Numerical simulation of fracture processes in concrete beams with conventional and steel fiber reinforcements, using the stress-crack opening relationship / Simulação numerica de processos de fratura em vigas de concreto armado e reforçado com fibras de aço, utilizando a curva tensão-abertura de fissura

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

This work addresses the study of fracture processes in concrete beams with conventional and steel fiber reinforcements, through numerical simulation with DIANA Finite Element Analysis code. The study include the research area of cementitious material composites, obtained from the addition of discrete and randomly oriented steel fibers to the concrete, and the area of numerical analysis of solids containing cracks. Numerical simulations of fracture processes in beams, subject to flexure and shear under monotonic load, were performed according to the smeared crack model and to the discrete crack model. The stress-crack opening curves (? ? ?w), used to characterize the material constitutive behavior of the concrete after tensile stress is reached, were obtained by inverse analysis of notched prismatic specimens subject to three-point-bending tests. The simulations were performed to compare numerical and experimental results from notched three-point-bending specimens and from reinforced beams designed for diagonal shear or flexural failure. Specimens with and without steel fibers were analyzed in all the cases

ASSUNTO(S)

fracture process numerical simulation reinforced concrete (sfrc) concreto armado mecanica da fratura fibras simulação (computadores digitais) metodo de elementos finitos nonlinear analysis steel fiber materiais compostos finite element methods

ACESSO AO ARTIGO

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