Papers
Info
Caracterização dinâmica de estruturas de pontes com base em ensaios de vibrações ambiente
Neste artigo apresentam-se inicialmente algumas considerações sobre ensaios dinâmicos in situ de estruturas, focando-se em especial a utilização de ensaios de vibrações ambiente para a avaliação das características dinâmicas de estruturas de pontes. São referidos vários trabalhos onde foram utilizados ensaios deste tipo. Descrevem-se em seguida dois estudos recentemente realizados pelo LNEC com vista à caracterização dinâmica da ponte da Arrábida na cidade do Porto e da ponte da Figueira da foz, apresentando-se o equipamento utilizado, as técnicas de ensaio e análise adotadas e os resultados obtidos.
Year: 1998
Number Pages:
35-50pp.
Author(s): Rodrigues, J.; Campos Costa, A.
: RPEE
Editor: LNEC
Volume:
Série I, nº 44.
Keywords: Pontes; Ensaio dinâmico in-situ
Info
Seismic hazard analysis in zones of time and space interdependence: An application to São Miguel Island, Azores
The Azores Islands are located in the mid-Atlantic region near the triple junction where the Euro-Asiatic-African-American plates join together. Seismic activity in the area is very high, as can be observed either from historical events since the fifteenth century, from present day microseismicity, and from direct and indirect measurements of recent tectonic deformation. Volcanic activity is also present throughout the region.All available information, even data exhibiting low quality, was used to develop hazard models of São Miguel Island. Source zones were established based on both the global tectonic behaviour of the region and on the local active fault structures. Recurrence laws for São Miguel Island, for which historical information seemed quite incomplete, were obtained from the large events in the entire archipelago and from their remarkable pattern of time and space dependence, and complimented by information on long-term fault deformation (for the longer recurrence periods) and on high precision instrumental network (for the very short recurrence periods).Attenuation laws were derived from data on events felt and/or recorded in the Island.Hazard maps were obtained through a modified version of McGuire's algorithm for several geometries of source areas and results compared with the maximum observed intensity of historical events.
Year: 1990
Number Pages:
15-29pp.
Author(s): Oliveira, C.S.; Campos Costa, A.; Nunes, J. C.; Forjaz, V.H.
: Natural Hazards
Editor: Springer
Volume:
Vol. 3, Issue 1.
DOI:
10.1007/BF00144971
Keywords: Time-space interdependence; Uncertainties; Zoning; Probability of exceedence; Recurrence; Hazard analysis
Info
Modelo histerético das relações forças-deslocamentos adequado à análise sísmica de estruturas
O presente relatório descreve os estudos efetuados no LNEC, que visaram o desenvolvimento e implementação computacional de um algoritmo representativo das relações histeréticas forças-deslocamentos generalizados observados em ensaios de elementos de betão armado sujeitos à flexão.Foi dado um carácter geral à implementação do modelo e, de forma a poder ser usado em trabalhos futuros de análise dinâmica em regime não linear de estruturas de betão armado, sujeitas à ação dos sismos. O algoritmo computacional resultante é suficientemente versátil uma vez que através da introdução de alguns parâmetros pode reproduzir diferentes comportamentos estruturais, tais como: degradação de rigidez e resistência, efeito de
Year: 1989
Number Pages:
35-48pp.
Author(s): Campos Costa, A.; Costa, A.
: RPEE
Editor: LNEC
Volume:
Série I, nº 29.
Keywords: Estruturas de betão; Regime não linear
|
Comunicação
Info
Avaliação da vulnerabilidade de estruturas e ensaios sísmicos
Apresenta-se uma abordagem para a avaliação de vulnerabilidade de estruturas com base em resultados experimentais obtidos em ensaios sísmicos, num contexto de análise de fragilidade para avaliação do risco sísmico. É proposta uma metodologia para obtenção da vulnerabilidade experimental de modelos ensaiados para níveis crescentes de excitação, e estimar a fragilidade com base em ensaios sísmicos.
Year: 1999
Number Pages:
95-106pp.
Author(s): Coelho, E.; Campos Costa, A.; Cansado Carvalho, E.; Luísa Sousa, M.
