Estimativa da rigidez à flexão em vigas de concreto simples por meio da teoria do dano concentrado

• Ano de defesa: 2017
• Autor(a) principal: Uchoa, Bruna Camerino Lira
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Alagoas; Brasil; Programa de Pós-Graduação em Engenharia Civil; UFAL
• Palavras-chave em Português: Teoria do dano concentrado; Mecânica da fratura do concreto; Mecânica do dano contínuo – Concreto; Concreto – Rigidez à flexão; Concreto simples; Lumped Damage Mechanics; Fracture Mechanics; Damage Mechanics; Flexural stiffness; Unreinforced concrete; CNPQ::ENGENHARIAS::ENGENHARIA CIVIL
• Link de acesso: http://www.repositorio.ufal.br/handle/riufal/2518

This work addresses the application of Lumped Damage Mechanics (LDM) to the estimation of the flexural stiffness in concrete beams subject to the bending test, according to length a pre-existing crack that is related to the variable called damage. The estimative is carried out using abaci that relate flexural stiffness, displacements and damage to different levels of force. The formulation used to create the abacuses was developed using concepts of lumped damage mechanics. LDM was formulated by applying fundamentals concepts of fracture and damage mechanics applied on plastic hinges, now called inelastic hinges, in order to evaluate the effects of cracks in the material, considering non-linear behavior in a simple approach. The results obtained by the estimation of the flexural stiffness through LDM using experimental data are satisfactory.