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Authors
Advisor(s)
Abstract(s)
Nesta dissertação é modelada através do software ABAQUS a Viga A2
previamente ensaiada por Bernardo em 2003 e modelada por Ferreira em 2016. Tratase de uma viga em caixão de betão armado (com secção transversal retangular vazada)
sujeita à torção pura até à rotura. No modelo apresentado nesta dissertação, designado
de modelo modificado, foram realizadas várias alterações de forma a obter resultados
mais satisfatórios. Para tal, a implementação deste modelo segue o regime de uma
análise não linear com elementos finitos, recorrendo ao software comercial ABAQUS.
Precedente à realização desta dissertação, foi necessário estudar todo o processo
realizado por Bernardo em 2003, relativo ao ensaio experimental realizado, bem como
todo o processo antecedente e de tratamento de dados.
Foi realizado e apresentado nesta dissertação todo o procedimento de modelação
da Viga A2 através do software comercial ABAQUS, de forma a demonstrar passo a passo
toda a modelação da Viga A2 com o modelo modificado. Posteriormente, foram
realizadas comparações com o modelo implementado por Ferreira em 2016, bem como
com os resultados experimentais obtidos por Bernardo em 2003.
Após a modelação e calibração do modelo modificado da Viga A2, foram
realizadas alterações na geometria da secção do modelo, com o intuito de estudar o
comportamento da Viga A2 nestas novas configurações. Desta forma, foi alterada a
espessura das paredes da secção retangular vazada do modelo, bem como foram
adicionados banzos laterais de diferentes larguras. Por fim, realizaram-se comparações
dos resultados obtidos com as cláusulas relacionadas e estabelecidas em algumas
normas/códigos de referência, verificando que os resultados obtidos neste trabalho
validam os mesmos.
In this dissertation, beam A2 is numerically modeled using software ABAQUS. This beam was initially tested by Bernardo in 2003 and modeled by Ferreira in 2016. Beam A2 is a reinforced concrete beam, a box beam (with hollow rectangular cross section), under pure torsion until failure. In the model presented in this dissertation, named ad modified model, several changes were made in order to obtain more satisfying results. For this, to implement the modela nonlinear analysis with finite elements by using the commercial software ABAQUS was used. To perform this work, it was necessary to study all the process performed by Bernardo in 2003 and related with the experimental testing, and also all the precedent process and data treatment. Besides that, in this dissertation, all the modeling process of beam A2, using the commercial software ABAQUS, was realized and presented with the purpose to demonstrate, step by step, with the implementation of the modified model. In the end, the obtained results were compared with the ones from model implemented by Ferreira in 2016, as well with the experimental results by Bernardo in 2003. After the modeling and calibration of the modified model of beam A2, some geometrical changes were incorporated into the cross section of the model with the aim to study the new behavior of beam A2. For this, the thickness of the walls of the hollow rectangular section was changed. Also, lateral flanges with different widths were added. The new results were compared with some related standards/codes rules existents in the literature, were good agreement was found.
In this dissertation, beam A2 is numerically modeled using software ABAQUS. This beam was initially tested by Bernardo in 2003 and modeled by Ferreira in 2016. Beam A2 is a reinforced concrete beam, a box beam (with hollow rectangular cross section), under pure torsion until failure. In the model presented in this dissertation, named ad modified model, several changes were made in order to obtain more satisfying results. For this, to implement the modela nonlinear analysis with finite elements by using the commercial software ABAQUS was used. To perform this work, it was necessary to study all the process performed by Bernardo in 2003 and related with the experimental testing, and also all the precedent process and data treatment. Besides that, in this dissertation, all the modeling process of beam A2, using the commercial software ABAQUS, was realized and presented with the purpose to demonstrate, step by step, with the implementation of the modified model. In the end, the obtained results were compared with the ones from model implemented by Ferreira in 2016, as well with the experimental results by Bernardo in 2003. After the modeling and calibration of the modified model of beam A2, some geometrical changes were incorporated into the cross section of the model with the aim to study the new behavior of beam A2. For this, the thickness of the walls of the hollow rectangular section was changed. Also, lateral flanges with different widths were added. The new results were compared with some related standards/codes rules existents in the literature, were good agreement was found.
Description
Keywords
Abaqus Betão Armado Elementos Finitos Geometria da Secção Torção Viga Em Caixão