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Avaliação da segurança de edifícios existentes de betão armado de acordo com a norma NP EN 1998-3 (EC8-3)
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| 7.96 MB | Adobe PDF |
Advisor(s)
Abstract(s)
Portugal é um país de alto risco sísmico e parte do seu edificado foi construído antes da
existência de regulamentação sísmica rigorosa. Perante este enquadramento, a avaliação da
segurança sísmica de edifícios já existentes torna-se fundamental para identificar possíveis
vulnerabilidades e propor intervenções de reforço.
A presente dissertação pode ser dividida em duas fases: a exposição das metodologias
aplicáveis para a análise da vulnerabilidade sísmica e a aplicação do EC8-3 a um caso de estudo.
Existem quatro metodologias de avaliação sísmica: os Métodos I e II, de carácter expedito, o
Método III que corresponde ao procedimento de referência, definido no Eurocódigo 8 - parte
3, e o Método IV que adota uma abordagem probabilística do risco sísmico.
Para A aplicação da metodologia do EC8-3, recorreu-se a um edifício de classe de importância
III. De seguida, procedeu-se à caracterização estrutural do edifício com base no relatório de
inspeção disponibilizado, de modo a obter os parâmetros necessários para a modelação
numérica. Posteriormente, procedeu-se à análise estática não linear (pushover), recorrendo ao
software SeismoStruct, que considera a não-linearidade geométrica e a inelasticidade dos
materiais. Esta abordagem permitiu comparar as exigências com a capacidade do edifício,
identificando as suas vulnerabilidades.
Portugal is a country of high seismic risk, and part of its buildings were constructed before strict seismic regulations were in place. Knowing this makes the evaluation of seismic safety of existing buildings essential to identify possible vulnerabilities and propose reinforcement measures. This dissertation can be divided into two phases: the presentation of methodologies applicable to seismic vulnerability analysis and the application of EC8-3 to a case study. There are four seismic assessment methodologies: Methods I and II, which are expedited, Method III, which corresponds to the reference procedure defined in Eurocode 8 - part 3, and Method IV, which adopts a probabilistic approach to seismic risk. For the application of the EC8-3 methodology, a class III importance building was used. Afterwards, the structural characterisation of the building was carried out based on the inspection report provided, in order to obtain the necessary parameters for numerical modelling. Subsequently, a non-linear static analysis (pushover) was performed using SeismoStruct software, which considers geometric non-linearity and material inelasticity. This approach made it possible to compare the demands with the capacity of the building, identifying its vulnerabilities.
Portugal is a country of high seismic risk, and part of its buildings were constructed before strict seismic regulations were in place. Knowing this makes the evaluation of seismic safety of existing buildings essential to identify possible vulnerabilities and propose reinforcement measures. This dissertation can be divided into two phases: the presentation of methodologies applicable to seismic vulnerability analysis and the application of EC8-3 to a case study. There are four seismic assessment methodologies: Methods I and II, which are expedited, Method III, which corresponds to the reference procedure defined in Eurocode 8 - part 3, and Method IV, which adopts a probabilistic approach to seismic risk. For the application of the EC8-3 methodology, a class III importance building was used. Afterwards, the structural characterisation of the building was carried out based on the inspection report provided, in order to obtain the necessary parameters for numerical modelling. Subsequently, a non-linear static analysis (pushover) was performed using SeismoStruct software, which considers geometric non-linearity and material inelasticity. This approach made it possible to compare the demands with the capacity of the building, identifying its vulnerabilities.
Description
Keywords
Seismic vulnerability Pushover SeismoStruct Eurocode 8 part 3 Vulnerabilidade sísmica Eurocódigo 8 parte 3