SMA-负刚度摩擦摆支座力学性能  

Study on Mechanical Properties of SMA-Negative Stiffness Friction Pendulum Bearing

作　　者：桂石海 龙晓鸿[1,2] 范剑锋[3] 刘雅琴[1] 周群林 卢春德 GUI Shihai;LONG Xiaohong;FAN Jianfeng;LIU Yaqin;ZHOU Qunlin;LU Chunde(School of Civil and Hydraulic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Hubei Key Laboratory of Control Structure,Huazhong University of Science and Technology,Wuhan 430074,China;School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]华中科技大学土木与水利工程学院,湖北武汉430074 [2]华中科技大学湖北省控制结构重点实验室,湖北武汉430074 [3]武汉理工大学土木工程与建筑学院,湖北武汉430070

出　　处：《土木工程与管理学报》2023年第4期126-132,共7页Journal of Civil Engineering and Management

基　　金：国家自然科学基金(51978306)。

摘　　要：SMA-负刚度摩擦摆支座是在负刚度摩擦摆支座上布置SMA丝或索的一种新型隔震装置。首先介绍了该新型隔震装置的构造特点和工作原理,随后对负刚度摩擦摆支座和布置SMA丝或索的SMA-负刚度摩擦摆支座进行了试验研究,并建立了其恢复力模型,最后通过有限元模拟探讨了位移幅值、摩擦系数、竖向荷载和SMA丝的数量对SMA-负刚度摩擦摆支座力学性能的影响。结果表明:相较于SMA丝,选用的SMA索耗能更大,但残余应变也更大;负刚度摩擦摆支座需搭配SMA等材料形成复合型支座使用,且SMA丝一定要绷直布置在支座两侧;SMA-负刚度摩擦摆支座的力学性能良好,竖向荷载、摩擦系数在增加耗能方面,比提高恢复力更突出,而位移幅值、SMA丝提高恢复力的效果比增加耗能更加显著。SMA-negative stiffness friction pendulum bearing is a new type of isolation device with SMA wires or cables arranged on the negative stiffness friction pendulum bearing.In this paper,firstly,the structural characteristics and working principle of the new isolation device were introduced.Then,experimental studies were carried out on the negative stiffness friction pendulum bearings and SMA-negative stiffness friction pendulum bearings with SMA wires or cables,and their restoring force models were established.Finally,the effects of displacement amplitude,friction coefficient,vertical load and number of SMA wires on the mechanical properties of SMA-negative stiffness friction pendulum bearings were discussed by finite element simulation.The results show that compared with SMA wire,the SMA cable selected has higher energy consumption and larger residual strain;The negative stiffness friction pendulum bearing should be used with SMA and other materials to form a composite bearing,and the SMA wire must be stretched on both sides of bearing;The SMA-negative stiffness friction pendulum bearing has good mechanical performance.The vertical load and friction coefficient are more prominent in increasing the energy consumption than in improving the resilience,while the displacement amplitude and SMA wire are more effective in improving the resilience than in increasing the energy consumption.

关 键 词：形状记忆合金 SMA-负刚度摩擦摆支座 力学性能试验 有限元分析 

分 类 号：TU352.1[建筑科学—结构工程]