Papers
Info
Earthquake shaking scenarios for the metropolitan area of Lisbon
In this study, we simulate and compare ground motion shaking in the city of Lisbon and surrounding counties (metropolitan area of Lisbon (MAL)), using two possible earthquake models: the onshore source area of Lower Tagus Valley, M5.7 and M4.7 and the offshore source area, Marques de Pombal Fault, M7.6, one of the possible source of the 1755 Lisbon earthquake. The stochastic and a new hybrid stochastic-deterministic approach (DSM) are used in order to evaluate the ground shaking and to characterize its spatial variability. Results are presented in terms of response acceleration spectra (PSA) and peak ground acceleration (PGA) with respect to bedrock and surface. Site effects are evaluated by means of equivalent stochastic non-linear one-dimensional ground responses analysis, performed for a set of stratified soil profile units properly designed to cope with the soil site conditions of MAL region. A sensitive study is carried out using different input parameters and different approaches in order to give the basic information to evaluate the range of uncertainty in seismic scenarios.
Year: 2008
Number Pages:
347-364pp.
Author(s): Carvalho, A. M.; Zonno , G.; Franceschina, G.; Bilé Serra, J.; Campos Costa, A.
: Soil Dynamics and Earthquake Engineering
Editor: Elsevier
Volume:
Vol. 28, Issue 5.
Keywords: Metropolitan area of Lisbon; Local effects; Power spectral density function; Non-stationary random process; Deterministic-stochastic method; Response spectra; Ground motion simulation; Stochastic finite-fault modelling
Info
Earthquake shaking scenarios for the metropolitan area of Lisbon
In this study, we simulate and compare ground motion shaking in the city of Lisbon and surrounding counties (metropolitan area of Lisbon (MAL)), using two possible earthquake models: the onshore source area of Lower Tagus Valley, M5.7 and M4.7 and the offshore source area, Marques de Pombal Fault, M7.6, one of the possible source of the 1755 Lisbon earthquake. The stochastic and a new hybrid stochastic-deterministic approach (DSM) are used in order to evaluate the ground shaking and to characterize its spatial variability.Results are presented in terms of response acceleration spectra (PSA) and peak ground acceleration (PGA) with respect to bedrock and surface. Site effects are evaluated by means of equivalent stochastic non-linear one-dimensional ground responses analysis, performed for a set of stratified soil profile units properly designed to cope with the soil site conditions of MAL region. A sensitive study is carried out using different input parameters and different approaches in order to give the basic information to evaluate the range of uncertainty in seismic scenarios.
Year: 2008
Number Pages:
347-364.
Author(s): Carvalho, A. M.; Zonno , G.; Franceschina, G.; Bilé Serra, J.; Campos Costa, A.
Editor: Elsevier
Volume:
28.
Keywords: Ground motion simulations; Stochastic finite-fault modelling
Info
Experimental dynamic behavior of free-standing multi-block structures under seismic loadings
This article describes the dynamical behavior of free-standing block structures under seismic loading. A comprehensive experimental investigation has been carried out to study the rocking response of four single blocks of different geometry and associations of two and three blocks. The blocks, which are large stones of high strength blue granite, were subjected to free vibration, and harmonic and random motions of the base. In total, 379 tests on a shaking table were carried out in order to address the issues of repeatability of the results and stability of the rocking motion response. Significant understanding of the rocking motion mechanism is possible from the high quality experimental data. Extensive experimental measurements allowed to discuss the impulsive forces acting in the blocks and the three-dimensional effects presented in the response.
Year: 2008
Number Pages:
953-979pp..
Author(s): Campos Costa, A.; Lourenço, P.; Peña, F.
: Journal of Earthquake Engineering
Editor: Taylor & Francis
Volume:
Vol. 12.
Keywords: Multi-block structures; Rigid bodies; Rocking motion; Dynamics; Earthquakes
Info
Stone masonry in historical buildings. Ways to increase their resistance and durability
Stone masonry in historical buildings. Ways to increase their resistance and durability
Year: 2008
Number Pages:
2194-2205pp.
Author(s): Bairrão, R.
Editor: Engineering Structures Journal, Elsevier
Volume:
vol 30.
Keywords: Stone masonry; Polymer grids; Fibre mortars; Seismic tests
Info
On the dynamics of rocking motion of single rigid-block structures
This paper describes the behavior of single rigid-block structures under dynamic loading. A comprehensive experimental investigation has been carried out to study the rocking response of four blue granite stones with different geometrical characteristics under free vibration, and harmonic and random motions of the base. In total, 275 tests on a shaking table were carried out in order to address the issues of repeatability of the results and stability of the rocking motion response. Two different tools for the numerical simulations of the rocking motion of rigid blocks are considered. The first tool is analytical and overcomes the usual limitations of the traditional piecewise equations of motion through a Lagrangian formalism. The second tool is based on the discrete element method (DEM), especially effective for the numerical modeling of rigid blocks. A new methodology is proposed for finding the parameters of the DEM by using the parameters of the classical theory. An extensive comparison between numerical and experimental data has been carried out to validate and define the limitations of the analytical tools under study.
