Experimental investigation of innovative high-bearing and large-deformation steel plate shear wall utilizing trapezoidal corrugated panel

This paper proposed an innovative high-bearing, energy dissipation, and large ductile deformation corrugated steel plate shear wall (CSPSW) by utilizing a trapezoidal corrugated panel to replace traditional flat steel panel, to avoid steel panel buckling or relieve post-buckling bearing degradation with a certain displacement angle. A total of 8 CSPSW specimens with different aspect ratios (wall panel height to width ratio), panel thicknesses, corrugated sub-panel widths, and corrugation angles, were designed and experimentally investigated by quasi- static tests. The influence of different configuration parameters on the bearing, deformation, energy dissipation, and buckling characteristics, were analyzed. The results indicated that the load-deformation process of CSPSW exhibited 4 stages, including the linear-elastic stage, the yielding stage, the wall panel buckling stage, and the post-buckling fracture stage. With reasonable design of the configuration parameters, the CSPSW could achieve stable bearing capacity, avoiding shear buckling of the corrugated steel panel or exhibiting slight post- buckling bearing capacity degradation, thus achieving an equivalent damping coefficient exceeding 0.4. Additionally, decreasing the width-to-height ratio, width-to-thickness ratio, and sub-panel widths or increasing the corrugation angle of CSPSW's wall panel, was beneficial for achieving a larger buckling displacement angle, improving the post-yielding plastic overstrength, as well as relieving post-buckling bearing degradation and improving energy dissipation. It was suggested the width-to-thickness ratio within 150, the width-to-height ratio within 2.0, the sub-panel width-to-thickness ratio within 20, and the corrugation angle over 45 degrees.