A substituiÆo de areia natural em materiais de construÆo, tais como betäes ou argamassas, por res¡duos de construÆo e demoliÆo (RCD) uma alternativa favor vel, j que aumenta o ciclo de vida dos res¡duos e reduz o uso de recursos naturais. Estes agregados, que em geral contm proporäes elevadas de materiais ciment¡cios, tm algum potencial de carbonataÆo e, portanto, capacidade para a captura de CO2. Ao serem incorporados, reduzem as emissäes deste g s para a atmosfera, contribuindo assim tambm para a neutralidade carb¢nica da ind£stria cimenteira e da construÆo em geral. Os RCD, em contacto com o CO2, reagem quimicamente atravs da carbonataÆo, o que expetavelmente contribui para o aumento da sua massa vol£mica e reduÆo da porosidade. Assim, estes novos agregados (RCD carbonatados) serÆo mais resistentes e menos absorventes, o que pode favorecer as propriedades das argamassas, em comparaÆo com os mesmos agregados reciclados nÆo carbonatados.
Ano: 2022
Número Páginas:
24-29pp..
Autor(es): Faria, P.; Infante Gomes, R.; Brito, J.; Veiga, M. R.; Farinha, C.; Pederneiras, C.
Revista: Pedra e Cal - Especial
Editor: Pedra e Cal
Volume:
N..§ 72.
Keywords: Captura e armazenamento de carbono; CarbonataÆo forada; Agregados reciclados; Argamassas de revestimento
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Assessing intermittent saline inflows in urban water systems
Urban water drainage systems' primary function is to transport sanitary or stormwater. The intrusion of saline waters has recognized detrimental effects. Especially in coastal areas, saline inflows can compromise performance by increasing the risk of untreated discharges, weakening the structural condition of concrete or metallic components, reducing the effectiveness of wastewater treatment processes and limiting the potential reuse for irrigation. Performance deterioration can be prevented by an early assessment of exposure to saline water, followed by timely actions to control its causes and consequences. The paper describes a procedure for diagnosing undue saline inflows. The procedure is based on the determination of saline inflow's magnitude, acceptance levels, and contribution to the system's performance. Contextual factors and performance indicators, and their reference values, are selected for the assessment. Options to address the problem are proposed, depending on the results. These options can relate to organizational, operational, and structural actions. Application to a case study allowed to validate the method and discuss the results. Here, saline volumes entering the system are quite relevant (almost 30%), posing problems regarding corrosion, treatment plant operation and significant concrete exposure to intermittent saline waters.
Ano: 2022
Número Páginas:
90103.
Autor(es): Brito, R.; Almeida, M. C.; Silva, N.; Barreto, S.; Veríssimo, F.
Revista: Water Science & Technology
Editor: IWA Publishing
Volume:
Volume 85, Issue 1.
Keywords: Undue inflow; Sewers; Saline water; Assessment
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Assessing robustness in multimodal transportation systems: a case study in Lisbon
Worldwide public transport systems are exposed to disruptions caused by malfunctions, accidents, maintenance, reduced feet, and disasters, compromising mobility. Transport networks
Ano: 2022
Número Páginas:
18p.
Autor(es): Henriques, R.; Arsenio, E.; Apar¡cio, J.
Editor: Springer
Volume:
14 (28).
Keywords: Smart mobility; Sustainable mobility; Robustness measurement; Multiplex networks; Transport resilience; Multimodality
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Assessment of the contribution of Nature-Based Solutions (NBS) to urban resilience: application to the case study of Porto
Nature-Based Solutions (NBS) provide a systemic approach to promote the maintenance, enhancement, and restoration of biodiversity and ecosystem services (ES) in urban areas, helping to enhance urban resilience in the water sector. Within the sustainable development goals proposed by UNHABITAT, resilience in cities was established as a critical issue. The assessment of the NBS contribution to urban resilience and the development of tools to determine the long-term value of these solutions comprise a most needed step forward.
Ano: 2022
Número Páginas:
34 pp..
Autor(es): Beceiro, P.; Brito, R.; Galvão, A.
Revista: Ecological Engineering
Editor: Elsevier
Volume:
Volume175.
Keywords: 1D-2D modelling; Urban resilience; Stormwater management and control; Resilience assessment framework (RAF); Nature-Based Solutions (NBS)
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