Year: 2007
Number Pages:
2383
Author(s): Campos Costa, A.; Lourenço, P.; Lemos, J. V.; Peña, F.; Prieto, F.
: Earthquake Engineering & Structural Dynamics
Editor: John Wiley & Sons Ltd
Volume:
Vol. 36, Issue 15.
DOI:
10.1002/eqe.739
Keywords: Rocking motion; Dynamics; Gid blocks
Info
Caracterização do parque habitacional de Portugal Continental para estudos de risco sísmico
A caracterização do parque habitacional existente em Portugal Continental no que respeita à sua vulnerabilidade sísmica e a sua classificação em tipologias construtivas são os principais objetivos do presente artigo.Esta caracterização e classificação estão enquadradas num estudo de âmbito mais vasto que é o de avaliação do risco sísmico de Portugal Continental [Sousa,2005] que, por sua vez, requer o conhecimento prévio da vulnerabilidade sísmica do seu parque habitacional.Neste contexto, apresenta-se o panorama da construção existente em Portugal Continental, caracteriza-se e evolução das práticas construtivas ao longo do tempo, identificam-se os principais tipos de construção que subsistem e se praticam no Continente, descrevem-se, de forma sumária, os respetivos sistemas estruturais, mencionando as suas principais vulnerabilidades face à ação dos sismos (entendidas como as deficiências do seu desempenho sísmico), e tipificam-se as soluções construtivas mais correntes enquadrando-as nas tipologias identificadas no Censos 2001.
Year: 2006
Number Pages:
35-50pp.
Author(s): Luísa Sousa, M.; Oliveira, C.S.; Campos Costa, A.
: RPEE
Editor: LNEC
Volume:
Série I, nº 55.
Keywords: Tipologias construtivas; Avaliação do risco sísmico
Info
A Simplified Model to Estimate Natural Venilation Flows for Simple Dwelling Layouts
Apresenta-se um método expedito, baseado em ábacos, de estimativa de caudais de ventilação natural considerando as componentes eólica e térmica
Year: 2005
Number Pages:
353-362.
Author(s): Marques da Silva, F.; Saraiva, J.
: The International Journal of Ventilation
Editor: VEETECH
Volume:
Vol 3, nº4.
Keywords: método de cálculo; ventilação Natural
Info
Modelos Preditivos para a Ventilação Natural
Apresentam-se modelos preditivos para a ventilação natural, como contribuição para a redução de sistemas AVAC, mantendo a Qualidade do Ar Interior.
Year: 2005
Number Pages:
39-41.
Author(s): Pinto, M.; Marques da Silva, F.; Freitas, V.
: Construção Magazine
Editor: Engenho e Média, Lda
Volume:
nº14, 3º tri.
Keywords: ventilação natural
Info
Natural Ventilation Air Changes Rates Considering Atmospheric Turbulence
A ventilação natural requer a estimativa adequada dos caudais de ar em circulação, as taxas de renovação, função da velocidade do vento e da distribuição de pressão na envolvente. A turbulância atmosférica introduz perturbações neste processo simplificado induzindo variações na velocidade e direcção do vento, podendo dar origem a reversões do escoamento.
Year: 2004
Number Pages:
5-6.
Author(s): Marques da Silva, F.
: Construction Technology in Europe
Editor: BRE
Volume:
26.
Keywords: Turbulência; Ventilação
Info
Seismic hazard for the Central Group of the Azores Islands
Probabilistic seismic hazards maps have been prepared either for the archipelago of the Azores in general terms, or for the islands of the Central Group using updated seismic information for the region, including a revision of the earthquake catalogue for the period 1522-1998. Two different approaches were used: (i) a standard seismic source model and (ii) a semi-zonified source model based on spatially smoothed seismicity where no delineation of seismic sources is needed. Preliminary data point out that high PGA values were obtained for an area located to the west of the Central Group and for an area between Terceira and the São Miguel Islands. Deaggregation of hazard for some counties was evaluated and results are presented in terms of mean and modal values of magnitude and distance, showing that the main contributions to hazard in all counties are from close-in and not very severe earthquakes.
Year: 2001
Number Pages:
89-105pp.
Author(s): Carvalho, A. M.; Luísa Sousa, M.; Oliveira, C.S.; Nunes, J. C.; Campos Costa, A.; Forjaz, V.H.
: Bollettino di Geofisica Teorica ed Applicata
Editor: OGS
Volume:
Vol. 42, Nº 1-2.
