地震作用下高墩刚构桥行车安全性分析
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摘要
为分析地震作用下高速列车通过高墩刚构桥的行车安全性,基于列车-轨道-桥梁动力相互作用理论,用三层弹性点支撑梁模型模拟有砟轨道结构、大质量法处理地震力边界条件,建立了地震作用下的列车-轨道-桥梁耦合振动模型。以一座跨度为(88+168+88)m的高墩刚构桥为工程实例,计算了El Centro地震动作用下车桥系统的动力响应。分析结果表明:地震作用下高墩刚构桥的面内和面外动力响应存在弱耦合性,列车的行车安全性随地震动幅值、车速的提高而降低;对于该高墩刚构桥,横向地震动对桥上列车的行车安全威胁最大;多遇地震作用下,ICE3高速列车在7~9度地震区的行车安全阈值分别为275、250和225 km/h。
In order to analyze the running safety in case of a high-speed train running over a high-pier rigid frame bridge subjected to earthquake action,a coupling vibration model of seismic-train-track-bridge was set up on the basis of the train-track-bridge dynamic interaction theory. In this model,the seismic action was solved by the large mass method and the ballast track was simulated by the elastic point support model with three layers. As an example,a high-pier rigid frame bridge with spans of( 88 + 168 + 88) m was modeled,and the dynamic responses of vehicle and bridge system under El Centro seismic ground motion were calculated. The analysis results show that the dynamic responses of the high-pier rigid frame bridge present weak coupling in plane and out plane,moreover the running safety of the train is decreased along with the increase of seismic amplitude and train speed. In addition,the greatest threat to the running safety of the train on bridge is in transverse direction,and the running safety thresholds of ICE3 subjected to frequent earthquake with intensity VII,VIII and IX are 275,250 and 225 km / h respectively.
引文
[1]Xia H,Han Y,Zhang N,et al.Dynamic analysis of train-bridge system subjected to non-uniform seismic excitations[J].Earthquake Engineering&Structural Dynamics,2006,35(12):1563-1579.
    [2]Zhang N,Xia H,DeRoeck G.Dynamic analysis of a train-bridge system under multi-support seismic excitations[J].Journal of Mechanical Science and Technology,2010,24(11):2181-2188.
    [3]Yang Y B,Wu Y S.Dynamic Stability of Trains Moving over Bridge Shaken by Earthquakes[J].Sound&Vibration,2002,258(1):65-94.
    [4]韩艳,夏禾,张楠.考虑非一致地震输入的车—桥系统动力响应分析[J].中国铁道科学,2006,27(05):46-53.HAN Yan,XIA He,ZHANG Nan.Dynamic response analysis of train-bridge system under non-uniform seismic excitations[J].China Railway Science,2006,27(5):46-53.(in Chinese)
    [5]王少林,翟婉明.地震作用下高速列车-线路-桥梁系统动力响应[J].西南交通大学学报,2011(1):56-62.WANG Shaolin,ZHAI Wanming.Dynamic responses of high-speed train-track-bridge system under seismic excitations[J].Journal of Southwest Jiaotong University,2011(1):56-62.(in Chinese)
    [6]邓子铭,郭向荣,张志勇.地震作用对钢桁梁桥车桥系统耦合振动的影响分析[J].中南大学学报:自然科学版,2011,42(1):184-191.DENG Ziming,GUO Xiangrong,ZHANG Zhiyong.Coupled vibration of train-bridge system of steel truss bridge with seismic effect[J].Journal of Central South University:Science and Technology,2011,42(1):184-191.(in Chinese)
    [7]熊建珍,高芒芒,俞翰斌.天兴洲长江大桥斜拉桥在地震作用下的车-桥耦合振动分析[J].中国铁道科学,2006,27(5):54-59.XIONG Jianzhen,GAO Mangmang,YU Hanbin.Vehicle-bridge coupling vibration analysis of cable stayed bridge of tianxingzhou yangtze river bridge under earthquakes[J].China Railway Science,2006,27(5):54-59.(in Chinese)
    [8]李小珍.高速铁路列车-桥梁系统耦合振动理论及应用研究[D].成都:西南交通大学,2000.LI Xiaozhen.Studies on Theory and application of train-bridge system coupling vibration in high-speed railway[D].Chengdu:Southwest Jiaotong University,2000.(in Chinese)
    [9]Shen Z Y,Hedrick J K,Elkins J A.A comparison of alternative creep-force models for rail vehicle dynamic analysis[C].8th IAVSDSymp,Cambridge,Ma.1984,591-605.
    [10]翟婉明,夏禾.列车-轨道-桥梁动力相互作用理论与工程应用[M].北京:科学出版社,2011.ZHAI Wanming,XIA He.Train-track-bridge dynamic interaction theory and engineering application[M].Beijing:Science Press,2011.(in Chinese)
    [11]GB 50111-2006铁路工程抗震设计规范[S](2009年版).北京:中国计划出版社,2009.GB 50111-2006 Code for Seismic Design of Railway Engineering[S](2009 Edition).Beijing:China Planning Press,2009.(in Chinese)

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