AN INNOVATIVE SHAPE MEMORY ALLOY DAMPER FOR PASSIVE CONTROL OF STRUCTURES SUBJECTED TO SEISMIC EXCITATIONS
An innovative re-centering damping device is presented. Being configurated simply, the device comprises two functional groups of superelastic SMA strands, i.e. the un-pre-tensioned strands and the pre-tensioned strands, resulting in a perfect energy dissipation compatible with a negligible residual displacement. Extensive experiments are carried out to investigate the influence of displacement amplitude and loading frequency on the mechanical behaviors of the device. While increasing the displacement amplitude, the secant stiffness reduces considerably, the energy loss increases, and the equivalent damping exhibits the maximum value at moderate displacement amplitude. The energy dissipation and the equivalent damping decrease with the increasing frequency, but the secant stiffness seems not much sensitive to frequency. Shaking table tests of a two-story steel frame demonstrate that the device not only can reduce the inter-story displacement of the structure subjected to earthquakes, but also can eliminate the residual displacement after excitations.
shape memory alloy superelasticity re-centering damping device mechanical tests shaking table tests
Wenjen Ren Hongnan Li Gangbing Song
Associate Professor, School of Civil Engineering , Hebei University of Technology, Tianjin. China Professor, State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology Professor, Department of Mechanical Engineering, University of Houston, Houston, USA
国际会议
14th World Conference on Earthquake Engineering(第十四届国际地震工程会议)
北京
英文
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）