Keywords: Azores; Probabilistic seismic hazards
|
Comunicação
Info
Vulnerability evaluation of residential buildings in Portugal
With the aim of evaluating the seismic vulnerability of residential buildings in Portugal, the classification of the Portuguese housing stock was possible on the basis of a National database published in 1991. The study herein reported, included in a National Project concerning the seismic risk mitigation in Portugal, deals with the analysis of the database that resulted in the establishment of the most current building types in seismic prone regions with higher urban concentrations. The paper presents a summary of the analysis of the statistics of the stock and its geographic distribution, and includes the classification of residential buildings into typological classes, which vulnerability is characterised through a HAZUS99-based methodology.
Year: 2002
Number Pages:
10p.
Author(s): Cansado Carvalho, E.; Coelho, E.; Campos Costa, A.; Luísa Sousa, M.; Candeias, P.
Editor: Elsevier
Keywords: Seismic risk mitigation; Evaluation of existing buildings; Seismic vulnerability
Info
Caracterização dinâmica e análise sísmica da Igreja do Mosteiro da Serra do Pilar
Nesta comunicação descreve-se o trabalho desenvolvido no estudo do comportamento sísmico da Igreja do Mosteiro da Serra do Pilar. A partir da modelação numérica tridimensional da igreja e da quantificação de parâmetros mecânicos e dinâmicos da estrutura, a análise sísmica foi realizada em duas fases de cálculo. Procedeu-se a um primeiro cálculo linear global da estrutura, seguido de um segundo cálculo da subestrutura dos arcos e colunas de apoio onde foi ativado o comportamento não-linear das juntas entre blocos e analisado o efeito resultante da aplicação de intensidades sísmicas crescentes.
Year: 2001
Number Pages:
277-290pp.
Author(s): Almeida, C.; Arêde, A.; Costa, A.; Campos Costa, A.; Rodrigues, J.
Editor: LREC
Keywords: Análise sísmica; Ensaios dinâmicos; Património; Modelação
Info
Casualidade sísmica do grupo central do Arquipélago dos Açores
No presente trabalho apresenta-se uma primeira reavaliação da casualidade sísmica das ilhas do Grupo Central do Arquipélago dos Açores, com o objetivo de se estabelecer um zonamento atualizado e mais detalhado para o Arquipélago.Este estudo foi efetuado com base na compilação de catálogos sísmicos históricos e instrumentais da região dos Açores, e num modelo de 9 grandes zonas de geração, utilizando duas metodologias: (i) a clássica e (ii) uma baseada na distribuição espacial da sismicidade. A geologia superficial das diferentes zonas urbanas foi classificada em três categorias (solo duro, solo intermédio e solo brando), de forma a ser contemplada nas leis de atenuação espectral publicadas na literatura.Comparam-se as duas metodologias e apresentam-se curvas de casualidade sísmica para as sedes de concelho das ilhas do Grupo Central e mapas de casualidade sísmica para um período de exposição de 50 anos e uma probabilidade de excedência de 10%.
Year: 2001
Number Pages:
171-184pp.
Author(s): Carvalho, A. M.; Luísa Sousa, M.; Oliveira, C.S.; Nunes, J. C.; Campos Costa, A.; Forjaz, V.H.
Editor: LREC
Keywords: Grupo central; Geologia superficial; Casualidade sísmica; Açores
Info
Classificação tipológica do parque habitacional de Portugal Continental para o estudo da sua vulnerabilidade sísmica
Com o objetivo de estudar a vulnerabilidade sísmica do parque habitacional de Portugal Continental, foi efetuado o seu levantamento com base no III Recenseamento Geral da Habitação e no XIII Recenseamento Geral da População levados a cabo pelo Instituto Nacional de Estatística em 1991. A análise do inventário de existências permitiu estabelecer a tipificação do parque habitacional português e classificar as tipologias construtivas mais correntes nas zonas de maior sismicidade e maior concentração urbana. Este estudo está incluído no âmbito do projeto
Year: 2001
Number Pages:
199-212pp.
Author(s): Cansado Carvalho, E.; Coelho, E.; Campos Costa, A.; Luísa Sousa, M.; Candeias, P.
Editor: LREC
Keywords: Mitigação do risco sísmico; Edifícios existentes; Tipologias construtivas; Vulnerabilidade sísmica
Info
Metodologias para a avaliação de perdas humanas em consequência de sismos
Um dos objetivos do projeto
Year: 2001
Number Pages:
157-170pp.
Author(s): Campos Costa, A.; Luísa Sousa, M.; Martins, A.; Castro, S.
