離散ひび割れを考慮したRC版の押し抜きせん断破壊性状に関する数値解析

抄録

This paper aims to establish a nonlinear numerical analysis method based on three-dimensional elasto-plastic FEM for simulating punching shear failure behavior of two-way RC slabs. In this method, rebars were modeled as a piece of plate to enhance the applicability in case of complicated arrangement of rebar. Geometrical discontinuity of punching shear failure surface, bond slipping of main rebar and splitting of concrete cover were considered applying with discrete crack approach. Two slabs that tested using a circular loading-plate were analyzed, in which, diameter of loading-plate is different with each other. The validity of the proposed method was inspected by comparing the analytical load-displacement curves and distribution of cracks with those of the experimental ones. As a result, load-carrying capacity and punching shear failure behavior of two way RC slabs can be simulated with a good agreement of the proposed method.