Finite Element Modeling of Punching Shear in Two-Way Slabs Reinforced with High-Strength Steel

摘要

This paper presents the development of a 3D nonlinear finite element (FE) model to predict the punching shear of two-way reinforced concrete (RC) slabs. Six slabs casted with regular and steel fiber reinforced concrete (SFRC) and reinforced with normal and high strength steel reinforcement were modeled using ANSYS. The results were validated with published experimental data. The computational model accounts for the different nonlinear constitutive material laws by utilizing state-of-the art modeling methodologies. Concrete cracking and softening, effects of the embedded steel fibers, steel yielding, and the bond-slip mechanism of the embedded steel reinforcement were all taken into account. A good correlation was obtained between the predicted and measured results at all stages of loading including failure of the specimens. It is concluded that correlating models could be used as a reliable tool to conduct parametric studies to evaluate the punching shear behavior of two-way slabs cast with normal and SFRC concrete, reinforced with ordinary and high-strength steel reinforcement.