Editor: LREC
Keywords: Risco sísmico; Perdas humanas; Sismo de 80 da Terceira; Metodologias
Info
Seismic hazard de-aggregation for the Central group of Azores Islands
Large seismic source zones and the modelling of epicentral location by the uniform probability distribution are two options that contribute to smoothed results in probabilistic seismic hazard studies. In order to obtain less smoothed results that reflect the geographical underlying seismic activity it was adopted an empirical distribution, based on the seismic catalogue, to model the random variable epicentral distance. This option avoid the outline of seismic sources in regions where seismogenic structures are poorly known and are the first step to estimate hazard de-aggregation at a site. The methodology was applied de-aggregating seismic hazard for all counties of the Central Group of Azores Archipelago. The relative contribution to the hazard of mean and modal values of magnitude and distance is tabulated for those counties aiming to identify the dominating events to the site. A de-aggregation plot for the county with the severest hazard is also presented, for different spectral periods.
Year: 2001
Number Pages:
241-250pp.
Author(s): Luísa Sousa, M.; Carvalho, A. M.; Campos Costa, A.
Editor: LREC
Keywords: Response spectra; Seismic hazard; Probabilistic seismic scenario; De-aggregation; Azores
Info
Assessment of experimental seismic response through damage evaluation
The paper presents a contribution for the assessment of experimental results obtained in seismic tests of structures in a context of fragility analysis for earthquake risk assessment. A methodology is proposed to estimate the vulnerability of specimens tested for increasing excitations, compensating for the damage accumulation in one same specimen (as opposed to the very expensive alternative of testing virgin specimens for each level of excitation). The method provides the damage evolution in relation to a
Year: 2000
Number Pages:
8p.
Author(s): Coelho, E.; Campos Costa, A.; Cansado Carvalho, E.
Editor: New Zeland Society for Earthquake Engineering
Keywords: Vulnerability; Seismic tests of structures
Info
Comportamento sísmico experimental de estruturas de betão armado reforçadas com dispositivos dissipadores
Apresenta-se um programa experimental realizado na plataforma sísmica do LNEC, em colaboração com a Universidade de Basilicata, no âmbito do projeto Europeu ECOEST II, cujo objetivo foi a aplicação de técnicas de controlo passivo, baseadas em sistemas de contraventamento com dissipadores, na reabilitação sísmica de estruturas existentes de betão armado.
Year: 2000
Number Pages:
649-658pp.
Author(s): Coelho, E.; Campos Costa, A.; Cansado Carvalho, E.; Ponzo, F.C.; Dolce, M.
Editor: LNEC
Keywords: Dissipadores de energia; Estruturas de betão armado reforçadas
Info
Definition of seismic action in the context of EC-8. Topics for discussion
The present paper summarises a few problems encountered with the application of the Eurocode 8 (EC-8), Parts 1-1 dealing with the definition of seismic action and zonation when preparing the National Document Application (NDA) in each European country. Points related to the representation of seismic action, the setting of return periods, the definition of spectral shapes and the possibility of use of more than one seismic scenario are among the most important topics presented. The Portuguese code, in action since 1983 [9], needs to be revised in what concerns seismic action in order to include recent studies on seismicity, seismic hazard and modelling of strong motion data. This revision, opportunely assessed in the context of the EC-8, brings up several of the topics above referred and shows the proposed solutions.
Year: 2000
Number Pages:
8p.
Author(s): Oliveira, C.S.; Campos Costa, A.; Luísa Sousa, M.
Editor: New Zeland Society for Earthquake Engineering
Keywords: Eurocode 8 (EC-8)
Info
Seismic risk mitigation in Portugal.
A project entitled
Year: 2000
Number Pages:
6p.
Author(s): Cansado Carvalho, E.; Coelho, E.; Campos Costa, A.; Luísa Sousa, M.; Candeias, P.; Massena, B.; Castro, S.
Editor: ELSA
Keywords: Vulnerability; Seismic risk; Seismic hazard; Design rules; Retrofitting; Portugal; Mitigation
|
Books
Info
Historical earthquake-resistant timber framing in the mediterranean area
This book presents a selection of the best papers from the HEaRT 2015 conference, held in Lisbon, Portugal, which provided a valuable forum for engineers and architects, researchers and educators to exchange views and findings concerning the technological history, construction features and seismic behavior of historical timber-framed walls in the Mediterranean countries. The topics covered are wide ranging and include historical aspects and examples of the use of timber-framed construction systems in response to earthquakes, such as the gaiola system in Portugal and the Bourbon system in southern Italy; interpretation of the response of timber-framed walls to seismic actions based on calculations and experimental tests; assessment of the effectiveness of repair and strengthening techniques, e.g., using aramid fiber wires or sheets; and modelling analyses. In addition, on the basis of case studies, a methodology is presented that is applicable to diagnosis, strengthening and improvement of seismic performance and is compatible with modern theoretical principles and conservation criteria. It is hoped that, by contributing to the knowledge of this construction technique, the book will help to promote conservation of this important component of Europe
Year: 2016
Number Pages:
468p.
