Hysteretic Behavior of a Grid-Reinforced Corrugated Steel Plate Shear Wall

To further improve the lateral performance and seismic capacity of steel plate shear walls(SPSWs), a new type of grid-reinforced corrugated steel plate shear walls(CSPSWs) is proposed in this paper. The entire corrugated wall panel is divided into several small wall panels embedded within the subframe, while subframes work together with the embedded wall panel, forming an overall lateral resistance system with the boundary frame. Based on the finite element numerical analysis, four shear wall models, namely, conventional flat SPSW, conventional CSPSW, grid-reinforced flat SPSW, and grid-reinforced CSPSW, are established to analyze the hysteretic performance under cyclic loading. Then, their stress development, out-of-plane deformation, hysteretic curves, and equivalent damping ratios are compared. Meanwhile, the internal forces of the boundary frame columns, namely, axial force, shear force, and bending moment, of the four models are compared. Lastly, the effects of key parameters, such as the number of embedded wall panels and grids and the material strength of different parts and rib stiffness ratio, on the hysteretic performance, stress development, and bearing capacity of the structure are discussed. The results show that the subframe improves the hysteretic performance, including the lateral strength, ductility, and energy dissipation of SPSWs, by reducing the pinch of the hysteretic curve of the conventional flat SPSW and the degradation of the lateral resistance of the conventional CSPSW. In addition, under the maximum story drift ratio, an insignificant out-of-plane deformation occurs in the grid-reinforced CSPSW, which improves the comfortability for common use. Moreover, due to the action of subframes and embedded wall panels, the shear distribution of the boundary frame columns of grid-reinforced SPSWs and CSPSWs is uniform, and the additional bending moment caused by the “tension field” is also significantly reduced. Decreasing the number of embedded wall panels and increasing the number of subframe grids can reduce the degradation of the lateral resistant capacity of the CSPSW. When high-strength steel is used in the boundary frame and subframe, the bearing capacity and seismic performance of the system can be significantly improved. With the increase in the rib stiffness ratio, the bearing capacity of the wall plate is effectively enhanced, and the threshold rib stiffness ratio should be satisfied in the design. Overall, grid-reinforced CSPSWs can yield a reasonable yield order from the embedded steel plate to the subframe and then to the boundary frame and effectively reduce the area of the yield zone of the boundary frame, leading to a good lateral resistance and energy dissipation ability. © 2022 Tianjin University. All rights reserved.