自锚式悬索桥地震响应及减震控制分析
|
摘要
以长沙三汊矶湘江大桥为研究对象,对自锚式悬索桥的动力特性、地震响应及粘滞阻尼器的减震效果进行分析。基于结构非一致激励地震动方程,建立空间非线性有限元模型,探讨一致输入、行波输入下结构的地震响应。分别以主梁纵向位移、塔底内力为控制目标,研究粘滞阻尼器参数变化对结构减震效果的影响。计算结果表明:地震作用下塔底顺桥向弯矩达117.492MN.m,对自锚式悬索桥的设计起控制作用;行波效应使得主梁跨中横向位移增大90%,横向弯矩减小60%;结构纵向位移及塔底内力在考虑行波效应后减小10%左右,安装参数合理的阻尼器使主梁纵向位移减小83%,塔底纵向弯矩减小62%,达到良好的减震效果。
Taking the project of Sanchaji Bridge as object,the dynamic characteristics and seismic response of self-anchored suspension bridge was calculated. The seismic response after installing viscous dampers was analyzed. Based on the equation of multi-support excitation,a spatial nonlinear finite element model was established and the seismic response of the bridge under synchronous excitation and traveling seismic excitation were discussed. In order to reduce the longitudinal displacement of the girder and the inner force of the pylon bottom,parameters of the viscous damper was studied. The results show that transverse displacements in mid-span increase by 90% and the transverse moment reduces by 60% under traveling seismic excitation. The longitudinal displacement and inner force of the pylon bottom reduces about 10% considering the effect of the traveling seismic excitation. The longitudinal displacement of the girder reduces by 83% and longitudinal moment of the pylon bottom reduces by 62% through installing viscous damper with appropriate parameters. The seismic response can be controlled effectively.
Taking the project of Sanchaji Bridge as object,the dynamic characteristics and seismic response of self-anchored suspension bridge was calculated. The seismic response after installing viscous dampers was analyzed. Based on the equation of multi-support excitation,a spatial nonlinear finite element model was established and the seismic response of the bridge under synchronous excitation and traveling seismic excitation were discussed. In order to reduce the longitudinal displacement of the girder and the inner force of the pylon bottom,parameters of the viscous damper was studied. The results show that transverse displacements in mid-span increase by 90% and the transverse moment reduces by 60% under traveling seismic excitation. The longitudinal displacement and inner force of the pylon bottom reduces about 10% considering the effect of the traveling seismic excitation. The longitudinal displacement of the girder reduces by 83% and longitudinal moment of the pylon bottom reduces by 62% through installing viscous damper with appropriate parameters. The seismic response can be controlled effectively.
引文
[1]张元凯,肖汝诚,金成棣.自锚式悬索桥的设计[J].桥梁建设,2002,22(5):30-32.ZHANG Yuan-kai,XIAO Ru-cheng,JIN Cheng-di.Design ofself-anchored suspension bridge[J].Bridge Construction,2002,22(5):30-32.
[2]张哲.混凝土自锚式悬索桥[M].北京:人民交通出版社,2005.ZHANG Zhe.Self-anchored concrete suspension bridge[M].Beijing:China Communications Press,2005.
[3]John A O,David P B.Self-anchored suspension bridges[J].Journal of Bridge Engineering,1999,4(3):151-156.
[4]吴斌暄,王磊,王歧峰.使用非线性粘滞阻尼器的桥梁在地震反应中的响应分析[J].公路交通科技,2007,24(10):76-80.WU Bin-xuan,WANG Lei,WANG Qi-feng.A method of seismic response analysis for bridge with nonlinear viscous damper[J].Journal of Highway and Transportation Research and Development,2007,24(10):76-80.
[5]郝南海,王全聪.等径侧向挤压变形均匀程度的有限元分析[J].中国有色金属学报,2001,11(2):230-233.HAO Nan-hai,WANG Quan-cong.Finite element analysis of deformation uniformity of equal cross section lateral extrusion[J].The Chinese Journal of Nonferrous Metals,2001,11(2):230-233.
[6]陈仁福.大跨悬索桥理论[M].成都:西南交通大学出版社,1994.CHEN Ren-fu.Theory of long-span suspension bridge[M].Chengdu:South-West Jiaotong University Press,1994.
[7]刘忠平.三汊矶湘江大桥自锚式悬索桥地震反应研究[D].中南大学土木建筑学院,2007.LIU Zhong-ping.Study on seismic response of Sanchaji Xiangjiang Self-Anchored Bridge[D].School of Civil and Architectural Engineering,Central South University,2007.
[8]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.FAN Li-chu,HU Shi-de,YE Ai-jun.Aseismic design of large-span bridge[M].Beijing:China Communication Press,2001.
[9]陆铁坚,李芳,余志武.在地震动水平与摇摆分量作用下高层结构随机地震反应[J].中南大学学报:自然科学版,2006,37(3):623-627.LU Tie-jian,LI Fang,YU Zhi-wu.Random response of high-layer structures in combined action of horizontal and rocking ground motions[J].Journal of Central South University:Science and Technology,2006,37(3):623-627.
