桥面平整度对大跨度悬索桥车桥耦合振动的影响
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摘要
桥面平整度是影响车桥耦合振动的关键因素之一。基于分离法,以车轮与桥面板接触点为界,将车桥耦合振动系统分为车辆、桥面平整度和桥梁结构3个子体系,并假定桥面平整度是均值为零的平稳高斯随机过程;结合DR-PSD函数建立了很平整、一般平整和粗糙3种桥面平整度模型。结合车桥耦合振动分析程序,以某大跨度悬索桥为对象,研究了3种不同桥面平整度下桥梁结构各部分的动力响应特性。研究结果表明:组成大跨度悬索桥各部分的主塔、加劲梁、主缆和吊索,其各自对应的冲击系数之间存在明显的差异,而同一条件下相同部位的内力与位移冲击系数也有较大的差异;车桥耦合振动过程中桥面出现较大的横向位移,对桥面行车安全构成威胁,内力高频交变的主缆及吊索等关键结构易出现疲劳,对此应给予高度关注。
Bridge surface roughness is one of the key aspects to affect the vehicle-bridge coupled vibration.Based on the separated iterative method,taking the wheel and the bridge surface contact as the connection point,this paper divides the vehicle-bridge coupled vibration system into the vehicles,bridge surface roughness and the bridge structure.Supposing the bridge surface roughness is the average value for the zero steady Gauss stochastic process,this paper uses the DR-PSD function to establish very smooth,general smooth and the rough three kind of bridge surface roughness model.Unifying the vehicle-bridge coupled vibration analysis program,taking long-span suspension bridge as the object,this paper studies the each power response characteristic under three kinds of different bridge surface roughness condition.The research conclusion indicates that: as the composition of the long-span suspension bridge each main tower,the stiffen girder,the main cable and the suspension cable respective correspondence impact factor has the obvious differences,and under the same condition the same spot inner force and the displacement attacks the coefficient also have the big differences.The research also finds that in the vehicle-bridge coupled vibration process the bridge surface appears the big lateral displacement,which will pose the threat to the bridge surface driving security,the main cable and the suspension cable inner force assumes the high-frequency change,these essential structure spot easy to appear wearily,so this problem should be given a high attention.
Bridge surface roughness is one of the key aspects to affect the vehicle-bridge coupled vibration.Based on the separated iterative method,taking the wheel and the bridge surface contact as the connection point,this paper divides the vehicle-bridge coupled vibration system into the vehicles,bridge surface roughness and the bridge structure.Supposing the bridge surface roughness is the average value for the zero steady Gauss stochastic process,this paper uses the DR-PSD function to establish very smooth,general smooth and the rough three kind of bridge surface roughness model.Unifying the vehicle-bridge coupled vibration analysis program,taking long-span suspension bridge as the object,this paper studies the each power response characteristic under three kinds of different bridge surface roughness condition.The research conclusion indicates that: as the composition of the long-span suspension bridge each main tower,the stiffen girder,the main cable and the suspension cable respective correspondence impact factor has the obvious differences,and under the same condition the same spot inner force and the displacement attacks the coefficient also have the big differences.The research also finds that in the vehicle-bridge coupled vibration process the bridge surface appears the big lateral displacement,which will pose the threat to the bridge surface driving security,the main cable and the suspension cable inner force assumes the high-frequency change,these essential structure spot easy to appear wearily,so this problem should be given a high attention.
引文
[1]王达.基于有限元模型修正的大跨度悬索桥随机车流车桥耦合振动分析[D].西安:长安大学,2008.
[2]王平山,陈彦江,付金科,等.桥面平整度的极大熵分析[J].哈尔滨建筑大学学报,1995,28(2):115-122.WANG Ping-shan,CHEN Yan-jiang,FU Jin-ke,etal.Deck roughness maximum entropy analysis[J].Journal of Harbin University of Architecture,1995,28(2):115-122.
[3]袁明,余钱华,颜东煌.基于车-桥系统耦合振动理论的大跨PC连续刚构桥冲击系数研究[J].中国公路学报,2008,21(1):72-76,120.YUAN Ming,YU Qian-hua,YAN Dong-huang.Re-search on impact coefficient for PC continuous rigidframe bridges with long-span under theory of vehicle-bridge system coupling vibration[J].China Journal ofHighway and Transport,2008,21(1):72-76,120.
[4]宋一凡,陈榕峰.基于路面不平整度的车辆振动响应分析方法[J].交通运输工程学报,2007,7(4):39-43.SONG Yi-fan,CHEN Rong-feng.Analysis method ofvehicle vibration response caused by pavement rough-ness[J].Journal of Traffic and Transportation Engi-neering,2007,7(4):39-43.
[5]王钧利,贺拴海.高墩大跨径连续刚构弯桥全过程非线性稳定分析[J].长安大学学报:自然科学版,2008,28(3):49-52.WANG Jun-li,HE Shuan-hai.Nonlinear stability oflong-span curve rigid bridge with high piers in wholeprocess[J].Journal of Chang an University:NaturalScience Edition,2008,28(3):49-52.
[6]周敉,王君杰,袁万城.自锚式悬索桥地震反应有限元分析[J].长安大学学报:自然科学版,2008,28(1):66-72.ZHOU Mi,WANG Jun-jie,YUAN Wan-cheng.Seis-mic response analysis and simulation of self-anchoredsuspension bridge based on ANSYS[J].Journal ofChang an University:Natural Science Edition,2008,28(1):66-72.
