Structural performance of H-type shear panel damper made of hot-rolled mild steel

Abstract

In this study, cyclic loading experiments were performed to understand the mechanical characteristics of SPHC (hot-rolled mild steel) H-type shear panel dampers in a stud support-type installation. The specimens evaluated had panel width-to-thickness ratios of 48.9 and 52.5. Constant amplitude deformation loading was performed using shear deformation as a variable. A stable spindle-shaped hysteresis curve was exhibited with strength reduction caused by out-of-plane deformation. Maximum strength was achieved near the second cycle for all specimens and the specimens with the lower width-to-thickness ratio exhibited slightly higher strength increase ratios. Similarly, energy absorption capacity depended on load amplitude and width-to-thickness ratio of the panel part and specimens with a smaller width-to-thickness ratios corresponding to larger accumulative energy dissipation. Based on the Manson–Coffin law, the deformation capacity of the tested specimens was found to be lower throughout the fatigue curve when compared with the relative architectural guidelines.