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Publication
Analysis of the seismic vulnerability of a masonry building
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Advisor(s)
Abstract(s)
A verificação da segurança sísmica dos edifícios existentes requer uma abordagem meticulosa
que engloba vários fatores-chave, tais como a definição de ações sísmicas adequadas, a modelação
precisa da estrutura, a utilização de métodos de análise adequados e a realização das verificações de
segurança necessárias. No entanto, a análise de edifícios de alvenaria existentes, com as suas
características únicas, vulnerabilidades e complexidades associadas a um conhecimento técnico
limitado sobre este tipo de construção, apresenta um desafio maior em comparação com estruturas
construídas mais recentemente aderentes à legislação aprovada.
Este artigo centra-se no desenvolvimento de uma análise de vulnerabilidade sísmica para um
edifício de alvenaria do século 19 construído no estilo pombalino, localizado em Lisboa. Foram
utilizados métodos de análise não lineares utilizando o programa de cálculo automático TREMURI, de
acordo com as recomendações específicas descritas no Anexo C do Eurocódigo 8, Parte 3, juntamente
com informações complementares do Anexo Nacional e publicações nacionais informativas.
A análise foi realizada permitindo a modelação tridimensional e a avaliação sísmica através de
análises estáticas lineares e não lineares. O modelo foi calibrado com base em testes no local
realizados, especificamente neste edifício. Foi realizada uma verificação de segurança abrangente,
considerando o estado limite final de danos graves.
Os resultados deste estudo fornecem informações valiosas sobre a modelagem e a
vulnerabilidade sísmica dos edifícios de alvenaria do século 19 em Lisboa, lançando luz sobre seu
comportamento estrutural e potenciais fraquezas. Através da utilização de técnicas de análise não
lineares e da adesão às disposições relevantes do código, obteve-se uma compreensão abrangente da
resposta do edifício às ações sísmicas. As soluções de reforço propostas visam aumentar a resiliência
do edifício e mitigar potenciais riscos associados a futuros eventos sísmicos.
Esta investigação contribui para o campo da engenharia sísmica, abordando os desafios
específicos associados à análise de edifícios de alvenaria existentes. Os resultados destacam a
importância de empregar métodos avançados de análise e considerar as características únicas das
estruturas históricas para garantir avaliações precisas de seu desempenho sísmico.
The verification of seismic safety for existing buildings requires a meticulous approach that encompasses several key factors, such as defining appropriate seismic actions, accurately modelling the structure, employing suitable analysis methods, and conducting necessary safety checks. However, the analysis of existing masonry buildings, with their unique characteristics, vulnerabilities, and complexities associated with limited technical knowledge on this construction type, presents a greater challenge compared to more recently built structures adhering to approved legislation. This paper focuses on the development of a seismic vulnerability analysis for a 19th century masonry building constructed in the Pombalino style, located in Lisbon. Nonlinear analysis methods were employed using the automatic calculation program TREMURI, in accordance with the specific recommendations outlined in Annex C of Eurocode 8, Part 3, along with complementary information from the National Annex and informative national publications. The analysis was carried out by enabling three-dimensional modelling and seismic evaluation through both linear and non-linear static analyses. The model was calibrated based on on-site tests conducted, specifically on this building. A comprehensive safety check was performed considering the ultimate limit state of severe damage. The results of this study provide valuable insights into both the modelling and the seismic vulnerability of the 19th century masonry buildings in Lisbon, shedding light on its structural behaviour and potential weaknesses. By employing nonlinear analysis techniques and adhering to relevant code provisions, a comprehensive understanding of the building's response to seismic actions was achieved. The proposed reinforcement solutions aim to enhance the building's resilience and mitigate potential risks associated with future seismic events. This research contributes to the field of seismic engineering by addressing the specific challenges associated with analysing existing masonry buildings. The findings highlight the importance of employing advanced analysis methods and considering the unique characteristics of historic structures to ensure accurate assessments of their seismic performance.
The verification of seismic safety for existing buildings requires a meticulous approach that encompasses several key factors, such as defining appropriate seismic actions, accurately modelling the structure, employing suitable analysis methods, and conducting necessary safety checks. However, the analysis of existing masonry buildings, with their unique characteristics, vulnerabilities, and complexities associated with limited technical knowledge on this construction type, presents a greater challenge compared to more recently built structures adhering to approved legislation. This paper focuses on the development of a seismic vulnerability analysis for a 19th century masonry building constructed in the Pombalino style, located in Lisbon. Nonlinear analysis methods were employed using the automatic calculation program TREMURI, in accordance with the specific recommendations outlined in Annex C of Eurocode 8, Part 3, along with complementary information from the National Annex and informative national publications. The analysis was carried out by enabling three-dimensional modelling and seismic evaluation through both linear and non-linear static analyses. The model was calibrated based on on-site tests conducted, specifically on this building. A comprehensive safety check was performed considering the ultimate limit state of severe damage. The results of this study provide valuable insights into both the modelling and the seismic vulnerability of the 19th century masonry buildings in Lisbon, shedding light on its structural behaviour and potential weaknesses. By employing nonlinear analysis techniques and adhering to relevant code provisions, a comprehensive understanding of the building's response to seismic actions was achieved. The proposed reinforcement solutions aim to enhance the building's resilience and mitigate potential risks associated with future seismic events. This research contributes to the field of seismic engineering by addressing the specific challenges associated with analysing existing masonry buildings. The findings highlight the importance of employing advanced analysis methods and considering the unique characteristics of historic structures to ensure accurate assessments of their seismic performance.