大跨度斜拉桥阻尼器参数分析
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摘要
以某大跨度斜拉桥实际工程为依托,研究大跨度斜拉桥线性粘滞阻尼器参数的不同选取对该桥抗震性能的影响。通过线性动力时程分析对线性粘滞阻尼器在大跨度斜拉桥中阻尼系数C进行参数敏感性分析,并与该桥在未设置线性粘滞阻尼器状态下的地震响应进行比较分析。结果表明:斜拉桥纵向设置粘滞阻尼器后,通过调节粘滞阻尼器的参数能有效降低结构在地震作用下关键部位的相对位移;可以有效的控制大跨度斜拉桥纵向位移,但是在高频区,竖向位移放大约为23%;同时也改善了结构构件的地震力响应并为同类工程粘滞阻尼器应用中的参数研究提供参考。
The seismic behavior analysis of a long-span cable-stayed bridge will be conducted on a parameter of damping coefficient C of the linear viscous dampers through linear dynamic time-history analysis. Simultaneously,the results are compared with the seismic response without viscous dampers. The parameter sensitivity study indicates that setting dampers in longitudinal direction of bridge can reduce the relative displacement of key positions and the response of the bridge,the beneficial effect of the isolation in the longitudinal direction,but important amplification occurs in the vertical direction for relatively high frequency components. Moreover,the reference of application of linear viscous dampers will be provided for similar projects.
The seismic behavior analysis of a long-span cable-stayed bridge will be conducted on a parameter of damping coefficient C of the linear viscous dampers through linear dynamic time-history analysis. Simultaneously,the results are compared with the seismic response without viscous dampers. The parameter sensitivity study indicates that setting dampers in longitudinal direction of bridge can reduce the relative displacement of key positions and the response of the bridge,the beneficial effect of the isolation in the longitudinal direction,but important amplification occurs in the vertical direction for relatively high frequency components. Moreover,the reference of application of linear viscous dampers will be provided for similar projects.
引文
[1]Dynamic characteristics of a long span seismic isolated bridge[J].Engineering Structures.Chile,25(2003)1479-1490
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[6]王志强,胡世德,周红卫,等.卢浦大桥减、隔震装置的研究[A].上海:同济大学出版社,2002.372-379(Wang Zhiqiang,Hu Shide,Zhou Hongwei.Research of isolation in Lupu bridge[A].Shanghai:Tongji University Press,2002.372—379(in Chinese))
[7]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 Zhiqiang,Hu Shide,Fan Lichu.Research of viscous damper parameters in Donghai bridge[J].China journal of highway and transport.2005,18(3):37-42(in Chinese))
[8]卢桂臣,胡雷挺.西堠门大桥液体粘滞阻尼器参数分析.世界桥梁[J].2005。(Lu Gucheng,Hu Leiting.Parameters analysis of liquid viscous damper in Xi Houmen bridge[J].World Bridge.2005.(in Chinese)).
[2]Hong-Yu Jia,De-Yi Zhang,Shixiong Zheng,Wei-Chau Xie,Mahesh D.Pandey.Local site effects on a high-pier railway bridge under tridirectional spatial excitations:nonstationary stochastic analysis[J],Soil Dynamics and Earthquake Engineering,2013,52:55-69
[3]范立础.桥梁抗震[M].上海:同济大学出版社,1997.(Fan Lichu.Bridge seimic[M].Shanghai Tongji University Press.1997(in Chinese)).
[4]Priestley M J N,Sfeible F,Calvi G M.Seismic Design and Retrofit of Bridges[M].New York:John Wiley and Sons,1996
[5]于泳波,万振江,刘健新.减震技术在公路桥梁中的应用及地震反应分析[J].长安大学学报,2004,24(2):58-60(Yu Yongbo,Wan Zhenjiang,Liu Jianxin.Seismic reduction design for highway bridge and seismic response[J].Journal of Chang’an University,2004,24(2):58-60(in Chinese))
[6]王志强,胡世德,周红卫,等.卢浦大桥减、隔震装置的研究[A].上海:同济大学出版社,2002.372-379(Wang Zhiqiang,Hu Shide,Zhou Hongwei.Research of isolation in Lupu bridge[A].Shanghai:Tongji University Press,2002.372—379(in Chinese))
[7]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 Zhiqiang,Hu Shide,Fan Lichu.Research of viscous damper parameters in Donghai bridge[J].China journal of highway and transport.2005,18(3):37-42(in Chinese))
[8]卢桂臣,胡雷挺.西堠门大桥液体粘滞阻尼器参数分析.世界桥梁[J].2005。(Lu Gucheng,Hu Leiting.Parameters analysis of liquid viscous damper in Xi Houmen bridge[J].World Bridge.2005.(in Chinese)).
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