[7]王钧利,贺拴海.高墩大跨径弯桥在悬臂施工阶段刚构的非线性稳定分析[J].交通运输工程学报,2006,6(2):30-34.WANG Jun-li,HE Shuan-hai.Nonlinear stabilityanalysis of long-span curve bridge with high piersduring cantilever construction[J].Journal of Trafficand Transportation Engineering,2006,6(2):30-34.
[8]方志,李红芳,彭波.体外CFRP预应力筋混凝土梁的受力性能[J].中国公路学报,2008,21(3):40-47.FANG Zhi,LI Hong-fang,PENG Bo.Mechanical be-haviors of concrete beam of external prestressedCFRP tendons[J].China Journal of Highway andTransport,2008,21(3):40-47.
[9]肖艳军,李建勋.基于小波变换的信号滤波在探地雷达中的应用[J].电波科学学报,2006,21(1):140-145,149.XIAO Yan-jun,LI Jian-xun.Signal filtering based onwavelet transform and its application in ground pene-trating radar[J].Chinese Journal of Radio Science,2006,21(1):140-145,149.
[10]JTG D60—2004,公路桥涵通用设计规范[S].
[11]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.
[12]Yang Y B,Yau J D,Hsu L C.Vibration of simplebeams due to trains moving at high speeds[J].Engi-neering Structures,1997,19(11):936-944.
[13]GB 7031—86,车辆振动输入路面平整度表示方法[S].
[14]Huang D Z,Ton L,Shahawy M.Dynamic behavior ofhorizontally curved I-girder bridge[J].Computers andStructures,1995,121(9):1330-1337.
[15]Huang D Z,Wang T L,Shahawy M.Vibration of thin-walled box-girder bridges excited by vehicles[J].Journal of Structural Engineering New York,N.Y,1995,121(9):1330-1337.
[2]王平山,陈彦江,付金科,等.桥面平整度的极大熵分析[J].哈尔滨建筑大学学报,1995,28(2):115-122.WANG Ping-shan,CHEN Yan-jiang,FU Jin-ke,etal.Deck roughness maximum entropy analysis[J].Journal of Harbin University of Architecture,1995,28(2):115-122.
[3]袁明,余钱华,颜东煌.基于车-桥系统耦合振动理论的大跨PC连续刚构桥冲击系数研究[J].中国公路学报,2008,21(1):72-76,120.YUAN Ming,YU Qian-hua,YAN Dong-huang.Re-search on impact coefficient for PC continuous rigidframe bridges with long-span under theory of vehicle-bridge system coupling vibration[J].China Journal ofHighway and Transport,2008,21(1):72-76,120.
[4]宋一凡,陈榕峰.基于路面不平整度的车辆振动响应分析方法[J].交通运输工程学报,2007,7(4):39-43.SONG Yi-fan,CHEN Rong-feng.Analysis method ofvehicle vibration response caused by pavement rough-ness[J].Journal of Traffic and Transportation Engi-neering,2007,7(4):39-43.
[5]王钧利,贺拴海.高墩大跨径连续刚构弯桥全过程非线性稳定分析[J].长安大学学报:自然科学版,2008,28(3):49-52.WANG Jun-li,HE Shuan-hai.Nonlinear stability oflong-span curve rigid bridge with high piers in wholeprocess[J].Journal of Chang an University:NaturalScience Edition,2008,28(3):49-52.
[6]周敉,王君杰,袁万城.自锚式悬索桥地震反应有限元分析[J].长安大学学报:自然科学版,2008,28(1):66-72.ZHOU Mi,WANG Jun-jie,YUAN Wan-cheng.Seis-mic response analysis and simulation of self-anchoredsuspension bridge based on ANSYS[J].Journal ofChang an University:Natural Science Edition,2008,28(1):66-72.
[7]王钧利,贺拴海.高墩大跨径弯桥在悬臂施工阶段刚构的非线性稳定分析[J].交通运输工程学报,2006,6(2):30-34.WANG Jun-li,HE Shuan-hai.Nonlinear stabilityanalysis of long-span curve bridge with high piersduring cantilever construction[J].Journal of Trafficand Transportation Engineering,2006,6(2):30-34.
[8]方志,李红芳,彭波.体外CFRP预应力筋混凝土梁的受力性能[J].中国公路学报,2008,21(3):40-47.FANG Zhi,LI Hong-fang,PENG Bo.Mechanical be-haviors of concrete beam of external prestressedCFRP tendons[J].China Journal of Highway andTransport,2008,21(3):40-47.
[9]肖艳军,李建勋.基于小波变换的信号滤波在探地雷达中的应用[J].电波科学学报,2006,21(1):140-145,149.XIAO Yan-jun,LI Jian-xun.Signal filtering based onwavelet transform and its application in ground pene-trating radar[J].Chinese Journal of Radio Science,2006,21(1):140-145,149.
[10]JTG D60—2004,公路桥涵通用设计规范[S].
[11]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.
[12]Yang Y B,Yau J D,Hsu L C.Vibration of simplebeams due to trains moving at high speeds[J].Engi-neering Structures,1997,19(11):936-944.
[13]GB 7031—86,车辆振动输入路面平整度表示方法[S].
[14]Huang D Z,Ton L,Shahawy M.Dynamic behavior ofhorizontally curved I-girder bridge[J].Computers andStructures,1995,121(9):1330-1337.
[15]Huang D Z,Wang T L,Shahawy M.Vibration of thin-walled box-girder bridges excited by vehicles[J].Journal of Structural Engineering New York,N.Y,1995,121(9):1330-1337.
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