桥墩形式对曲线形连续刚构桥地震响应的影响
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摘要
以西牛大桥为工程背景,将主墩分别设计为单柱式薄壁墩、双柱式薄壁墩和组合式墩柱3种形式,运用Midas/Civil软件对高墩大跨曲线形连续刚构桥进行三维地震动态时程分析,比较不同的桥墩形式以及曲率半径对高墩大跨曲线形连续刚构桥抗震性能的影响。分析结果表明,在主梁弯矩分配上,双肢墩和组合墩要优于单肢墩,而在主梁位移与墩顶轴力方面,组合墩也具有明显的优势;在桥墩形式不变的情况下,随着曲率半径的增大,主梁跨中弯矩和竖向位移先出现明显的减小,之后趋于平缓。
Regarded Xiniu Bridge as the background,the main piers were designed to be single-column thin-wall piers,double column type thin-wall piers and combined type piers respectively.Using Midas/Civil,this paper made a three-dimensional seismic time-history analysis for high-piers long-span curved continuous rigid frame bridge,compared and analyzed the seismic performances in different pier types and curvature radius.The results show that,in girder bending moment distribution,the bridge in double column type performed better than combined type.As to girder displacement and axial force in pier-top,the combined type had an obvious advantage.When the curvature radius grow in a certain pier type,the bending moment and vertical displacement in midspan decrease evidently at first,then become flat.
Regarded Xiniu Bridge as the background,the main piers were designed to be single-column thin-wall piers,double column type thin-wall piers and combined type piers respectively.Using Midas/Civil,this paper made a three-dimensional seismic time-history analysis for high-piers long-span curved continuous rigid frame bridge,compared and analyzed the seismic performances in different pier types and curvature radius.The results show that,in girder bending moment distribution,the bridge in double column type performed better than combined type.As to girder displacement and axial force in pier-top,the combined type had an obvious advantage.When the curvature radius grow in a certain pier type,the bending moment and vertical displacement in midspan decrease evidently at first,then become flat.
引文
[1]潘强,方诗圣,程晓东.高墩大跨连续刚构桥地震反应的行波效应研究[J].湖南工程学院学报:自然科学版,2010(2):82-85.PAN Qiang,FANG Shi-sheng,CHENG Xiao-dong.Seismic response of the long-span continuous rigid frame bridge with high-rise piers traveling wave effect research[J].Journal of Hunan Institute of Engineering:Nnatural Science Edition,2010(2):82-85.
[2]陈兴冲,吴海燕,张永亮.行波效应对铁路大跨长联连续刚构桥地震反应的影响[J].世界地震工程,2010(1):191-196.CHEN Xing-chong,WU Hai-yan,ZHANG Yong-liang.The effect of traveling waves on seismic response of railway long-span and long-conjunction continuous rigidframe bridges under multi-support excitations[J].World Earthquake Engineering,2010(1):191-196.
[3]石雄伟,刘海鹏,周勇军,等.双薄壁墩间距对连续刚构桥地震响应的影响[J].交通运输工程学报,2010(3):35-40.SHI Xiong-wei,LIU Hai-peng,ZHOU Yong-jun,et al.Effect of double-thin-wall distance on seismic response of continuous rigid frame bridge[J].Journal of Traffic and Transportation Engineering,2010(3):35-40.
[4]谢肖礼,王波,张伟峰.罕遇地震作用下高墩连续刚构桥双重非线性抗震分析[J].工程力学,2009(4)113-118.XIE Xiao-li,WANG Bo,ZHANG Wei-feng.Double nonlinear aseismic analysis of high-rise pier and rigid frame bridges under rear earthquake[J].Engineering Mechanics,2009(4):113-118.
[5]陈彦,文华斌.地震作用下高墩大跨连续刚构桥几何非线性影响研究[J].铁道建筑,2013(7):15-19.CHEN Yan,WEN Hua-bin.Earthquake under the action of long-span continuous rigid frame bridge with high-rise piers geometric nonlinear impact study[J].Railway Engineering,2013(7):15-19.
[6]何钦象,田小红,宋丹.高墩大跨径连续刚构桥抗震性能评估[J].振动与冲击,2009(1):68-71.HE Qin-xiang,TIAN Xiao-hong,SONG dan.Seismic assessment of long-span continuous rigid frame bridge with high-rise piers[J].Journal of Vibration and Shock,2009(1):68-71.
[7]Long Pei-heng,JIANG Rong.Seismic response analysis of curved continuous rigid frame bridge under multi-support excitation[J].IET Conference Publications,2011(3):109-119.
[8]冯江晓,董军.曲率半径变化对特大跨径连续刚构桥抗震性能影响的规律研究[A].第23届全国结构工程学术会议文集[C].北京:工程力学杂志社,2014.FENG jiang-xiao,DONG jun.Study on the influence law of seismic behavior of the large-span curvedcontinuous rigid frame bridge under different curvature radius[A].The Twenty-third National Conference on Structural Engineering[C].Beijing:Engineering Mechanics,2014.
