Effect of Tensile Damage Parameter Reducing in Non-linear Analysis of Reinforced Concrete Structures using Concrete Damage Plasticity Method

Introducing the behavior of reinforced concrete materials is generally considered as one of the complex parts of modeling in finite element software. On the other hand, entering accurate material information has an effective role in software output results. There are several methods in ABAQUS software for nonlinear analysis of reinforced concrete, one of which is the use of a damaged plastic model of concrete.In this method, entering the mechanical properties of concrete is of special importance, so that in case of insufficient data entry, many errors are created in the results and sometimes cause no convergence despite spending a lot of time analyzing in the software. In most numerical modeling in ABAQUS, it is noted that by eliminating the number of points in the inelastic stress-strain curves and in the tensile damage parameter, despite the reduction in analysis time, what errors occur for software outputs.In this study, according to the conditions of ABAQUS software in entering numerical values that should be positive for plastic strains and with increasing strain, the amount of plastic strain should also be ascending. It becomes plastic. Therefore, first, structural analysis is performed by entering the stress and compressive strain points of concrete, compressive damage parameter (dc) and tensile damage parameter (dt) completely, and then by changing the number of stress points and tensile strain and tensile damage parameter (dt), this analysis is repeated. Finally, the results of the displacement load curves at the output are examined and compared.