Experimental study on seismic behavior of concrete-filled square steel tubular frame-thin steel plate shear walls with cross stiffeners
Wang Xiantie1, Zhou Qinghan2, Ma Yousufu1, Gao Yajing1, Jia Guiqiang1
1. Xi′an University of Architecture & Technology, Xi′an 710055, China; 2.China Machinery International Engineering Design & Research Institute Co., Ltd., Changsha 410021, China
Abstract：In this study, low cyclic loading tests were conducted on three 1/3-scale single-span two-floors test models designed with thin steel plate shear walls (SPSWs) and concrete-filled square steel tubular frames. The seismic behavior of SPSWs with cross stiffeners was studied and compared with that of unstiffened SPSWs. A comparison between inner diaphragm connection and core-through high-strength bolts-endplate connection was conducted for their influences on the structural performance. The failure pattern, load-displacement hysteretic curves, skeleton curves, characteristic load, characteristic displacement, and seismic performance indexes were obtained. Furthermore, the failure characteristics, ductility, energy dissipation capacity, load carrying capacity and stiffness degeneration were studied. Experimental results show that the concrete-filled square steel tubular frame-thin steel plate shear walls possess favorable seismic performance. The cross stiffeners can restrict the out-of-plane deflection of SPSWs and improve their bearing capacity and energy dissipation capacity, but have little effect on the overall stiffness. The core-through high-strength bolts-endplate connection can enhance the load carrying capacity and stiffness of structures.
