高速铁路桥梁地震动放大系数研究
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摘要
高速铁路桥梁作为高速铁路的重要组成部分,其动力特性直接影响高速列车运行的安全性。本文基于我国高速铁路高架桥梁常用结构形式的实际数据,运用Midas/Civil软件建立高速铁路桥梁的典型结构形式,即多跨简支梁桥的全桥模型,建立了14个计算工况下的桥梁模型,选择不同场地及频谱特性的地震波30条,通过时程分析方法得到桥梁横桥向动力响应放大系数420个,经过统计分析给出了放大系数95%的概率保证值,并检验了动力放大系数的概率分布特征。
The dynamic characteristics of high-speed railway viaduct,as an important part of high-speed railway system,directly affect the safety of high-speed train. In this paper,based on the actual physical data of typical structure of high-speed railway viaduct,a large amount of calculation is carried on by finite element analysis method. All the 14 3-D finite element models with different type structures of high-speed railway viaduct are built by the Midas / Civil program. And 30 earthquake records which represent different types of soil conditions and frequency characters are selected as input excitations. Finally the 420 dynamic amplification factors are present and the 95%assurance probability of these values is given,and the probability distribution character of the dynamic amplification factors is studied.
The dynamic characteristics of high-speed railway viaduct,as an important part of high-speed railway system,directly affect the safety of high-speed train. In this paper,based on the actual physical data of typical structure of high-speed railway viaduct,a large amount of calculation is carried on by finite element analysis method. All the 14 3-D finite element models with different type structures of high-speed railway viaduct are built by the Midas / Civil program. And 30 earthquake records which represent different types of soil conditions and frequency characters are selected as input excitations. Finally the 420 dynamic amplification factors are present and the 95%assurance probability of these values is given,and the probability distribution character of the dynamic amplification factors is studied.
引文
[1]钱立新.世界高速铁路技术[M].北京:中国铁道出版社,2003.QIAN Lixin.Technology of high speed railway in the world[M].BEIJING:China Railway Publishing House,2003.(in Chinese)
[2]刘林.京沪高速铁路地震预警系统的方案及关键参数研究[J].中国安全科学学报,2002,12(2):75-79.LIU Lin.Study on schemes and key parameters of seismic alarm system for Beijing-Shanghai express railway[J]China safety science journal,2002,12(2):75-79.(in Chinese)
[3]陈令坤等.高速铁路简支梁桥地震反应特性研究[J].振动与冲击,2011,30(12).CHEN Linkun.Seismic response characters of a high speed railway simply-supported girder bridge[J].Journal of vibration and shock,2011,30(12).(in Chinese)
[4]夏禾,陈英俊.车-梁-墩体系动力相互作用分析[J].土木工程学报,1992,25(2):3-12.XIA He,CHEN Yinjun.Analysis of the lateral dynamic interaction in vehicle-girder-pier system[J].China Civil Engineering Journal,1992,25(2):3-12.(in Chinese)
[5]张楠,夏禾.铁路桥梁在高速列车作用下的动力响应分析[J].工程力学,2005,22(3):144-151.ZHANG Nan.XIA He.Dynamic analysis ofrailway bridge under high speed train[J].Engineer mechnics,2005,22(3):144-151.(in Chinese)
[6]JD Yau.Dynamic response analysis of suspended beams subjected to moving vehicles and multiple support excitations.Journal of Sound and Vibration,2009,325(4-5):907-922.
[7]JD Yau,L Fryba.Response of suspended beams due to moving loads andvertical seismic ground excitations.Engineering Structures,2007,29(12):3255~3262.
