SEISMIC RESPONSE CONTROL OF STRUCTURES USING SHAPE MEMORY ALLOY DAMPER
Shape memory alloys (SMAs) are a relatively new class of functional material, exhibiting peculiar thermo- mechanical behaviours such as shape memory effect and superelasticity, to be considered for application in seismic engineering. SMAs have the capability to dissipate energy through repeated cyclic loading at large strain without significant permanent deformations. By utilizing the hysteretic damping characteristic and recentring capability of superelastic SMAs, innovative SMA-based devices for passive seismic control can be developed. In this paper, firstly, an improved Graesser and Cozzarelli constitutive model based on plastic theory for superelastic SMAs was introduced. Then an innovative SMA-based damper was proposed and tested. Lastly, nonlinear time history analysis on the multi-story frame structure involving SMA-based dampers subjected to earthquake ground motions was performed. Experimental results show that the proposed passive damper based on superelastic SMA wires has satisfying hysteresis proerties, including both recentring and energy dissipating features. Moreover, numerical analysis results indicate the above-mentioned damper is capable of significantly reducing seismic response of structures, which verifies its effectiveness as energy dissipated device for structures.
H.N. Li H. Qian G. Song
School of Civil and Hydraulic Engineering, Dalian University of Technology, Dalian 116024, P.R. Chin Department of Mechanical Engineering, University of Houston, Houston, TX 77204, USA
国际会议
长沙
英文
1010-1018
2007-11-19（万方平台首次上网日期，不代表论文的发表时间）