Análise tridimensional de elementos estruturais de concreto armado via elementos finitos com descontinuidades incorporadas

Abstract

This paper presents a methodology to model three-dimensional reinforced concrete members by means of embedded discontinuityelements based on the Continuous Strong Discontinuous Approach (CSDA). Mixture theory concepts are used to model reinforced concreteas a 3D composite material constituted of concrete with long fiber bundles (rebars) oriented in different directions embedded in it.The effects of the rebars are provided by phenomenological constitutive models designed to reproduce the axial non-linear behavior, aswell as bond-slip and dowel action. This paper is focused on the constitutive models assumed for the components and the compatibilityconditions chosen to constitute the composite. Numerical analyses of existing experimental reinforced concrete members are presented,illustrating the applicability of the methodology.