[8]林玉森.地震作用下高速铁路桥上列车走行性研究[D].成都:西南交通大学,2007.LIN Yuseng.Study on Train Runnabilities during Earthquake on High-Speed Railway Bridge[D].Chengdu:South West Jiao Tong University,2007.(in Chinese)
[9]谭长建,祝兵.地震作用下高速列车与桥梁稱合振动分析[J].振动与冲击,2009,28(1):4-8.TAN Changjian,ZHU Bing.Coupled vibration analysis of high speed train and bridge subject to seismic excitation[J].Journal of vibration and shock,2009,28(1):4-8.(in Chinese)
[10]齐国红.高速铁路地震安全监测预警系统的预警水平研究.[D].北京:北方交通大学,2000.QI Guohong.The study of warning level under urgent earthquake detection and alarm system for high speed railway.Beijing,Northern Jiaotong University,2000.(in Chinese)
[11]叶爱君等.桥梁支座抗震性能的模拟分析[J].同济大学学报,2001,29(1):7-10.YE Aijun.Simulation of seismic behavior for bridge bearings[J].Journal of Tongji University,2001,29(1):7-10.(in Chinese)
[12]范立础.高架桥梁抗震设计[M].北京:人民交通出版社,2001.FAN Lichu.Seismic design for highway bridge[M].Beijing:China Communications Press,2001.(in Chinese)
[2]刘林.京沪高速铁路地震预警系统的方案及关键参数研究[J].中国安全科学学报,2002,12(2):75-79.LIU Lin.Study on schemes and key parameters of seismic alarm system for Beijing-Shanghai express railway[J]China safety science journal,2002,12(2):75-79.(in Chinese)
[3]陈令坤等.高速铁路简支梁桥地震反应特性研究[J].振动与冲击,2011,30(12).CHEN Linkun.Seismic response characters of a high speed railway simply-supported girder bridge[J].Journal of vibration and shock,2011,30(12).(in Chinese)
[4]夏禾,陈英俊.车-梁-墩体系动力相互作用分析[J].土木工程学报,1992,25(2):3-12.XIA He,CHEN Yinjun.Analysis of the lateral dynamic interaction in vehicle-girder-pier system[J].China Civil Engineering Journal,1992,25(2):3-12.(in Chinese)
[5]张楠,夏禾.铁路桥梁在高速列车作用下的动力响应分析[J].工程力学,2005,22(3):144-151.ZHANG Nan.XIA He.Dynamic analysis ofrailway bridge under high speed train[J].Engineer mechnics,2005,22(3):144-151.(in Chinese)
[6]JD Yau.Dynamic response analysis of suspended beams subjected to moving vehicles and multiple support excitations.Journal of Sound and Vibration,2009,325(4-5):907-922.
[7]JD Yau,L Fryba.Response of suspended beams due to moving loads andvertical seismic ground excitations.Engineering Structures,2007,29(12):3255~3262.
[8]林玉森.地震作用下高速铁路桥上列车走行性研究[D].成都:西南交通大学,2007.LIN Yuseng.Study on Train Runnabilities during Earthquake on High-Speed Railway Bridge[D].Chengdu:South West Jiao Tong University,2007.(in Chinese)
[9]谭长建,祝兵.地震作用下高速列车与桥梁稱合振动分析[J].振动与冲击,2009,28(1):4-8.TAN Changjian,ZHU Bing.Coupled vibration analysis of high speed train and bridge subject to seismic excitation[J].Journal of vibration and shock,2009,28(1):4-8.(in Chinese)
[10]齐国红.高速铁路地震安全监测预警系统的预警水平研究.[D].北京:北方交通大学,2000.QI Guohong.The study of warning level under urgent earthquake detection and alarm system for high speed railway.Beijing,Northern Jiaotong University,2000.(in Chinese)
[11]叶爱君等.桥梁支座抗震性能的模拟分析[J].同济大学学报,2001,29(1):7-10.YE Aijun.Simulation of seismic behavior for bridge bearings[J].Journal of Tongji University,2001,29(1):7-10.(in Chinese)
[12]范立础.高架桥梁抗震设计[M].北京:人民交通出版社,2001.FAN Lichu.Seismic design for highway bridge[M].Beijing:China Communications Press,2001.(in Chinese)
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