Author(s): Cruz, H.; Saporiti Machado, J.; Campos Costa, A.; Candeias, P.; Catarino, J. M.
Editor: Springer
Volume:
Vol. 1.
Keywords: Heart 2015 Conference; Historic Masonry; Performance-based Assessment; Structural Health Monitoring; Timber-Framed Construction Systems; Seismic-Resistant Timber Frames; Historical Constructive Analysis; Historical Timber-Framed Walls
Info
Assessment of the seismic capacity of stone masonry walls with block models
The applications of discrete elements models based on rigid block formulations to the analysis of masonry walls under horizontal out-of-plane loading is simplified block pattern are addressed. Two procedures for creating irregular block systems are presented, one using Voronoi polygons, the other based on a bed and cross joint structure with random deviations. A test problem provides a comparison of various regular and random block patterns, showing their influence on the failure loads. The estimation of manual frequencies of rigid block models, and its application to static pushover analyses, is addressed. An example of application of rigid block model to wall capacity problem is presented.
Year: 2011
Number Pages:
221-236pp.
Author(s): Lemos, J. V.; Campos Costa, A.; Bretas, E. M.
: Computational Methods in Earthquake Engineering
Editor: Springer
Volume:
Vol. 21.
Keywords: RTigid blocks; Discrete elements; Seismic assessment; Masonry structures
Info
Earthquake disaster scenario prediction and loss modelling for urban areas
The overall aim of Sub-Project 10 (Earthquake disaster scenario predictions and loss modelling for urban areas) has been to create a tool, based on state-of-the-art loss modelling software, to provide strong, quantified statements about the benefits of a range of possible mitigation actions, in order to support decision-making by urban authorities for seismic risk mitigation strategies. A further larger aim has been to contribute to a seismic risk mitigation policy for future implementation at European level. Among the European cities for which loss estimation studies have been carried out are Istanbul, Lisbon and Thessaloniki, and tools, using GIS mapping, have been developed by research teams in each of these cities; these were made available for further development to examine mitigation strategies within SP10. Related research studies
Year: 2007
Number Pages:
180p.
Author(s): Campos Costa, A.; Carvalho, A. M.
Editor: IUSS Press
Keywords: Shaking scenarios
Info
European manual for in-situ assessment of important existing structures. LessLoss Sub Project 5-In-situ assessment, monitoring and typification of buildings and infrastructure
Much work in Earthquake Engineering was devoted to the improvement of earthquake resistant design of new structures. One European result is EN 1998, which will be in several years the main seismic code for all European countries. But it is well known, that older existing structures cause in many large earthquakes much more casualties and damages than new structures. It is certainly not possible to retrofit all existing structures, but agreement exists, that assessment and retrofit of safety - critical - structures and lifeline structures must have priority. In September 2004 the European Integrated Research Project LESSLOSS on Risk Mitigation for Earthquakes and Landslides was started. The project will run for three years and comprises 13 Sub-Projects (SP´s). The consortium consists of 46 partners (see http:\\www.lessloss.org). LESSLOSS SP5 is on In-situ Assessment, Monitoring and Typification of buildings and Infrastructure. The project partners of SP5 are ARS, CESI, LNEC, RWTH and VCE. This Sub Project focuses mainly on the assessment of important existing structures and tries to integrate experimental methods into the assessment procedure. The progress of SP5 obtained in the first year is summarized in this paper. Highlights presented by all partners are mentioned and the assessment of Hospital Innsbruck is presented in more detail. The most innovative task of LESSLOSS/ SP5 is Update of vulnerability estimates via monitoring, which was also started in the first year.
Year: 2007
Number Pages:
195p.
Author(s): Campos Costa, A.; Candeias, P.; Mendes, L.; Flesch, R.; Pellegrini, R.; Friedl, H.; Hoffmeister, B.; Oppe, M.; Veit-Egerer, R.; Wenzel, H.; Eusebio, M.
Editor: IUSS Press
Keywords: Structures; Earthquake
Info
Modal analysis from ambient vibration survey of bridges: LNEC experience
In order to study the behavior of bridge structures in relation to traffic, wind and seismic loads, it is extremely important to know their actual dynamic properties (natural frequencies, vibration mode shapes and damping). The experimentally identified dynamic properties of bridge structures are also an effective way to characterize their actual global structural behavior. Whether included in the reception load tests of recently built bridges, before they are opened to the traffic, or as part of the inspection works of bridges already in service, LNEC has performed modal analysis studies based on the results of ambient vibration tests. Some of the studies carried out recently in important bridges are reported in this paper.
Year: 1999
Number Pages:
712-718pp.
