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Anisotropic Damage Model for Concrete

2011; American Society of Civil Engineers; Volume: 137; Issue: 9 Linguagem: Inglês

10.1061/(asce)em.1943-7889.0000260

1943-7889

José Júlio de Cerqueira Pituba, Gabriela Rezende Fernandes,

Numerical methods in engineering

In this paper, a damage constitutive model accounting for induced anisotropy and bimodular elastic response is applied to two-dimensional analysis of reinforced concrete structures. Initially, a constitutive model for the concrete is presented, where the material is assumed as an initial elastic isotropic medium presenting anisotropy and bimodular response (distinct elastic responses, whether tension or compression stress states, prevail) induced by damage. Two damage tensors govern the stiffness under prevailing tension or compression stress states. Criteria are then proposed to characterize the dominant states. Finally, the proposed model is used in plane analysis of reinforced concrete beams to show its potential for use and to discuss its limitations.