Axial compression behavior of corrugated plate stiffened double-layer steel plate shear walls

Abstract

In order to improve the buckling and axial compression performance of steel plate shear wall (SPSW), this paper proposes a novel corrugated plate stiffened double-layer steel plate shear wall (CPS-DSPSW), which is formed by welding boundary columns with I-shaped wall units composed of outer steel plates and corrugated plates. To investigate axial load-bearing capacity, nine specimens were designed for axial compression tests by adjusting parameters such as wall height, outer plate thickness, corrugated plate number and layout, and concrete infill. The axial performance of different specimens was measured based on the load-equivalent vertical strain curve. The test results show that CPS-DSPSW has good axial compression bearing capacity, with failure combining global instability and local buckling. Increasing the aspect ratio of the shear wall makes it more likely to cause global instability, otherwise strength failure will occur. As the thickness of the outer steel plate increases, the effective bearing cross-sectional area increases, which improves the ultimate bearing capacity of the specimen. Corrugated plate layout has little effect on the performance, as it cannot directly resist axial compressive load. By contrast, increasing wall thickness and adding concrete significantly improve axial compression performance; concrete restrains the outer plate, limits large-area local buckling, and enhances global stability. Finally, the results of the tests in this paper are compared with the compressive stability bearing design theory of the internally stiffened double-layer steel plate shear walls with flat plate, which shows that the theory can provide a reliable basis for safe design of CPS-DSPSW.