Analytical Study of Punching Shear Capacity in Reinforced Concrete Flat Slabs with Opening Strengthened with Steel Plates and Shear Stud

Reinforced concrete flat slabs are widely employed in structural systems. The location of the slab-column connection is the most sensitive part of the flat slab due to the existence of a high flexural anchor and shear force. On the other hand, the utilization of flat slabs directly resting on columns, in the case of punching shear failure, reveals their vulnerability that the presence of openings will increase the probability of punching shear failure. This study is the numerical study of the effect of strengthening the reinforced concrete flat slabs with opening and external steel plates on the punching shear capacity. Initially, verification of the numerical model by the experimental sample conducted. Then some reinforced concrete flat slabs with reinforced opening and external steel plates with various dimensions and thickness as well as diameter, length, number and order of the different shear studs under the load, by using the finite element method analysis and the results of the various samples were compared with each other. The strengthening of the reviewing slabs improved the condition of stiffness and increased the punching shear capacity. The reviews also indicated that this situation improve dependent on the dimensions and the thickness of the plate and the diameter, length, number, and order of the shear studs. The results of this research suggested that if you use the right behavioral model in the simulation process, the finite element method can be a useful tool for analysis and secure and optimum design of reinforced concrete slab.