Editor: Universidade do Algarve
Volume:
Vol. 2.
Keywords: Ensaios sísmicos; Vulnerabilidade de estruturas
Info
Caracterização dinâmica experimental da ponte Miguel Torga
Nesta comunicação apresenta-se um estudo de caracterização dinâmica da Ponte Miguel Torga com base em ensaios dinâmicos in-situ. Estes ensaios foram efetuados antes da abertura da ponte ao tráfego tendo consistido na medição das vibrações induzidas pelo tráfego de camiões carregados. Descrevem-se as técnicas de análise dos registos de aceleração, apresentando-se as características dinâmicas da ponte identificadas a partir dessa análise.
Year: 1999
Number Pages:
551-562pp.
Author(s): Rodrigues, J.; Campos Costa, A.
Editor: Universidade do Algarve
Volume:
Vol.1.
Keywords: Caracterização dinâmica; Ponte Miguel Torga
Info
Contribuição para a revisão da ação sísmica em Portugal Continental no contexto do Eurocódigo 8
Desde a publicação em 1993 do regulamento português (RSA), onde são definidas as zonas sísmicas para o território e a respetiva ação, têm sido efetuados diversos estudos sobre casualidade e movimentos sísmicos intensos. É objetivo desta comunicação apresentar estudos recentes nesta matéria e os problemas encontrados com a aplicação do Eurocódigo 8 (EC-8), parte 1-1, para se dar inicio a uma oportuna revisão da regulamentação em vigor.
Year: 1999
Number Pages:
153-164pp.
Author(s): Oliveira, C.S.; Luísa Sousa, M.; Campos Costa, A.
Editor: Universidade do Algarve
Volume:
Vol.1.
Keywords: Zonamento sísmico; Eurocódigo 8
Info
Definição de ação sísmica no âmbito do documento nacional de aplicação (DNA) do Eurocódigo 8
Apresenta-se a proposta para o Documento nacional de Aplicação (DNA) elaborado de acordo com o disposto na Pré-Norma Europeia ENV 1998-1-1:1994, Eurocódigo 8
Year: 1999
Number Pages:
77-94pp.
Author(s): Cansado Carvalho, E.; Oliveira, C.S.; Campos Costa, A.; Luísa Sousa, M.
Editor: Universidade do Algarve
Volume:
Vol. 2.
Keywords: Zonamento sísmico; Dimensionamento sísmico
Info
A crise sísmica do Faial / Pico /São Jorge iniciada com o sismo de 9 de Julho de 1998 vista na rede acelerográfica dos Açores
Às 05h19m TUC do dia 9 de Julho de 1998 as ilhas do Grupo Central do Arquipélago dos Açores foram sacudidas por um forte sismo de magnitude md
Year: 1998
Number Pages:
6p.
Author(s): Oliveira, C.S.; Luísa Sousa, M.; Campos Costa, A.; Martins, A.; Correia Guedes, J.H.
Editor: APMG
Keywords: Rede acelerográfica; Sismo de 9 julho de 1998
Info
Experimental modal analysis of bridge structures: Case studies
The knowledge of the actual dynamic properties (natural frequencies, mode shapes and damping ratios) of bridge structures is extremely important to study the behavior of those structures in relation to seismic, wind or even traffic loads. Furthermore, the experimentally determined dynamic properties of a structure are an effective way to characterize its actual global behavior since they depend on its stiffness and mass distribution. The experimental modal analysis of bridges can be performed from the results of ambient vibration tests carried out on those civil engineering structures, with some advantages in relation to other types of in-situ dynamic tests. Ambient vibration tests have been recently conducted on two main bridges of the Portuguese roads network, a concrete arch bridge and a cable-stayed bridge. The tests carried out on the two bridges, the analysis techniques and the main results that were obtained are presented in this paper.
Year: 1998
Number Pages:
12p.
Author(s): Rodrigues, J.; Campos Costa, A.
