Influência do modelo de fissuração na modelagem em elementos finitos de vigas de concreto armado

• Ano de defesa: 2014
• Autor(a) principal: Pacheco, Thiago Mendonça
• Orientador(a): Lima, José Mário Feitosa
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual de Feira de Santana
• Programa de Pós-Graduação: Mestrado em Engenharia Civil e Ambiental
• Departamento: DEPARTAMENTO DE CIÊNCIAS EXATAS
• País: Brasil
• Palavras-chave em Português: Concreto; Elementos finitos; Modelo de fissuração
• Palavras-chave em Inglês: Concrete; Finite element; Crack model
• Área do conhecimento CNPq: ENGENHARIAS::ENGENHARIA CIVIL
• Link de acesso: http://localhost:8080/tede/handle/tede/131

Concrete is a very versatile material widely used by the construction industry. However, the adequate application of your nonlinear behavior, by numerical methods is still a major challenge in structural engineering. In this workwas evaluated three methods of distributed crackingbased Fracture Mechanics: fixed rotational and multidirectional. , To this the flexural behavior of beam was simulated numerically by the commercial software DIANA ®, and compared with experimental results reported in the literature. For the beams that failed by bending, the numerical simulation for all three models shown agreement with experimental results with ability to predict the equilibrium path, the maximum load and deformation failure. However, to analysis of beams that failed by shear, the fixed crack model did not capture properly the rupture load and the rotational model presented numerical instability after the start of diagonal cracking. Moreover, the multidirectional model describes the complete load-displacement behavior and adequately predicts the appearance of diagonal cracks as well as the latest load and deformation.