基于粘滞阻尼器的大跨铁路斜拉桥横向减震研究
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摘要
以某铁路大跨斜拉桥为实际工程背景,研究了斜拉桥在过渡墩及辅助墩处横桥向合理的约束体系.通过大量的线性及非线性时程反应分析,研究了不同的约束体系下斜拉桥的地震反应特点.针对基于粘滞液体阻尼器的减震体系方案,对阻尼器的设置位置及力学参数进行了优化设计.研究结果表明:在过渡墩及辅助墩横向设置粘滞阻尼器的减震体系方案由于其它方案,该方案不仅可降低主塔横桥向的地震反应,还可显著降低过渡墩及辅助墩的桥墩,进而提高边墩桩基础的抗震性能.
Research on tranverse reasonable constraint system for auxiliary pier and transition pier on railway long-span cable-stayed bridge is presented.By conducting a large number of linear and non-linear time-history response analysis,the characteristics of seismic response for the cable-stayed bridge are studied.Optimal design for layout and mechanical parameters of viscous dampers are performed in case of earthquake-reduction system based on viscous dampers.The results show that the earthquake-reduction system is better than other systems by setting up viscous dampers between auxiliary pier,transition pier and girder,for tranverse seismic response of main tower,auxiliary pier and transition pier can be significantly reduced.Furthermore,seismic performance of pile foundations for auxiliary pier and transition pier can be improved.
Research on tranverse reasonable constraint system for auxiliary pier and transition pier on railway long-span cable-stayed bridge is presented.By conducting a large number of linear and non-linear time-history response analysis,the characteristics of seismic response for the cable-stayed bridge are studied.Optimal design for layout and mechanical parameters of viscous dampers are performed in case of earthquake-reduction system based on viscous dampers.The results show that the earthquake-reduction system is better than other systems by setting up viscous dampers between auxiliary pier,transition pier and girder,for tranverse seismic response of main tower,auxiliary pier and transition pier can be significantly reduced.Furthermore,seismic performance of pile foundations for auxiliary pier and transition pier can be improved.
引文
[1]陈锐林,曾庆元,黄云清,等.大跨铁路斜拉桥模态特性研究[J].振动与冲击,2010,29(2):7-11.
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[3]刘伟庆,徐秀丽,吴晓兰,等.大跨度斜拉桥结构横向消能减震设计方法[J].振动工程学报,2006,19(3):426-432.
[4]徐利平.超大跨径斜拉桥的结构体系分析[J].同济大学学报:自然科学版,2003,31(4):400-403.
[5]杨喜文,张文华,李建中.大跨度斜拉桥横桥向减震研究[J].地震工程与工程振动,2012,32(1):86-92.
[6]叶爱君,范立础.附加阻尼器对大跨度斜拉桥的减震效果[J].同济大学学报:自然科学版,2006,34(7):859-863.
[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.
[8]梁智垚,李建中.大跨度公铁两用斜拉桥阻尼参数研究[J].同济大学学报:自然科学版,2007,35(6):728-733.
[9]张永亮,陈兴冲,郭永强.刚构连续梁体系铁路矮塔斜拉桥的减震研究[J].铁道学报,2011,33(10):79-85.
[2]范立础.桥梁抗震[M].上海:同济大学出版社,1997.
[3]刘伟庆,徐秀丽,吴晓兰,等.大跨度斜拉桥结构横向消能减震设计方法[J].振动工程学报,2006,19(3):426-432.
[4]徐利平.超大跨径斜拉桥的结构体系分析[J].同济大学学报:自然科学版,2003,31(4):400-403.
[5]杨喜文,张文华,李建中.大跨度斜拉桥横桥向减震研究[J].地震工程与工程振动,2012,32(1):86-92.
[6]叶爱君,范立础.附加阻尼器对大跨度斜拉桥的减震效果[J].同济大学学报:自然科学版,2006,34(7):859-863.
[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.
[8]梁智垚,李建中.大跨度公铁两用斜拉桥阻尼参数研究[J].同济大学学报:自然科学版,2007,35(6):728-733.
[9]张永亮,陈兴冲,郭永强.刚构连续梁体系铁路矮塔斜拉桥的减震研究[J].铁道学报,2011,33(10):79-85.
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