[9]任权昌,杨新磊.桥墩结构形式对大跨连续刚构桥抗震性能影响分析[J].铁道建筑,2014(1):24-27.REN Quan-chang,YANG Xin-lei.The influence of pier types on the seismic performance of the longspan continuous rigid frame bridge[J].Railway Engineering,2014(1):24-27.
[10]ZHOU Yong-jun,ZHAO Yu.Effect of tie beam on the dynamic behavior and seismic response of curved rigid frame bridge with high piers and long span[J].Journal of Basic Science and Engineering,2011(8):608-618.
[11]李杰,陈淮,王艳.双薄壁高墩曲线连续刚构桥地震响应分析[J].世界地震工程,2012(4):157-160.LIE Jie,CHEN Huai,WANG Yan.Seismic response analysis of continuous rigid frame curved bridge with double thin-walled high pier[J].World Earthquake Engineering,2012(4):157-160.
[12]肖勇刚,钱进,钱长照.桥墩受车船撞击下的动力学问题分析[J].长沙理工大学学报:自然科学版,2013,10(4):54-59.XIAO Yong-gang,QIAN Jin,QIAN Chang-zhao.Dynamic analysis of impact problem between bridge pier and vehicle ship[J].Journal of Changsha University of Science and Technology:Natural Science,2013,10(4):54-59.
[2]陈兴冲,吴海燕,张永亮.行波效应对铁路大跨长联连续刚构桥地震反应的影响[J].世界地震工程,2010(1):191-196.CHEN Xing-chong,WU Hai-yan,ZHANG Yong-liang.The effect of traveling waves on seismic response of railway long-span and long-conjunction continuous rigidframe bridges under multi-support excitations[J].World Earthquake Engineering,2010(1):191-196.
[3]石雄伟,刘海鹏,周勇军,等.双薄壁墩间距对连续刚构桥地震响应的影响[J].交通运输工程学报,2010(3):35-40.SHI Xiong-wei,LIU Hai-peng,ZHOU Yong-jun,et al.Effect of double-thin-wall distance on seismic response of continuous rigid frame bridge[J].Journal of Traffic and Transportation Engineering,2010(3):35-40.
[4]谢肖礼,王波,张伟峰.罕遇地震作用下高墩连续刚构桥双重非线性抗震分析[J].工程力学,2009(4)113-118.XIE Xiao-li,WANG Bo,ZHANG Wei-feng.Double nonlinear aseismic analysis of high-rise pier and rigid frame bridges under rear earthquake[J].Engineering Mechanics,2009(4):113-118.
[5]陈彦,文华斌.地震作用下高墩大跨连续刚构桥几何非线性影响研究[J].铁道建筑,2013(7):15-19.CHEN Yan,WEN Hua-bin.Earthquake under the action of long-span continuous rigid frame bridge with high-rise piers geometric nonlinear impact study[J].Railway Engineering,2013(7):15-19.
[6]何钦象,田小红,宋丹.高墩大跨径连续刚构桥抗震性能评估[J].振动与冲击,2009(1):68-71.HE Qin-xiang,TIAN Xiao-hong,SONG dan.Seismic assessment of long-span continuous rigid frame bridge with high-rise piers[J].Journal of Vibration and Shock,2009(1):68-71.
[7]Long Pei-heng,JIANG Rong.Seismic response analysis of curved continuous rigid frame bridge under multi-support excitation[J].IET Conference Publications,2011(3):109-119.
[8]冯江晓,董军.曲率半径变化对特大跨径连续刚构桥抗震性能影响的规律研究[A].第23届全国结构工程学术会议文集[C].北京:工程力学杂志社,2014.FENG jiang-xiao,DONG jun.Study on the influence law of seismic behavior of the large-span curvedcontinuous rigid frame bridge under different curvature radius[A].The Twenty-third National Conference on Structural Engineering[C].Beijing:Engineering Mechanics,2014.
[9]任权昌,杨新磊.桥墩结构形式对大跨连续刚构桥抗震性能影响分析[J].铁道建筑,2014(1):24-27.REN Quan-chang,YANG Xin-lei.The influence of pier types on the seismic performance of the longspan continuous rigid frame bridge[J].Railway Engineering,2014(1):24-27.
[10]ZHOU Yong-jun,ZHAO Yu.Effect of tie beam on the dynamic behavior and seismic response of curved rigid frame bridge with high piers and long span[J].Journal of Basic Science and Engineering,2011(8):608-618.
[11]李杰,陈淮,王艳.双薄壁高墩曲线连续刚构桥地震响应分析[J].世界地震工程,2012(4):157-160.LIE Jie,CHEN Huai,WANG Yan.Seismic response analysis of continuous rigid frame curved bridge with double thin-walled high pier[J].World Earthquake Engineering,2012(4):157-160.
[12]肖勇刚,钱进,钱长照.桥墩受车船撞击下的动力学问题分析[J].长沙理工大学学报:自然科学版,2013,10(4):54-59.XIAO Yong-gang,QIAN Jin,QIAN Chang-zhao.Dynamic analysis of impact problem between bridge pier and vehicle ship[J].Journal of Changsha University of Science and Technology:Natural Science,2013,10(4):54-59.
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