应用SMA控制空间结构地震响应振动台试验研究

Shaking table test on the seismic response of spatial structure based on the control of SMA

形状记忆合金是一种具有多种特性的新兴功能材料,本文针对地震作用下空间结构的主要受力和变形特点,基于形状记忆合金独特的超弹性和形状记忆效应等,研发了形状记忆合金被动控制、主/被动混合控制系统,将其集成于空间结构模型中,并进行了相应的模拟地震振动台试验和分析。研究结果表明,对空间结构模型施加不同幅值的地震波,混合方案的控制效果明显优于优化方案和随机方案,加速度和层间位移明显减小,提高了空间结构的整体抗震性能。

Shape memory alloy is a kind of new functional materials with various properties. In this article, according to the stress and deformation characteristics of spatial structure under the action of the earthquake, based on the unique super-elastic, shape memory effect and other characteristics of shape memory alloy, both shape memory alloy passive and hybrid active-passive control systems were developed. The corresponding shaking table test and analysis were conducted. The results show that by imposing different amplitude of seismic wave on the spatial structure model, hybrid control effect is superior to optimize plan and random plan, acceleration and displacement between layers decrease obviously. It also improves the overall seismic performance of spatial structure.