自锚式悬索桥的粘滞阻尼器减震控制
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摘要
以长沙三汊矶湘江大桥为工程背景,基于桥梁地震动方程建立空间非线性有限元模型,研究粘滞阻尼器参数、安装位置对自锚式悬索桥减震效果的影响.计算结果表明:地震作用下主梁和塔顶纵向位移及塔底纵向弯矩均较大,对自锚式悬索桥的设计起控制作用;选择合理的阻尼器参数能够对结构的位移及内力进行有效控制;阻尼器的安装位置对减震效果影响很大,设计过程中应充分考虑不同控制截面内力及位移的变化情况来对阻尼器进行合理设置.
By taking the Sanchaji Xiangjiang bridge as the research object,a spatial nonlinear finite element model is established based on the seismic dynamic equation of bridge.The proposed model is then used to analyze the effects of the parameters and location of viscous damper on the mitigation to seismic response of self-anchored suspension bridge.The results indicate that the longitudinal displacements of the girder and the pylon top as well as the longitudinal moment of the pylon bottom are quite great under the action of earthquake,that appropriate damper parameters help to effectively reduce the displacement and internal force of the bridge,that the installation position of the damper greatly affects the seismic response,and that the variations of internal force and displacement in different control sections should be fully considered in the installation of viscous dampers.
By taking the Sanchaji Xiangjiang bridge as the research object,a spatial nonlinear finite element model is established based on the seismic dynamic equation of bridge.The proposed model is then used to analyze the effects of the parameters and location of viscous damper on the mitigation to seismic response of self-anchored suspension bridge.The results indicate that the longitudinal displacements of the girder and the pylon top as well as the longitudinal moment of the pylon bottom are quite great under the action of earthquake,that appropriate damper parameters help to effectively reduce the displacement and internal force of the bridge,that the installation position of the damper greatly affects the seismic response,and that the variations of internal force and displacement in different control sections should be fully considered in the installation of viscous dampers.
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 Construc-tion.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.
[3]John A O,David P B.Self-anchored suspension bridges[J].Journal of Bridge Engineering,1999,4(3):151-156.
[4]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 vis-cous damper parameters of Donghai Bridge[J].ChinaJournal of Highway and Transport,2005,18(3):37-42.
[5]Makris N,Constantinous M C,Dargush G F.Analyticalmodel of viscoelastic fluid dampers[J].Journal of Struc-tural Engineering,1993,119(11):3310-3325.
[6]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 seis-mic response analysis for bridge with nonlinear viscousdamper[J].Journal of Highway and Transportation Re-search and Development,2007,24(10):76-80.
[7]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.Spa-tia seismic response analysis of long-span suspensionbridge across Sidu River[J].Journal of Earthquake Engi-neering and Engineering Vibration,2007,27(3):70-76.
[8]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1992.
[9]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.
[10]杨孟刚,胡建华,陈政清.独塔自锚式悬索桥地震响应分析[J].中南大学学报:自然科学版,2005,36(1):133-137.Yang Meng-gang,Hu Jian-hua,Chen Zheng-qing.Seis-mic response analysis of self-anchored suspension bridgewith single tower[J].Journal of Central South Universi-ty:Science and Technology,2005,36(1):133-137.
[11]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 characte-ristics and multi-support seismic response analysis of asuper-large-span suspension bridge[J].Journal ofHighway and Transportation Research and Development,2005,22(8):31-35.
[12]刘忠平.三汊矶湘江大桥自锚式悬索桥地震反应研究[D].长沙:中南大学土木建筑学院,2007.
[13]陈仁福.大跨悬索桥理论[M].成都:西南交通大学出版社,1994.
[14]Abdel-Ghaffar A M,Rubin L I.Lateral earth-quake re-sponse of suspension bridges[J].Journal of StructuralEngineering,1983,109(3):664-675.
[2]张哲.混凝土自锚式悬索桥[M].北京:人民交通出版社,2005.
[3]John A O,David P B.Self-anchored suspension bridges[J].Journal of Bridge Engineering,1999,4(3):151-156.
[4]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 vis-cous damper parameters of Donghai Bridge[J].ChinaJournal of Highway and Transport,2005,18(3):37-42.
[5]Makris N,Constantinous M C,Dargush G F.Analyticalmodel of viscoelastic fluid dampers[J].Journal of Struc-tural Engineering,1993,119(11):3310-3325.
[6]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 seis-mic response analysis for bridge with nonlinear viscousdamper[J].Journal of Highway and Transportation Re-search and Development,2007,24(10):76-80.
[7]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.Spa-tia seismic response analysis of long-span suspensionbridge across Sidu River[J].Journal of Earthquake Engi-neering and Engineering Vibration,2007,27(3):70-76.
[8]李国豪.桥梁结构稳定与振动[M].北京:中国铁道出版社,1992.
[9]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.
[10]杨孟刚,胡建华,陈政清.独塔自锚式悬索桥地震响应分析[J].中南大学学报:自然科学版,2005,36(1):133-137.Yang Meng-gang,Hu Jian-hua,Chen Zheng-qing.Seis-mic response analysis of self-anchored suspension bridgewith single tower[J].Journal of Central South Universi-ty:Science and Technology,2005,36(1):133-137.
[11]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 characte-ristics and multi-support seismic response analysis of asuper-large-span suspension bridge[J].Journal ofHighway and Transportation Research and Development,2005,22(8):31-35.
[12]刘忠平.三汊矶湘江大桥自锚式悬索桥地震反应研究[D].长沙:中南大学土木建筑学院,2007.
[13]陈仁福.大跨悬索桥理论[M].成都:西南交通大学出版社,1994.
[14]Abdel-Ghaffar A M,Rubin L I.Lateral earth-quake re-sponse of suspension bridges[J].Journal of StructuralEngineering,1983,109(3):664-675.
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