Seismic Performance and Optimal Layout of a Grid-Shaped Steel Plate Shear Wall

This paper proposed a grid-shaped steel plate shear wall(GSPSW) composed of strip steel members, boundary beams, and columns. Two 1: 2 scale T-shaped steel and channel steel specimens were tested under lateral cyclic loading, and the mechanical properties of GSPSW were initially investigated. The finite element analysis (FEA) model of GSPSW was established, and the accuracy of the model was verified by test data. Results show that GSPSW possesses favorable rigidity, ductility, and bearing capacity. T-steel GSPSW exhibits a superior performance compared to that of the U-steel GSPSW. Under a lateral force, the middle shape steel will yield first and then extend to both sides. Moreover, the failure mode of the test piece is the crack at the joint of the single-shaped steel member and the fishplate, while the rest of the shape steel can still bear the load. The interlayer displacement angle of the damaged test piece is higher than 1/50, and the strength degradation coefficients of the test piece after each load cycle are all above 0.92, demonstrating a stable structure mechanical performance. In addition, the performance of GSPSW is favorably simulated by the finite element model. The maximum error of the peak load of the finite element simulation of the test piece is 13%. Meanwhile, proportions of the embedded steel grid resisting the lateral force and energy consumption are higher than 48%, which can well coordinate the resisting lateral force and energy consumption with the steel frame and protect the main structure body under the lateral force. Energy consumption in the early stage mainly resulted from the embedded steel grid, which is gradually decreased with the residual deformation of the shape steel and compression. Hence, the principle of non-interference at the joints of the two side shape steel fishplates, the concepts of minimum horizontal angular distance and minimum vertical angular distance, and uniform distribution constraint criterion are proposed to implement the optimal GSPSW layout through adjusting the minimum horizontal angular distance. © 2021, Editorial Board of Journal of Tianjin University(Science and Technology). All right reserved.