Parametric analysis and failure mode of steel plate shear wall with self-centering braces

Abstract

A steel plate shear wall with self-centering energy dissipation braces (SPSW-SCEDB) is developed and tested. The SPSW-SCEDB is prefabricated and replaceable. The effects of various design parameters on the hysteretic behavior of the SPSW-SCEDB without the effects of the frame are investigated. The experimental results show that the residual deformations of the wall plate are eliminated by the restoring force of braces, and the SPSW-SCEDB exhibits high initial stiffness, stable post-yield stiffness, and good energy dissipation capability. The SPSW-SCEDB with a thicker and wider wall plate has better energy dissipation capacity and higher post-yield stiffness. The wider wall plate reduces the lateral force contribution of the braces to the SPSW-SCEDB, resulting in the weakening of the overall strength of the SPSW-SCEDB. The SPSW-SCEDB has a good self-centering capability when the ratio of the horizontal restoring force of the braces to the compressive force of the wall plate is larger than 1.3. Compared with the size of the wall plate, the effect of the friction force on the SPSW-SCEDB is relatively small. The destructive test results demonstrate that the SPSW-SCEDB maintains stable lateral force resistance, energy dissipation and self-centering capabilities, even though the lateral drift is 4% and many wrinkles that cannot be smoothed out occur on the wall plate. In addition, the test results highlight the assembly capability and the replaceability of the components of the SPSW-SCEDB.