中小跨度悬索桥非线性液体黏滞阻尼器反应谱迭代方法
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摘要
通过中小跨度悬索桥的模态分析、地震激励分析以及相应的频谱分析,证明了纵飘振型为中小跨度悬索桥梁端纵向位移的单一控制振型.中小跨度悬索桥梁端纵向位移具有单自由度体系特征,故可根据纵飘振型建立中小跨度悬索桥梁端纵向位移单自由度模型,应用非线性液体黏滞阻尼器单自由度反应谱迭代方法,实现非线性液体黏滞阻尼器参数的选取和中小跨度悬索桥梁端纵向最大位移的估算.
Based on the modal analysis,seismic excitation analysis and frequency spectrum analysis of medium and small-span suspension bridges,the longitudinal floating vibration mode was confirmed to be the single controlling vibration mode of longitudinal displacement at the girder end.The longitudinal displacement at the girder end of medium and small-span suspension bridges exhibited the characteristics of single degree of freedom system.Therefore,the model with single degree of freedom could be established according to the longitudinal floating vibration mode.The selection of parameters for the non-linear fluid viscous dampers and the estimation of the maximum longitudinal displacement at the girder end of medium and small-span suspension bridges could be realized by use of the iterative response spectrum method of non-linear fluid viscous dampers with single degree of freedom.
Based on the modal analysis,seismic excitation analysis and frequency spectrum analysis of medium and small-span suspension bridges,the longitudinal floating vibration mode was confirmed to be the single controlling vibration mode of longitudinal displacement at the girder end.The longitudinal displacement at the girder end of medium and small-span suspension bridges exhibited the characteristics of single degree of freedom system.Therefore,the model with single degree of freedom could be established according to the longitudinal floating vibration mode.The selection of parameters for the non-linear fluid viscous dampers and the estimation of the maximum longitudinal displacement at the girder end of medium and small-span suspension bridges could be realized by use of the iterative response spectrum method of non-linear fluid viscous dampers with single degree of freedom.
引文
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[2]LEE D,TAYLOR D P.Viscous damper development and future trends[J].Structural Design of Tall Buildings,2001,10(5):311-320.
[3]陈永祁,耿瑞琦,马良吉吉.桥梁用液体黏滞阻尼器的减振设计和类型选择[J].土木工程学报,2007,40(7):55-61.(CHENYong-qi,GENG Rui-qi,MA Liang-zhe.Design and selection of fluid viscous devices for shock control of bridges[J].China CivilEngineering Journal,2007,40(7):55-61.(in Chinese))
[4]聂利英,李建中,胡世德,等.任意荷载作用下液体黏滞阻尼器在桥梁工程中减震作用探讨[J].计算力学学报,2007,24(2):197-202.(NIE Li-ying,LI Jian-zhong,HU Shi-de,et al.Investigation of decreasing vibration effects of fluid viscous damper in bridgeengineering under random loads[J].Chinese Journal of Computational Mechanics,2007,24(2):197-202.(in Chinese))
[5]王志强,胡世德,周红卫.卢浦大桥减、隔震装置的研究[C]//第十五届全国桥梁学术会议论文集.上海:同济大学出版社,2002:372-379.
[6]叶爱君,胡世德,范立础.超大跨度斜拉桥的地震位移控制[J].土木工程学报,2004,37(12):38-43.(YE Ai-jun,HU Shi-de,FAN Li-chu.Seismic displacement control for super-long-span cable-stayed bridges[J].China Civil Engineering Journal,2004,37(12):38-43.(in Chinese))
[7]聂利英,胡世德.舟山大陆连岛工程西堠门大桥主桥抗震性能研究报告[R].南京:南京水利科学研究院,2004.
[8]INGHAM T J,RODRIGUEZ S,NADER M.Nonlinear analysis of the Vincent Thomas Bridge for seismic retrofit[J].Computer&Structure,1997,64(5):1221-1238.
[9]雷俊卿,郑明珠,徐恭义.悬索桥设计[M].北京:人民交通出版社,2002.
[10]LIN Wen-hsiung,CHOPRA A K.Earthquake response of elastic SDF systems with non-linear fluid viscous dampers earthquake[J].EngngStruct Dyn,2002,31:1623-1642.
[11]CHOPRA A K.Dynamics of structure.Theory and applications to earthquake engineering[M].Prentice-Hall:Upper Saddle River,2001.
[12]JTG/TB02-01—2008公路桥梁抗震设计细则[S].
[13]范立础.桥梁抗震[M].上海:同济大学出版社,1997.
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