Parametric study of nonlinear finite element punching behavior of fiber-reinforced concrete slab

This paper investigates the effect of fiber on the behavior of punching shear slabs; a finite element modeling approach is used to simulate the case study. The proportion mix of hybrid fiber-reinforced concrete, which contains 0.2 percent macro synthetic fibers and 0.68, 0.8, and 0.96 percent steel fibers, compressive strengths of 50 MPa, different longitudinal reinforcement used, and slab thicknesses of 150, 200, and 250 mm are all joined and investigated in this study. The ATENA software is used to perform nonlinear finite element analysis. The slab results validation was done similarly to previous experimental work, and the acquired results indicated a significant agreement. Thirty-six two-way specimen slabs with dimensions of 1900 × 1900mm were modeled in this investigation. All four sides of the slabs are supported. The results showed that the slabs\' ultimate shear capacity increases with increasing the hybrid steel fiber. Nevertheless, the ultimate capacity of the slabs has decreased due to an increase in the reinforcement ratio and slab thickness.