新型U型梁车桥耦合环境振动实测与分析
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摘要
为探讨城市轨道交通U型梁车桥系统车桥耦合振动对周边环境的影响,采用线性化轮轨模型建立了31个自由度的车辆动力学模型。以重庆市轨道交通一号线工程中梁山以西高架区间所采用标准跨径为30m的单线小U结构为对象,采用自编程序和通用对机车车辆过桥时的车桥耦合振动进行了分析,实测了周边地面受到车桥耦合振动的响应,并通过计算与实测结果的对比分析对所建立的理论模型和编制的程序进行了验证,对U梁引起的环境振动进行了评价。结果表明,U型梁具有良好的环境振动控制效果。
This paper purposes exploring the influence of dynamic responses of U-girder in vehicle-bridge system for urban rail transit on the surrounding environment.In order to study the influence,a rail vehicle dynamic model with 31 DOFs(degrees of freedom) is made by employing the linear rail model.A standard span of 30m single line U-shaped structure,which is in the elevated section of Chongqing City Metro Line Project in the west of Liang hill,is taken as the study object.The analysis of coupling vibration in vehicle-bridge system is performed by using a self-compiled program and compared with field test results to confirm the correctness of the dynamic model and the self-compiled program.Through the calculation and the analysis of measurement results,the environmental vibration induced by U-girder is evaluated.The results show that U-girder has remarkable effect on the environmental vibration control.
This paper purposes exploring the influence of dynamic responses of U-girder in vehicle-bridge system for urban rail transit on the surrounding environment.In order to study the influence,a rail vehicle dynamic model with 31 DOFs(degrees of freedom) is made by employing the linear rail model.A standard span of 30m single line U-shaped structure,which is in the elevated section of Chongqing City Metro Line Project in the west of Liang hill,is taken as the study object.The analysis of coupling vibration in vehicle-bridge system is performed by using a self-compiled program and compared with field test results to confirm the correctness of the dynamic model and the self-compiled program.Through the calculation and the analysis of measurement results,the environmental vibration induced by U-girder is evaluated.The results show that U-girder has remarkable effect on the environmental vibration control.
引文
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[9]陈建国,夏禾,陈树礼.运行列车引起的周围地面振动规律研究[J].工程力学,2010,27(1):98-103.
[10]陈建国.高架轨道交通引起的环境振动预测与参数研究[D].北京:北京交通大学,2010.CHEN Jianguo.Prediction and parameters esearch on iaduct Train-induced ennvironmental vibrations[D].Bei Jing:Beijing Jiaotong University,2010.(in Chinese)
[11]Chen Y J,Ju S H,Ni S H,et al.Prediction methodology for ground vibration induced by passing trains on bridge structures[J].Journal of Soundand Vibration,2007,302:806-820.
[12]Yau J D,Wu Y S,Yang Y B.Impact response of bridges with elastic bearings to moving loads[J].Journal of Sound and Vibration,2001,248:9-30.
[13]Wu Yean-Seng,Yang Yeong-Bin.A semi-analytical approach for analyzing ground vibrations caused by trains moving over elevated bridges[J].Soil Dynamics and Earthquake Engineering,2004,24:949-9l2.
[14]Shen X,Jones C,Petyt M.Ground vibration generated by a load moving along a railway track[J].Journal of Sound and Vibration,1999,228(1):129-15l.
[15]IS02631/1Mechanical vibration and shock-evaluation of human exposure to whole body vibration-part1:general requirements[S].1997.
[2]夏禾,张楠,曹艳梅.列车对周围地面及建筑物振动影响的试验研究[J].铁道学报,2004,26(4):93-98.XIA He,ZHANG Nan,CAO Yanmei.Experimental study of train-1nduced vidrations of grand and nearby building[J].Journal of the China RailwaySociety,2004,26(4):93-98.(in Chinese)
[3]刘晶波,王振宇.波动问题中的三维时域粘弹性人工边界[J].工程力学,2005,22(6):47-50.LIU Jingbo,WANG Zhenyu.Visco-elastic aritifical boundaries in time domain for wave motion Problem[J]Engineering Mechanics,2005,22(6):47-50.(in Chinese)
[4]王彬力.城市轨道交通U型梁结构静动力行为研究[D].成都:西南交通大学,2011.WANG Binli.Structural static and dynamic analysis of U-girder for urban rail transit[D].Cheng Du:Southwest Jiaotong University,2011.
[5]闫维明,聂晗,任珉,等.地铁交通引起的环境振动的实测与分析[J].地震工程与工程震动,2009,20(4):187-191.YAN Weiming NIE Han,REN Min.Insitu experiment and analysis of environmenttal vibration induced by Urban subway transit[J].Journal ofEarthquake Engineering and Engineering vibration,2009,20(4):187-191.(in Chinese)
[6]魏鹏勃,夏禾,陈建国,等.高架轨道交通引起的地面振动理论与试验研究[J].工程力学,2009,26(10):117-122.WEI Pengbo,XIA He,CHEN Jianguo.Theoretical and experimental study on environmental vibrations induced by trains on viaduct[J].EngineeringMechanics.2009,26(10):117-122.(in Chinese)
[7]蒋通,张昕.高架轨道交通引起环境振动的实测与数值模拟[J].同济大学学报,2004,32(5):565-569.JIANG Tong,ZHANG Xin.In situ experimental and numberical predictions environmental vibration by urban viaduct rail transit[J].Jouran ofTongji University,2004,32(5):565-569.(in Chinese)
[8]曹艳梅,夏禾.运行列车对高层建筑结构的振动影响[J].工程力学,2006,23(3):162-167.CAO Yanmei,XIA He.Vibrations of high-rise buildings induced by running trains[J].Engineering Mechanics,2006,23(3):162-167.(in Chi-nese)
[9]陈建国,夏禾,陈树礼.运行列车引起的周围地面振动规律研究[J].工程力学,2010,27(1):98-103.
[10]陈建国.高架轨道交通引起的环境振动预测与参数研究[D].北京:北京交通大学,2010.CHEN Jianguo.Prediction and parameters esearch on iaduct Train-induced ennvironmental vibrations[D].Bei Jing:Beijing Jiaotong University,2010.(in Chinese)
[11]Chen Y J,Ju S H,Ni S H,et al.Prediction methodology for ground vibration induced by passing trains on bridge structures[J].Journal of Soundand Vibration,2007,302:806-820.
[12]Yau J D,Wu Y S,Yang Y B.Impact response of bridges with elastic bearings to moving loads[J].Journal of Sound and Vibration,2001,248:9-30.
[13]Wu Yean-Seng,Yang Yeong-Bin.A semi-analytical approach for analyzing ground vibrations caused by trains moving over elevated bridges[J].Soil Dynamics and Earthquake Engineering,2004,24:949-9l2.
[14]Shen X,Jones C,Petyt M.Ground vibration generated by a load moving along a railway track[J].Journal of Sound and Vibration,1999,228(1):129-15l.
[15]IS02631/1Mechanical vibration and shock-evaluation of human exposure to whole body vibration-part1:general requirements[S].1997.
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