Shaking table tests on eccentric structure with re-centering hybrid friction damper for horizontal-torsional coupled seismic response mitigation
Qian Hui 1Li Hongnan 2,3Gao Xinjun 1
1. Zhengzhou University, Zhengzhou 450001, China
2 Dalian University of Technology, Dalian 116024, China
3. Shenyang Jianzhu University, Shenyang 110168, China
A new Hybrid Shape Memory Alloys Friction Damper (HSMAFD) was developed. The damper consists of pre-tensioned superelastic shape memory alloy wires and friction devices. Cyclic tension-compression test on the damper was carried out to obtain the hysteretic behavior of the damper. With the aim of assessing the effectiveness of HSMAFD in mitigating the horizontal-torsional coupled seismic response of eccentric structures, shaking table tests on a reduced-scale eccentric steel frame model with and without HSMAFD were carried out. The steel frame model, having 3 stories and 2 spans, on a scale of 1:4, was fabricated eccentrically. The effect of the site condition on the seismic response of the structure was considered and the seismic performance of the steel frame model with and without HSMAFD was compared. The experimental results indicate that the HSMAFD can effectively reduce the torsional seismic response as well as translational vibration response of unsymmetrical building| however, the location site type has significant effect on the seismic response of the building.
