多级设防SMA减震装置力学性能试验研究  

EXPERIMENTAL STUDY ON MECHANICAL PERFORMANCE OF MULTI-LEVEL SMA LEAD RUBBER BEARING

作　　者：纪泓言 曹飒飒[1] 邵晨曦 袁万城[2] JI Hong-yan;CAO Sa-sa;SHAO Chen-xi;YUAN Wan-cheng(Department of Civil Engineering,Guangzhou University,Guangzhou 510006,China;Tongji University,State Key Laboratory of Disaster Prevention in Civil Engineering,Shanghai 200092,China)

机构地区：[1]广州大学土木工程学院,广州510006 [2]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《工程力学》2022年第S01期50-57,共8页Engineering Mechanics

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);广东省科技计划项目(2020A1414010271);中国地震局工程力学研究所基本科研业务费专项项目(2019D19)。

摘　　要：地震考验表明,减隔震桥梁具有良好的隔震性能,可大幅减小桥梁下部结构的内力。但是,在速度脉冲型地震动作用下,减隔震支座往往会产生过大变形,造成支座残余变形、梁体碰撞和落梁等震害。为满足桥梁在不同地震水准作用下的不同性能需求,拟提出一种多级设防SMA减隔震装置(Multi-level SMA lead rubber bearing,简称MSLRB)。数值模拟与拟静力试验表明:MSLRB不仅具有变形自恢复,还具有中小震隔震效率高和强震限位能力强等优点。The seismic test shows that the isolation bridge has good isolation performance and can greatly reduce the internal force of the bridge substructure.However,under the action of velocity pulse type ground motion,the isolation bearing will often produce excessive deformation,resulting in the residual deformation of the bearing,the beam collision,the beam falling and other seismic damage.In order to satisfy the different performance requirements of bridges under different seismic levels,a Multi-level SMA lead rubber bearing is proposed and tested.The numerical simulation and quasi-static test show that MSLRB has many advantages such as multi-level performances,self-recovery of deformation and strong limiting capacity.

关 键 词：桥梁抗震 多级设防 拟静力试验 形状记忆合金 OPENSEES 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]