Lateral behavior of trapezoidally corrugated wall plates in steel plate shear walls, Part 2: Shear strength and post-peak behavior

摘要

This research focuses on the shear strength and post-peak behavior of trapezoidally corrugated wall plates in vertically or horizontally Corrugated Steel Plate Shear Walls (CoSPSWs) through nonlinear pushover analyses. Results showed that different from flat wall plates, corrugated wall plates could develop a shear strength close to the shear yield strength at relatively low lateral drifts, and the lateral load-drift curves usually experienced a descending stage, which was closely related to the elastic shear buckling stress, the dominant shear buckling mode, and the shear yield strength. Corrugated wall plates with higher elastic shear buckling stress, dominant global shear bucking mode, or lower shear yield strength would generally have slightly higher peak nominal shear stress ratio and much higher ductility than wall plates with lower elastic shear buckling stress, dominant interactive or local shear bucking mode, or higher shear yield strength. A shear slenderness ratio lambda(s) was then introduced as the square root of the ratio between the shear yield strength and the elastic shear buckling stress, and simplified lateral load-drift curves were proposed for corrugated wall plates with different dominant shear buckling modes and range of lambda(s) values. The proposed curves could accurately predict the initial lateral stiffness, the shear strength as well as the post-peak descending behavior of corrugated wall plates.