大跨度公铁两用斜拉桥列车制动力作用下结构响应研究
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摘要
以某一正在设计的大跨度公铁两用斜拉桥为背景,利用非线性动力时程分析方法,分析了塔梁间设置黏滞阻尼器时,在列车制动力作用下结构动力响应,并与未设置黏滞阻尼器情况下的结构响应进行比较。分析结果表明,在塔梁间设置黏滞阻尼器能有效地降低在列车制动力作用下梁端及塔梁相对位移,结构受力也有所改善。
Based on a highway and railway cable-stayed bridge under design,dynamic responses of the structure were analyzed under train braking forces by the nonlinear dynamic time-history analysis method. Viscous dampers were installed between the tower and girders for this bridge. Results were compared for models with viscous dampers and without viscous dampers. It is indicated that the displacements on the beam end and relative displacements between tower and beam were reduced effectively by installing dampers between tower and beam.
Based on a highway and railway cable-stayed bridge under design,dynamic responses of the structure were analyzed under train braking forces by the nonlinear dynamic time-history analysis method. Viscous dampers were installed between the tower and girders for this bridge. Results were compared for models with viscous dampers and without viscous dampers. It is indicated that the displacements on the beam end and relative displacements between tower and beam were reduced effectively by installing dampers between tower and beam.
引文
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[3]梁智垚,李建中.大跨度公铁两用斜拉桥阻尼器参数研究[J].同济大学学报(自然科学版),2007,35(6):728-733.Liang Zhiyao,Li Jianzhong.Research on damper parameters of long-span rail-cum-road cable-stayed bridge[J].Journal of Tongji University(Natural Science Edition),2007,35(6):728-733.(in Chinese)
[4]秦顺全.武汉天兴洲公铁两用长江大桥关键技术研究[J].工程力学,2008,25(12):99-105.Qin Shunquan.Key technology of Tianxingzhou Yangtze River Brigde[J].Engineering Mechanics,2008,25(12):99-105.(in Chinese)
[5]王志强,胡世德,范立础.东海大桥黏滞阻尼器参数研究[J].中国公路学报,2005,18(3):37-421.Wang Zhiqiang,Hu Shide,Fan Lichu.Research on viscous damper parameters of Donghai Bridge[J].China Journal of Highway and Transport,2005,18(3):37-421.(in Chinese)
[6]韩万水,黄平明,兰燕.斜拉桥纵向设置黏滞阻尼器参数分析[J].地震工程与工程振动,2005,25(6):146-151.Han Wanshui,Huang Pingming,Lan Yan.Parametric analysis of cable-stayed bridge with longitudinal viscous dampers[J].Earhquake Engineering and Engineering Vibration,2005,25(6):146-151.(in Chinese)
[7]Wilson E L.Three dimensional static and dynamic analysis of structures:A physical approach with emphasis on earthquake engineering[M].California:Computers and Structures Inc.,2002.
[8]王锐锋,李宏年.铁路桥梁列车制动力荷载研究[J].北方交通大学学报,2003,27(1):63.Wang Ruifeng,Li Hongnian.Study of train braking force on railroad bridge[J].Journal of Northern Jiaotong University,2003,27(1):63.(in Chinese)
[9]雷俊卿,李宏年,冯东.铁路桥梁列车制动力的试验研究与计算分析[J].工程力学,2006,23(3):134-140.Lei Junqing,Li Hongnian,Feng Dong.Expericemengt study and computational analysis on baking force between running train and railway bridge[J].Engineering Mechanics,2006,23(3):134-140.(in Chinese)
[10]瞿伟廉,刘嘉,涂建维,等.天兴洲公铁两用斜拉桥主梁纵向列车制动振动反应分析[J].地震工程与工程振动,2008,28(1):130-138.Qu Weilian,Liu Jia,Tu Jianwei,et al.Longitudinal response analysis of Tianxingzhou highway and railway combined cable-stayed bridge subjected to train braking and traffic[J].Earhquake Engineering and Engineering Vibration,2008,28(1):130-138.(in Chinese)
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