Editor: Balkema, Rotterdam
Keywords: Bridge structures; Ambient vibration test; Modal analysis
Info
Experimental study of the behavior of masonry infilled RC frames under horizontal actions
This paper reports an experimental study aiming at the analysis of the behavior under horizontal actions of reinforced concrete frames infilled with different brick masonry walls, conducted at the Centre for studies and Equipment in Earthquake Engineering (C3ES) of the national Laboratory for Civil Engineering of Portugal (LNEC).Nine models, in a scale 2:3, were tested, named: two bare frames, four fully infilled frames and three infilled frames with a window opening. Two different horizontal histories of displacements under identical velocities were imposed at the level of the beam centerline: cyclic (six models) and monotonic (three models). Constant vertical forces were applied at the top of the columns in order to reproduce the effect of the upper floors of a building. The characteristics of the models, the test set-up and instrumentation and the testing procedure are reported. Some results of this experimental study are also presented and analysed.
Year: 1998
Number Pages:
12p.
Author(s): Pires, F.; Campos Costa, A.; Coelho, E.; Rodrigues, J.
Editor: University of Alberta and the Canadian Masonry Research Institute (CMRI)
Keywords: Reinforced concrete frames; Shaking table LNEC
Info
Experimental study of the behavior under horizontal actions of repaired masonry infilled R/C frames
This paper reports part of an experimental work conducted at LNEC/C3ES (Centre for Studies and Equipments in Earthquake Engineering) aiming at analyzing the behavior of R/C bare and infilled frames subjected to horizontal loads and the effectiveness of different repair procedures. Three models in a 2:3 scale were tested. One of these models was only a bare R/C frame and the other two were R/C frames fully infilled with brick masonry. In a first phase the models were tested under horizontal cyclic actions that caused severe damage in the infill walls and also some damage in the R/C frames. In a second phase the models were repaired and subjected again to horizontal cyclic actions. Different repair techniques were used for the two infilled models. The assessment of the models behavior, before and after repair, is presented in terms of strength, stiffness degradation, energy dissipation and failure mechanisms.
Year: 1998
Number Pages:
13p.
Author(s): Rodrigues, J.; Campos Costa, A.; Pires, F.
Editor: Balkema, Rotterdam
Keywords: Experimental tests; Masonry; Infilled frames; Repair techniques
Info
Seismic risk: Methods and application to Portugal
The object of this paper is to improve the probabilistic methodology to evaluate seismic losses in a given area, considering the randomness of the buildings vulnerability. Probabilistic methods for the evaluation of seismic losses are used taking into account both (i) the seismic hazard in the area and (ii) the seismic vulnerability of the existing stock of buildings. The distribution of losses is obtained convolving the probability distribution of seismic hazard (Beta distribution) with the conditional probability distribution of vulnerability, given a macroseismic intensity (Lognormal distribution), for a known stock of buildings. The above-described methodology is applied to the Portuguese continental country. The number of housing units per county as a function of the epoch of construction, available from the Portuguese Census 91 is the data base for the application of the model.
Year: 1998
Number Pages:
11p.
Author(s): Campos Costa, A.; Luísa Sousa, M.
Editor: Balkema
Keywords: Probable losses; Portugal; Vulnerabitlity; Seismic hazard; Seismic risk
Info
Shaking table tests on reinforced concrete infilled frames
This paper presents an experimental study on the behaviour of reinforced concrete infilled frames, carried out at the shaking table of the Centre for Earthquake Studies of LNEC, in Lisbon, within the 2nd phase of the European Programme ECOEST II, by request of the University of Patras. Five three-dimensional structures were tested, at real scale, with one storey and one bay in each of the two orthogonal directions of the horizontal plan. A biaxial seismic excitation was considered based on the adaptation of the records of two orthogonal horizontal components of the Patras 1993 earthquake, taking into account the inertial characteristics of the shaking table. The tests carried out are summarised, describing the test set-up and instrumentation, as well as the methodology used. The experimental results obtained are outlined and analysed.
Year: 1998
Number Pages:
12p.
Author(s): Coelho, E.; Campos Costa, A.; Rodrigues, J.
Editor: Balkema, Rotterdam
Keywords: Shaking table tests; Masonry infilled frames; Reinforced concrete
|
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
|