格构式大行程形状记忆合金限位装置研究  

Research on latticed long-stroke shape memory alloy restrainer

作　　者：李永河[1] 王国炎 党新志 曹飒飒 LI Yonghe;WANG Guoyan;DANG Xinzhi;CAO Sasa(College of Civil and Transportation Engineering,Guangzhou University,Guangzhou 510006,China;Department of Bridge Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]广州大学土木与交通工程学院,广东广州510006 [2]同济大学桥梁工程系,上海200092

出　　处：《地震工程与工程振动》2025年第1期61-73,共13页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(52178124,51608136,51278134);广东省自然科学基金项目(2020A1515010231)。

摘　　要：为限制墩梁间过大的相对位移,在单根大行程形状记忆合金限位装置(long-stroke shape memory alloy restrainer,LSR)的基础上,拟提出一种基于形状记忆合金棒的格构式大行程限位装置(latticed long-stroke restrainer,LLSR)。该装置由具有良好超弹性能和自复位性能的形状记忆合金(shape memory alloy,SMA)棒、MC尼龙、钢管和缀条或者缀板组成。SMA棒可消耗地震动能量并提供自复位能力;MC尼龙和钢管构成防屈曲体系,可防止SMA棒在受压时发生屈曲。首先,阐明单根大行程形状记忆合金阻尼器和格构式大行程形状记忆合金阻尼器的构造和工作机理;其次,对不同热处理温度下的SMA棒进行拉伸试验,确定超弹性能最好的SMA棒,以超弹性能最好的SMA棒作为LSR的内芯,接着开展单根LSR的轴向拉压试验,进一步研究其力学性能;最后,以LSR试验数据为基础,并且基于ABAQUS有限元软件,对LLSR进行数值分析和参数分析,以数值分析和参数分析的结果为依据提出相应的设计方法。研究表明,LLSR不仅具有稳定的耗能能力,还有良好的自复位能力。In order to limit the excessive relative displacement between pier and beam,a latticed long-stroke restrainer(LLSR)based on shape memory alloy(SMA)bar is proposed on the basis of single long-stroke shape memory alloy restrainer(LSR).The device consists of SMA alloy bar with excellent superelasticity and re-centering performance,MC nylon,steel pipes and strips or plates.SMA bars can consume ground motion energy and provide re-centering capability.The MC nylon and steel pipe form an anti-buckling system to prevent the SMA bar from buckling under pressure.Firstly,the structure and working mechanism of single long-stroke shape memory alloy damper and lattice long-stroke shape memory alloy damper are described.Secondly,the tensile test of SMA bars under different heat treatment temperature was carried out to determine the SMA bar with the best superelasticity,which was then used as the inner core of the LSR.Then,the axial tension and compression experiment of a single LSR was conducted to further study its mechanical properties.Finally,based on the experimental data of the LSR and the finite element software of ABAQUS,the numerical analysis and parameter analysis of the LLSR were carried out,and the corresponding design method was proposed according to the results of numerical analysis and parameter analysis.The research shows that LLSR not only has stable energy dissipation capacity but also has good re-centering ability.

关 键 词：格构式 阻尼器 形状记忆合金 MC尼龙 试验 自复位 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]