LAUSR

The shear steel panel damper (SPD) is gradually used in the seismic design owing to the stable energy dissipation capacity. To date, most shear panels in the conventional SPD are welded with stiffeners against excessive local buckling. In this study, a duplex assembled I-shaped steel panel damper strengthened by CFRP sheets (C-DAISPD) is proposed to avoid the failure owing to undesired cracks in the web plate. A hot-rolled H-beam is processed to an energy dissipation unit with the web strengthened by the carbon fiber reinforced polymer (CFRP) sheets and stiffeners welded to the flanges. Then, two units are assembled back-to-back to form a damper. The C-DAISPD is developed to enhance the effect of buckling restraint, the ductility, and the sustainable stable energy absorption. Quasi-static tests of three specimens and numerical models were conducted to investigate the strengthening effect on the damper. The results indicated that the CFRP sheets benefited the hysteretic performance and the ductility of the C-DAISPD. The bearing capacity and the energy dissipation capacity could be significantly improved with the four-edge weld connection and the increase in the width of the web.