[10]丰硕,项贻强,谢旭.超大跨度悬索桥的动力特性及地震反应分析[J].公路交通科技,2005,22(8):31-35.FENG Shuo,XIANG Yi-qiang,XIE Xu.Dynamic characteristics and multi-support seismic response analysis of a super-large-span suspension bridge[J].Journal of Highway and Transportation Research and Development,2005,22(8):31-35.
[11]Abdel G A M,Rubin L I.Lateral earth-quake response of suspension bridges[J].Journal of Structural Engineering,1983,109(3):664-675.
[12]张卉,王志清,彭元诚,等.四渡河大跨悬索桥空间地震响应分析[J].地震工程与工程振动,2007,27(3):70-76.ZHANG Hui,WANG Zhi-qing,PENG Yuan-cheng,et al.Spatial seismic response analysis of long-span suspension bridge across Sidu River[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(3):70-76.
[13]Nicos M,Constantinous M C,Dargush G F.Analytical model of viscoelastic fluid dampers[J].Journal of Structural Engineering,1993,119(11):3310-3325.
[14]王志强,胡世德,范立础.东海大桥粘滞阻尼器参数研究[J].中国公路学报,2005,18(3):37-42.WANG Zhi-qiang,HU Shi-de,FAN Li-chu.Research on viscous damper parameters of Donghai Bridge[J].China Journal of Highway and Transport,2005,18(3):37-42.
[2]张哲.混凝土自锚式悬索桥[M].北京:人民交通出版社,2005.ZHANG Zhe.Self-anchored concrete suspension bridge[M].Beijing:China Communications Press,2005.
[3]John A O,David P B.Self-anchored suspension bridges[J].Journal of Bridge Engineering,1999,4(3):151-156.
[4]吴斌暄,王磊,王歧峰.使用非线性粘滞阻尼器的桥梁在地震反应中的响应分析[J].公路交通科技,2007,24(10):76-80.WU Bin-xuan,WANG Lei,WANG Qi-feng.A method of seismic response analysis for bridge with nonlinear viscous damper[J].Journal of Highway and Transportation Research and Development,2007,24(10):76-80.
[5]郝南海,王全聪.等径侧向挤压变形均匀程度的有限元分析[J].中国有色金属学报,2001,11(2):230-233.HAO Nan-hai,WANG Quan-cong.Finite element analysis of deformation uniformity of equal cross section lateral extrusion[J].The Chinese Journal of Nonferrous Metals,2001,11(2):230-233.
[6]陈仁福.大跨悬索桥理论[M].成都:西南交通大学出版社,1994.CHEN Ren-fu.Theory of long-span suspension bridge[M].Chengdu:South-West Jiaotong University Press,1994.
[7]刘忠平.三汊矶湘江大桥自锚式悬索桥地震反应研究[D].中南大学土木建筑学院,2007.LIU Zhong-ping.Study on seismic response of Sanchaji Xiangjiang Self-Anchored Bridge[D].School of Civil and Architectural Engineering,Central South University,2007.
[8]范立础,胡世德,叶爱君.大跨度桥梁抗震设计[M].北京:人民交通出版社,2001.FAN Li-chu,HU Shi-de,YE Ai-jun.Aseismic design of large-span bridge[M].Beijing:China Communication Press,2001.
[9]陆铁坚,李芳,余志武.在地震动水平与摇摆分量作用下高层结构随机地震反应[J].中南大学学报:自然科学版,2006,37(3):623-627.LU Tie-jian,LI Fang,YU Zhi-wu.Random response of high-layer structures in combined action of horizontal and rocking ground motions[J].Journal of Central South University:Science and Technology,2006,37(3):623-627.
[10]丰硕,项贻强,谢旭.超大跨度悬索桥的动力特性及地震反应分析[J].公路交通科技,2005,22(8):31-35.FENG Shuo,XIANG Yi-qiang,XIE Xu.Dynamic characteristics and multi-support seismic response analysis of a super-large-span suspension bridge[J].Journal of Highway and Transportation Research and Development,2005,22(8):31-35.
[11]Abdel G A M,Rubin L I.Lateral earth-quake response of suspension bridges[J].Journal of Structural Engineering,1983,109(3):664-675.
[12]张卉,王志清,彭元诚,等.四渡河大跨悬索桥空间地震响应分析[J].地震工程与工程振动,2007,27(3):70-76.ZHANG Hui,WANG Zhi-qing,PENG Yuan-cheng,et al.Spatial seismic response analysis of long-span suspension bridge across Sidu River[J].Journal of Earthquake Engineering and Engineering Vibration,2007,27(3):70-76.
[13]Nicos M,Constantinous M C,Dargush G F.Analytical model of viscoelastic fluid dampers[J].Journal of Structural Engineering,1993,119(11):3310-3325.
[14]王志强,胡世德,范立础.东海大桥粘滞阻尼器参数研究[J].中国公路学报,2005,18(3):37-42.WANG Zhi-qiang,HU Shi-de,FAN Li-chu.Research on viscous damper parameters of Donghai Bridge[J].China Journal of Highway and Transport,2005,18(3):37-42.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心