形状记忆合金摩擦摆隔震连续梁桥性能提升分析  

Performance enhancement analysis of seismically isolated continuous bridge with shape memory alloy friction pendulum bearings

作　　者：刘彦辉[1,2,3] 姚嘉栋 郑文智 谭平 周福霖[1,2,3] Liu Yanhui;Yao Jiadong;Zheng Wenzhi;Tan Ping;Zhou Fulin(School of Civil Engineering and Transportation,Guangzhou University,Guangzhou 510006,China;Earthquake Engineering Research and Test Center,Guangzhou University,Guangzhou 510006,China;Key Laboratory of Earthquake Resistance Earthquake Mitigation and Structural Safety of Ministry of Education,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]广州大学土木与交通工程学院,广州510006 [2]广州大学工程抗震研究中心,广州510006 [3]广州大学工程抗震减震与结构安全教育部重点实验室,广州510006

出　　处：《东南大学学报（自然科学版）》2024年第6期1365-1376,共12页Journal of Southeast University：Natural Science Edition

基　　金：国家重点研发计划资助项目(2021YFE0112200);国家自然科学基金资助项目(52108278,52378293);广东省基础与应用基础研究基金资助项目(2023A1515012681)。

摘　　要：为提升摩擦摆支座隔震连续梁桥的抗震性能,提出了形状记忆合金摩擦摆(SMAFP)及隔震连续梁桥多目标参数优化方法.推导了SMAFP力学模型;基于OpenSees平台分别建立了摩擦摆支座与形状记忆合金索数值模型,并通过试验验证了数值模型的准确性,进一步建立了SMAFP的数值模型.基于此,选取某三跨隔震连续梁桥,采用所提出的优化方法开展SMAFP隔震连续梁桥隔震参数优化设计,并基于最优隔震参数进一步研究了优化方法的适用性与SMAFP隔震连续梁桥的抗震性能.结果表明:采用最优参数的隔震连续梁桥的支座残余位移显著减小,2组地震动作用下的减幅分别达47.1%和44.7%,主梁峰值位移减幅分别达7.8%和11.4%,墩底剪力与墩底弯矩最大增幅分别达8.8%和9.6%.To improve the seismic performance of seismically isolated continuous bridge with friction pendulum(FP)bearings,a shape memory alloy friction pendulum(SMAFP)and multi-objective parameter optimization method for seismically isolated continuous bridges were proposed.The mechanical model of SMAFP was derived.The numerical models of FP bearings and shape memory alloy(SMA)cables were created based on the OpenSees platform,and the accuracy of the numerical models were verified based on the test results.The numerical model of SMAFP was further achieved.Based on the verified numerical model,by selecting a three-span seismically isolated continuous bridge,the optimal design of isolation parameter for seismically isolated continuous bridge with SMAFPs was conducted based on the proposed optimization method.The applicability of the optimization method and the seismic performance of seismically isolated continuous bridge with SMAFPs were further investigated based on the optimum isolation parameters.Results show that the bearing residual displacements of seismically isolated continuous bridge with SMAFPs using optimum parameters are significantly reduced by 47.1%and 44.7%under two groups of earthquakes,respectively.The peak displacements of the main girder are reduced by 7.8%and 11.4%,respectively.The maximum increments of the base shear force and bending moment of the piers reach 8.8%and 9.6%,respectively.

关 键 词：隔震连续梁桥 摩擦摆支座 形状记忆合金 模型验证 参数优化 性能提升 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]