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Indexed by:会议论文

Date of Publication:2009-07-08

Included Journals:EI、CPCI-S、Scopus

Volume:7493

Key Words:shape memory alloy; superelasticity; damper; shaking table test; passive seismic control

Abstract:Superelastic shape memory alloys (SMAs) are a class of materials that have the ability to undergo large deformations while reverting back to their original shape through removal of stress. The unique material can be utilized as key components for seismic energy dissipation in earthquake engineering. In this paper, an innovative recentering SMAs-based damper (RSMAD) is introduced. Cyclic tensile-compressive tests on the damper with various pre-strain under different loading frequency and displacement amplitude are conducted. To assess the effectiveness of the damper in reducing dynamic response of structures subjected to strong seismic excitations, an extensive experimental program and main results of shaking table tests performed on reduced-scale steel frame model with and without RSMAD are presented. In the shaking table tests, several representative seismic signals as well as white noise motion are utilized as input energy. The comparisons of dynamic behaviors, i.e. storey displacements, interstorey drifts and storey accelerations, of structural model with and without RSMAD under seismic loading are conducted. The results show that RSMAD is effective in suppressing the dynamic response of building structures subjected to strong earthquakes by dissipating a large portion of energy through their hysteretic loops.