形状记忆合金-铅芯橡胶支座对简支梁桥抗震韧性的影响  

Seismic reduction capability and toughness improvement of shape memory alloy lead rubber bearings for simply supported girder bridges

作　　者：林燕枝 陈宗燕 邹赐 付青 许莉[5] LIN Yanzhi;CHEN Zongyan;ZOU Ci;FU Qing;XU Li(Fuzhou Zuohai Holding Group Co.,Ltd.,Fuzhou,Fujian 350007,China;Fuzhou Zuohai Construction Investment Co.,Ltd.,Fuzhou,Fujian 350003,China;College of Civil Engineering,Chongqing Jiaotong University,Chongqing,400074,China;College of Civil Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China;College of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China)

机构地区：[1]福州左海控股集团有限公司,福建福州350007 [2]福州左海建设投资有限责任公司,福建福州350003 [3]重庆交通大学土木工程学院,重庆400074 [4]西南交通大学土木工程学院,四川成都610031 [5]福州大学土木工程学院,福建福州350108

出　　处：《福州大学学报(自然科学版)》2025年第2期201-209,共9页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省科技厅引导性基金资助项目(2024H0007)。

摘　　要：为研究形状记忆合金-铅芯橡胶支座(SMA-LRB)的减震与韧性效果,建立安装SMA-LRB和铅芯橡胶支座(LRB)的五跨桥梁三维有限元模型.基于设计反应谱选取15条地震波,经等幅调节扩展至150条地震动,采用动力增量分析(IDA)获取桥梁构件及系统易损性曲线.研究对比两种支座对桥梁抗震韧性的影响,并以震后短期恢复能力量化评估抗震韧性.结果表明,SMA-LRB支座可降低支座损伤概率,最高降幅达28.5%,提升构件抗震韧性6%、整体系统抗震韧性4%,验证了形状记忆合金(SMA)技术在提高桥梁抗震性能方面的有效性.To investigate the shock absorption and resilience effects of shape memory alloy-lead rubber bearings(SMA-LRB),a three-dimensional finite element model of a five-span bridge equipped with both SMA-LRB and lead rubber bearings(LRB)was established.Fifteen ground motions were selected based on the design response spectrum and subsequently scaled to generate a set of 150 seismic records.Incremental dynamic analysis(IDA)was conducted to derive the fragility curves for bridge components and the overall system.The study compared the seismic resilience of bridges with different bearing configurations,with post-earthquake short-term recovery capacity serving as the resilience evaluation metric.The results indicate that SMA-LRB significantly reduce bearing damage probability by up to 28.5%,while improving the seismic resilience of bridge components by 6%and the overall system by 4%.These findings validate the effectiveness of shape memory alloy(SMA)technology in enhancing the seismic performance of simply supported beam bridges.

关 键 词：形状记忆合金-铅芯橡胶复合支座 简支梁桥 抗震韧性 易损性分析 震后恢复能力 

分 类 号：U44[建筑科学—桥梁与隧道工程]