Modelos de armadura e aderência para análise não-linear de estruturas de concreto armado

Detalhes bibliográficos
Ano de defesa: 2003
Autor(a) principal: Wolnei Iris de Souza Simao
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de Minas Gerais
UFMG
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://hdl.handle.net/1843/GORO-5SJR3B
Resumo: This work discusses the nonlinear finite element analysis of reinforced concrete structures, using several reinforcement and bond-slip models.Plane and axis-symmetric finite elements are used to represent the concrete. To the reinforcement bars, the discrete, embedded and axis-symmetric point reinforcement elements are adopted. To treatment of the bond between materials, the bond-link and contact models canbe used or it can be incorporated into the embedded reinforcement element. The constitutive behavior of the concrete, reinforcement bar and concrete-steel interface region, is described by appropriate nonlinear models: the damage and microplane models to concrete, elastoplastic to steel and different stress-slip laws to bond. The incremental-iterative methods used to perform the equilibrium paths and some materialsconstitutive models, are briefly discussed. A detailed study about the main models to include the reinforcement and to treatment of the bond lost is presented. The models implementation, as expansion of an object oriented computational program, is also discussed. Some numerical simulations of reinforced concrete members, subjected to different strainstates, are presented. These simulations are compared with experimental results in order to validate the implemented models.The discussion of the results shows that the modeling tools utilized permit better comprehenssion of the deterioration and collapse of the reinforced concrete structures.