SMA-橡胶支座恢复力的实用模拟

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (8) : 204-212.

论文

SMA-橡胶支座恢复力的实用模拟

庄鹏1, 2，薛素铎3

作者信息 +

Practical Simulation of Restoring Force of SMA-Rubber Bearing

Zhuang Peng1, 2, Xue Suduo3

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文章历史 +

摘要

SMA-橡胶支座是一种可利用记忆合金超弹性滞回进行耗能的隔震装置。在概念设计的基础上，进行了SMA-橡胶支座的拟静力试验，证实了这一支座具有良好的隔震耗能特性。为了使SMA-橡胶支座的性能特点便于结构工程师所掌握，将线性最小二乘数据拟合技术和结构分析软件中常见的微分型恢复力模型用于模拟其水平力，数值计算所得到的恢复力-位移滞回曲线及支座性能参数值与试验结果吻合良好。可见，引入上述实用模拟方法有助于利用现有结构分析软件建立SMA-橡胶支座隔震单元，从而促进了这种隔震支座在实际工程中的应用。

Abstract

SMA-rubber bearing is a type of seismic isolation device which can dissipate energy by using hysteretic effect from the superelasticity of shape memory alloy (SMA) material. Based on the isolator’s concept design, a series of pseudo-static test of the SMA-rubber bearing are carried out and the excellent seismic isolation and energy dissipation performances are verified by the experimental results. To promote the structural engineers’ mastery of the seismic isolation characteristics of the SMA-rubber bearing, least square fitting and differential restoring model commonly used in structural software are considered to simulate the horizontal force of the isolator. After that, the restoring force-displacement hysteresis loops and the values of performance parameters from the differential restoring model are compared with those from the experimental data. It can be found that experimental results match closely with those obtained from the above-mentioned model. Thererfore, introduction of such a practical method contributes to establishment of the SMA-rubber isolator element with the existing structural analysis software and application of the SMA-based isolation bearings in engineering structures.