Evaluation of capacity and performance of composite shear walls with T-shaped stiffeners

Composite steel sheet shear wall (CSPSW) is a relatively new structural system that has been proposed to improve the performance of steel sheet shear walls by adding one or two layers of concrete wall to the filler plate. In addition, the buckling of the filler steel sheet has a significant negative effect on the shear strength and energy dissipation capacity of general systems. Accordingly, in this study, using the finite element method (FE), the performance and behavior of composite steel shear walls using T-shaped hardeners to prevent buckling of the filler steel sheet and increase the capacity of the CSPSW system have been investigated. In this paper, after modeling the shear walls of composite steel sheets with finite element methods and calibrating the models with experimental results, the effect of parameters such as the type of hardener including vertical, horizontal, diagonal and a combination of T-shaped stiffeners and its effect On the final capacity, the buckling of the sheet plates, the von Mises stress and the failure states have been investigated. The results show that the arrangement of vertical and horizontal stiffeners does not have a significant effect on the capacity and performance of CSPSW. Also, the use of vertical or horizontal stiffeners does not significantly affect the capacity and performance of CSPSW. On the other hand, the use of diagonal hardeners potentially affects the performance of CSPSW and increases the capacity of steel shear walls by up to 25%.