行波效应对大跨度连续刚构桥地震反应的影响
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摘要
利用大型结构分析程序ANSYS/TRANSIENT,对地震波三向正交分量独立作用和联合作用下连续刚构桥的地震反应的行波效应进行了时程分析的数值模拟,分析了连续刚构桥在各向振动分量的作用,以及各向振动不同相位差的行波效应,对其地震反应的一般影响规律进行了讨论。结果表明:在地震波的各单向行波效应和三向正交行波效应时,结构的内力均有不同程度的增大,而结构的位移却呈现减少的趋势,结构的振动周期延长。
The advanced finite element analysis program ANSYS/TRANSIENT is successfully used in numerical simulation of seismic response of rigid-framed bridge to traveling wave exciting from three dimensional orthogonal components acting individually or jointly.It is studied to the effects of traveling wave in different direction and phase lag.The general influence of traveling wave in the long span rigid-framed bridge is obtained: when considering single or three dimensional traveling wave,the internal force of structure increases in the different extent and the natural period becomes longer,however,the structural displacement decreases.5 tabs,7 figs,13 refs.
The advanced finite element analysis program ANSYS/TRANSIENT is successfully used in numerical simulation of seismic response of rigid-framed bridge to traveling wave exciting from three dimensional orthogonal components acting individually or jointly.It is studied to the effects of traveling wave in different direction and phase lag.The general influence of traveling wave in the long span rigid-framed bridge is obtained: when considering single or three dimensional traveling wave,the internal force of structure increases in the different extent and the natural period becomes longer,however,the structural displacement decreases.5 tabs,7 figs,13 refs.
引文
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[12]刘健新,张伟,张茜.洛河特大桥抗震性能计算[J].交通运输工程学报,2006,6(1):57-62.LIU Jian-xin,ZHANG Wei,ZHANG Qian.Anti-seismic performance calculation of Luohe bridge[J].Journal of Traffic and Transportation Engineering,2006,6(1):57-62.
[13]周敉,贺拴海,袁万城.RC梁桥承载力的振动测试评估方法[J].交通运输工程学报,2006,6(3):62-67.ZHOU Mi,HE Shuan-hai,YUAN Wan-cheng.Capacity evaluation of RC girder bridge with vibrationtesting technique[J].Journal of Traffic andTransportation Engineering,2006,6(3):62-67.
[2]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,2002.
[3]JTJ 004-89,公路工程抗震设计规范[S].
[4]GB 50011-2001,建筑抗震设计规范[S].
[5]范立础.桥梁抗震[M].上海:同济大学出版社,1996.
[6]Dendrou B,Werner S,Toridis T.Three-dimensionalresponse of a concrete bridge system to travelingseismic waves[J].Computers&Structures,1985,20(1-3):593-603.
[7]Ahmed M,Abdel G,Richard G.Stringfellow,responseof suspension bridges to traveling earthquake excitations:Part II-lateral response[J].International Journal of SoilDynamics and Earthquake Engineering,1984,3(2):73-81.
[8]李忠献,史志利.行波激励下大跨度连续刚构桥的地震反应分析[J].地震工程与工程振动,2003,23(2):68-76.LI Zhong-xian,SHI Zhi-li.Seismic response analysisfor long-span continuous rigid-framed bridges underexcitation of traveling waves[J].EarthquakeEngineering and Engineering Vibration,2003,23(2):68-76.
[9]宋一凡.公路桥梁动力学[M].北京:人民交通出版社,2001.
[10]李忠献,黄健,丁阳,等.不同地震激励下大跨度斜拉桥的地震反应分析[J].中国公路学报,2005,18(3):48-53.LI Zhong-xian,HUANG Jian,DING Yang,et al.Seismic responses of long-span cable-stayed bridgesunder different patterns of earthquake excitations[J].China Journal of Highway and Transport,2005,18(3):48-53.
[11]向天宇,赵人达.大跨度拱在空间变化的非平稳随机地震动作用下的随机响应[J].中国公路学报,2001,14(1):39-41.XIANG Tian-yu,ZHAO Ren-da.Random responseof long span arch under spatially variable seismicexcitation[J].China Journal of Highway andTransport,2001,14(1):39-41.
[12]刘健新,张伟,张茜.洛河特大桥抗震性能计算[J].交通运输工程学报,2006,6(1):57-62.LIU Jian-xin,ZHANG Wei,ZHANG Qian.Anti-seismic performance calculation of Luohe bridge[J].Journal of Traffic and Transportation Engineering,2006,6(1):57-62.
[13]周敉,贺拴海,袁万城.RC梁桥承载力的振动测试评估方法[J].交通运输工程学报,2006,6(3):62-67.ZHOU Mi,HE Shuan-hai,YUAN Wan-cheng.Capacity evaluation of RC girder bridge with vibrationtesting technique[J].Journal of Traffic andTransportation Engineering,2006,6(3):62-67.
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