Author(s): Rodrigues, J.; Campos Costa, A.
: Proceedings of the 17th International Modal Analysis Conference : February 8 - 11, 1999 / IMAC XVII.
Editor: SEM
Volume:
Vol. 3727.
Keywords: Dynamic properties; Bridge structures
Info
O Sismo de Northridge, Los Angeles, de 17 Janeiro de 1994. Ensinamentos para Portugal.
O sismo de Northridge ocorreu na parte norte da área metropolitana de Los Angeles, Califórnia, às 4:31 h do dia 17 de janeiro, uma segunda-feira coincidente com dia de feriado nacional, tendo atingindo uma magnitude de 6.6 na escala de Richter. O número total de vítimas mortais cifra-se em 57, havendo para cima de 8 000 feridos e 20 000 desalojados.As estimativas de perdas totais, feitas em meados de fevereiro de 1994, apontavam para valores de 15 biliões de US dólares, tendo o Estado da Califórnia apresentado um impacto económico total de ordem dos 30 biliões de dólares, perto do valor do Orçamento Geral do estado Português para 1994. Os prejuízos infligidos na indústria e no comércio são também surpreendentemente elevados, exigindo longos períodos de interrupção das atividades económicas.
Year: 1995
Number Pages:
165p.
Author(s): Oliveira, C.S.; Costa, A.; Campos Costa, A.; Azevedo, J.; Delgado, R.M.
Editor: IST e FEUP
Keywords: Northridge earthquake; Earthquake effects
|
Capítulo de Livro
Info
Shaping favorable beliefs towards seismic protection through risk communication: A pilot-experience in two Lisbon schools (Portugal).
Communicating science within disaster risk reduction using methods that encourage two-way dialogue between scientists and laypersons is a challenging task. This paper aims at presenting a methodological strategy of communicating risk and non-structural seismic protection measures through participatory approach. Such methodological strategy is part of a pilot experience of risk communication in two schools in Lisbon (Portugal) under the EU project KnowRISK (Know your city, Reduce seISmic risK through non-structural elements). The efficacy of education for seismic safety is often inhibited by an incomplete understanding of the process by which individuals decide to protect themselves from harm (Becker JS, Paton D,Johnston DM, Ronan KR. Nat Hazards 64(1):107
Year: 2019
Number Pages:
445-458pp.
Author(s): Silva, D. S.; Vicente, M.; Pereira, A.; Candeias, P.; Ferreira, M.A.; Oliveira, C.S.; Bernardo, R.; Lopes, M.; Henriques, P.
: Proceedings of the International Conference on Earthquake Engineering and Structural Dynamics
Editor: Springer Link
Volume:
Volume 47.
Keywords: Non-structural; Protective behaviours; Risk communication; Seismic risk
Info
Characterization of timber masonry walls with dynamic tests
Most of the Lisbon 18th century timber-framed masonry
Year: 2018
Number Pages:
299-309pp.
Author(s): Gonçalves, A.; Candeias, P.; Guerreiro, L.; Ferreira, J.; Campos Costa, A.
: Historical earthquake-resistant timber framing in the mediterranean area
Editor: Springer
Volume:
Vol. 1.
Keywords: Shaking table tests; Timber-masonry walls;
Info
KnowRISK practical guide for mitigation of seismic risk due to non-structural components
Good performance of non-structural elements can be decisive in saving lives and costs when an earthquake strikes. The European project KnowRISK aims to educate and encourage households to take the necessary precautionary measures to protect people, houses, and contents. Preparedness and prevention act on community resilience. Within the KnowRISK project, the idea of a Practical Guide has been conceived suggesting seismic mitigation solutions for non-structural components to non-experts stakeholders. It is intended to guide people into the first steps of prevention in a straightforward manner, minimizing or avoiding injuries, damage, and long-term financial consequences. The novelty of the Guide belongs to his philosophy: a path through increasing challenges corresponds to a growing level of safety. The idea is that anyone can mitigate seismic risk in its own environment by adopting simple and low cost measures. The Practical Guide may contribute to increase risk awareness. This kind of initiatives if undertaken at larger scales may also enhance social resilience.
Year: 2018
Number Pages:
309-321pp.
Author(s): Ferreira, M.A.; Oliveira, C.S.; Lopes, M.; Musacchio, G; Candeias, P.; Vicente, M.; Silva, D. S.; O
: Proceedings of the International Conference on Earthquake Engineering and Structural Dynamics
Editor: Springer Link
Volume:
Volume 47.
Keywords: Practical guide; Community resilience; Preparedness; Non-structural elements
Info
Elastic and inelastic analyses of frames with a force-based higher-order 3D beam element accounting for axial-flexural-sheartorsional interaction
When one of the dimensions of a structural member is not clearly larger than the two orthogonal ones, engineers are usually compelled to simulate it with refined meshes of shell or solid finite elements that typically impose a large computational burden. The alternative use of classical beam theories, either based on Euler-Bernoulli or Timoshenko
Year: 2016
Number Pages:
109-128pp.
