地震作用下结构拟静力分量对车桥系统动力响应的影响分析

Abstract
Figure/Table
References (12)
Related Citation (15)

Download: PDF (1757 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract

In regions prone to earthquakes, the possibility of trains running on bridges when an earthquake occurs is getting larger. However, the influence of structure quasi-static components on seismic response of train-bridge system has not been studied sufficiently. In this paper, the bridge subsystem and the train subsystem are simplified to simply supported beam with uniform cross-section and a moving vehicle with a wheel ( unsprung-mass), a spring, a damper and a sprung-mass, respectively. Then the motion equations of train-bridge coupling system subjected to multi-support seismic excitations can be obtained. The influence of structure quasi-static components can be expressed precisely by decomposing the dynamic response of the bridge subsystem and then the solving procedure is proposed. A moving vehicle with a wheel ( unsprung-mass), a spring, a damper and a sprung-mass passing through a 32m simply supported beam is taken as a case study, in which the influence rule of structure quasi-static components is analyzed. The results show: 1) in the dynamic analysis of train-bridge system subjected to earthquake actions considering the influence of quasi-static components, it is necessary to input the displacement, velocity as well as acceleration time history of ground motion; 2) compared with the bridge subsystem, quasi-static components have more influence on the train subsystem, which is beyond 16% and sensitive to the train speed; 3) neglecting the quasi-static components may lead to large deviation responses of the coupled system, which differs greatly from the aseismatic analysis of bridges.

Key words： coupled train-bridge system, seismic ground motion, structure quasi-static components, Bernoulli- Euler beam, sprung-mass system.

Received: 28 May 2015 Published: 15 August 2016

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	DU Xian-ting1
	QIAO Hong1
	XIA He1
	Wang Shao-qin2
	LI Xiao1

Cite this article:

DU Xian-ting1,QIAO Hong1,XIA He1, et al. Influence of Structure Quasi-static Components on Dynamic Response of Train-Bridge System during Earthquakes[J]. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(16): 6-11.

URL:

http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2016/V35/I16/6

[1] Xia He, Han Yan, Zhang Nan, Guo Weiwei. Dynamic analysis of train-bridge system subjected to non-uniform seismic excitations [J]. Earthquake Engineering and Structural Dynamics, 2006, 35: 1563-1579.
[2] Du Xianting, Xu YL, Xia He. Dynamic interaction of bridge-train system under non-uniform seismic ground motion [J]. Earthquake Engineering and Structural Dynamics, 2012: 41(1): 139-157.
[3] 谭长建, 祝兵. 地震作用下高速列车与桥梁耦合振动分析[J]. 振动与冲击, 2009, 28(1): 4-8.
Tan Changjian, Zhu Bing. Coupled vibration analysis of high speed train and bridge subjected to seismic excitation [J]. Journal of vibration and shock, 2009, 28(1): 4-8. (in Chinese)
[4] 杜宪亭, 夏禾, 余竹. 车桥耦合动力分析中地震动输入模式的研究[J]. 中国铁道科学, 2011, 32(6):34-40.
Du Xianting, Xia He, Yu Zhu. Study on the input patterns of seismic ground motion in the dynamic interaction analysis of train-bridge system [J]. China Railway Science, 2011, 32(6):34-40.(in Chinese)
[5] Chopra A. Dynamics of Structure [M]. New Jersey: Prentice-Hall, Inc., 1995.
[6] 熊建珍, 高芒芒, 俞翰斌. 天兴洲长江大桥斜拉桥在地震作用下的车-桥耦合振动分析 [J]. 中国铁道科学, 2006, 27(5): 54-59.
Xiong Jianzhen, Gao Mangmang, Yu Hanbin. Vehicle-bridge coupling vibration analysis of cable-stayed bridge of Tianxingzhou Yangtze River Bridge under earthquakes [J]. China Railway Science, 2006, 27(5): 54-59. (in Chinese)
[7] 韩艳, 夏禾, 郭薇薇. 斜拉桥在地震与列车荷载同时作用下的动力响应分析 [J]. 工程力学, 2006, 23(1): 93-98.
Han Yan, Xia He, Guo Weiwei. Dynamic response of cable-stayed bridge to running trains and erathquakes [J]. Engineering Mechanics, 2006, 23(1): 93-98. (in Chinese)
[8] 王少林, 翟婉明. 地震作用下高速列车-线路-桥梁系统动力响应[J]. 西南交通大学学报, 2011(1): 56-62.
Wang Shaolin, Zhai Wanming. Dynamic response of high-speed train-track-bridge system under seismic excitations [J]. Journal of Southwest Jiaotong University, 2011(1): 56-62. (in Chinese)
[9] 夏禾, 张楠. 车辆与结构动力相互作用(第二版) [M]. 北京: 科学出版社, 2005.
[10] Chen JT, Hong HK, Yeh CS, et al. Integral representations and regulations for a divergent series solution of a beam subjected to support motions [J]. Earthquake Engineering and Structural Dynamics, 1996, 25: 909-925.
[11] 谢礼立,于双久.强震观测与分析原理[M].北京:地震出版社,1982.
[12] 杜宪亭, 夏禾. 地震空间变异性对车桥系统响应的影响分析[J]. 工程力学, 2012, 29(9): 106-111.
Du Xianting, Xia He. Influence of spatial vibration of seismic ground motion on dynamic response of train-bridge system [J]. Engineering Mechanics, 2012, 29(9): 106-111.(in Chinese)