Author(s): Correia, A.A.; Almeida, J.P.; Pinho, R.
: Computational Methods in Applied Sciences
Editor: Springer
Volume:
Vol. 3.
Keywords: Inelastic response; Boundary conditions; Flexural-shear-torsional interaction; Higher-order; Force-based; Beam element
Info
A finite-fault modeling of the 1755 Lisbon earthquake sources
A non
Year: 2009
Number Pages:
433-454.
Author(s): Carvalho, A. M.; Campos Costa, A.; Sousa Oliveira, C.
Editor: L.A. Mendes-Victor et al. (eds)
Keywords: Earthquake scenarios; Finite-fault modeling
Info
Simulating earthquake scenarios in the european project Lessloss: the case of Lisbon
N/A
Year: 2009
Number Pages:
233-243.
Author(s): Zonno, G.; Carvalho, A. M.; Franceschina, G.; Akinci, A.; Campos Costa, A.; Coelho, E.; Cultrera, G.; Pacor, F.; Pessina, V.; Cocco, M.
Editor: L.A. Mendes-Victor et al. (eds)
Keywords: Earthquake scenarios
Info
Shaking table testing
This text reflects the first of the four lectures that the author has presented at Udine, Italy, at CISM
Year: 2008
Number Pages:
165-196pp.
Author(s): Bairrão, R.
Editor: Springer Verlag
Keywords: Shaking table testing
|
Tese de Doutoramento
Info
Modelos estocáticos para a caracterização da acção sísmica em Portugal Continental
Um dos principais problemas e interesses da engenharia sísmica é a caracterizaçãoda acção sísmica, envolvendo a estimativa da intensidade, conteúdo em frequência,duração e variabilidade espacial dos movimentos intensos do solo mais gravosos, emtermos dos seus efeitos nas estruturas, que pode ocorrer num local.O presente trabalho de investigação desenvolve e aplica a metodologia estocástica etécnicas de modelação de fonte
Year: 2009
Author(s): Carvalho, A. M.
Keywords: Portugal continental; Risco sísmico; Fonte sísmica; Modelos estocásticos; Acção sísmica
Info
Risco sísmico em Portugal Continental
Os sismos são encarados frequentemente como desastres naturais inevitáveis. Todavia,deveriam ser considerados fenómenos naturais, cujos efeitos adversos podem ser minimizadoscaso se proceda a uma gestão efectiva do risco sísmico.O objectivo principal do presente trabalho de investigação é o de avaliar o risco sísmicoem Portugal Continental.Sendo um tema de natureza multidisciplinar, apresentam-se e discutem-se modelos deavaliação probabilística da perigosidade sísmica e sua desagregação, de vulnerabilidade efragilidade sísmicas de tipologias construtivas, de danos e de perdas económicas e humanas.Aplica-se a análise probabilística da perigosidade sísmica, e sua desagregação, aPortugal Continental, obtendo-se cenários modais capazes de reproduzir os níveis deperigosidade que os condicionam. Apresenta-se o inventário do parque habitacional e seushabitantes, descriminado por factores de vulnerabilidade, e classifica-se a sua vulnerabilidadesegundo os modelos de dano. Procede-se à actualização e aferição de uma metodologia parasimulação de cenários sísmicos, integrada num Sistema de Informação Geográfico. Avalia-seo risco sísmico, seguindo diversas abordagens, comparando-se os resultados com o risco deoutros países.Construiu-se assim uma ferramenta de avaliação de perdas devidas a sismos, queconstitui uma primeira contribuição para o desenvolvimento de um processo de gestão dorisco sísmico aplicado ao Continente Português.
Year: 2009
Author(s): Sousa, M. L.
Info
Avaliação da vulnerabilidade sísmica de edifícios de alvenaria
O parque habitacional de Portugal Continental contém algumas tipologias construtivas deelevada vulnerabilidade sísmica em relação às quais urge actuar no sentido de reduzir o riscosísmico a elas associado. No projecto de investigação
Year: 2008
Author(s): Candeias, P.
Keywords: Reforço sísmico; Vulnerabilidade sísmica; Ensaios sísmicos; Edifícios
|
Relatório Científico
Info
LNEC-SPA, signal processing and analysis tools for civil engineers - Version 1.0
N/A
Year: 2007
Number Pages:
78pp.
Author(s): Mendes, L.; Campos Costa, A.
Info
Loss estimations for a reference situation
This report addresses the National Laboratory for Civil Engineering (LNEC) participation in Subproject 10 Earthquake disaster scenario predictions and loss modelling for urban areas. More precisely this report was developed in order to accomplish the 24 months LESSLOSS deliverable nº 85, which achieves loss estimates for the Metropolitan Area of Lisbon (MAL), for pre-defined scenarios earthquake. These loss estimations represent the reference situation to be compared with revised loss estimates after implementing mitigation actions with the ultimate goal of being established, in the next deliverable, the
Year: 2007
Author(s): Campos Costa, A.; Luísa Sousa, M.; Carvalho, A. M.
Keywords: Risk mitigation for earthquakes
Info
Loss estimations for a reference situation - Application to Lisbon Metropolitan Area
N/A
Year: 2007
Number Pages:
54pp.
Author(s): Campos Costa, A.; Sousa, M. L.; Carvalho, A. M.
Info
RELATÓRIO DE ACTIVIDADE DO PROJECTO USUET
N/A
Year: 2007
Number Pages:
60pp.
Author(s): Sousa, M. L.; Afonso, N.
Info
Enhancing seismic resistance and durability of natural masonry stone- Construction and 1st phase of the experimental program
The present report describes the construction of a model in limestone masonry for the user Group 3 oh the ECOLEADER Project, led by IRIDEX Construction Group, and the first phase of the experimental program developed in LNEC. The description of the construction, a photographic report and the results obtained on the characteristics tests made on the mortars used in the construction are presented.The construction was carried out by contractor José dos Santos Paixão on the basics of model details and materials specifications proposed by the User group 3, being NESDE/LNEC responsible for the guidance and supervision of the works.
Year: 2006
Author(s): Falcão Silva, M. J.; Candeias, P.; Campos Costa, A.; Bairrão, R.
Keywords: Ecoleader; Limestone masonry
Info
Shaking table tests of a reinforced concrete precast building system.
This report describes the first phase activity of the Portuguese group in the Precast Structures EC8 research projet. The Portuguese group is composed by Laboratório Nacional de Engenharia Civil (LNEC) and the Civibral, S.A. Precast Company.In this phase, seismic test were made in the LNEC
Year: 2006
Author(s): Mendes, L.; Coelho, E.; Campos Costa, A.
Keywords: Reinforced concrete; Shaking table tests
Info
Building stock inventory and vulnerability data for Lisbon Metropolitan Area
The present report addresses the first twelve months of LNEC participation in LESSLOSS
Year: 2005
Author(s): Campos Costa, A.; Luísa Sousa, M.; Coelho, E.
Keywords: Risk mitigation for earthquakes; Vulnerability
Info
Dinámica de bloques de piedra.
The dynamics of rigid bodies was studies by long time, because this phenomenon is important in the seismic security of some types of structures. However, there are few experimental studies. This job shows the experimental test carried out at the Laboratório Nacional de Engenharia Civil (LNEC) of Portugal. Four blue granites stones were tested, each one with different geometrical characteristics, under harmonic and random motions.A numerical simulation was carried out with the Discrete Element Method (DEM). This method has shown to be a good tool in the study of the dynamics of rigid bodies. It was proposed a new methodology to find the parameters of the DEM by using the parameters of classical theory.
Year: 2005
Author(s): Peña, F.; Campos Costa, A.; Lemos, J. V.
Keywords: Discrete Element Method (DEM); Dynamics of rigid bodies
Info
Seismic risk mitigation options and actions to be studied for Lisbon Metropolitan Area
The project LESSLOSS
Year: 2005
Author(s): Luísa Sousa, M.; Coelho, E.; Campos Costa, A.
Keywords: Seismic risk mitigation; Lisbon Metropolitan Area
|
Outro
Info
Sensibilidade climática, capacidade adaptativa e de vulnerabilidades atuais e futuras da AML
Análise dos registos históricos de eventos climáticos e o seu impacto no setor da energia da AML, para identificar o grau em que este setor foi afetado por estímulos relacionados com o clima. Avaliação de capacidades adaptativas.
Year: 2019
Author(s): Marques da Silva, F.; Pinto, A.; Machado, P.
Keywords: Energia; Alterações climáticas
Info
A propósito da forma na engenharia do vento
Análise da forma das edificações nas ações do vento
Year: 2018
Author(s): Marques da Silva, F.
Keywords: Engenharia do vento; Aerodinãmica
Info
Forma e desenho urbano - efeitos na ventilação
As condicionantes arquitetónicas e de urbanização na ventilação natural
Year: 2018
Author(s): Marques da Silva, F.
Keywords: Engenharia do vento; Ventilação
Info
Wind and structures
Caracterização do vento. Ações sobre estruturas. Ensaios em túnel de vento
Year: 2017
Author(s): Marques da Silva, F.
Keywords: Wind tunnel; Actions on structures; Wind engineering
|