Analysis of vehicle-bridge coupling vibration considering the influence of expansion joint

被引：0
|
作者：
Hou J. [1 ]
Xu W. [1 ]
Wang J. [1 ]
Chen Y. [1 ]
Zhang K. [1 ]
Li Y. [2 ]
机构：
[1] College of Architecture Engineering, Beijing University of Technology, Beijing
[2] School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 22期
关键词：
Bridge engineering; Modular expansion joint; Numerical simulation; Test verification; Vehicle-joint-bridge model;
D O I：
10.13465/j.cnki.jvs.2021.22.021
中图分类号：
学科分类号：
摘要：
The deterioration of expansion joints has a significant effect on the vehicle-bridge coupling vibration response. To establish an analysis method for the vehicle-bridge coupling vibration considering the influence of expansion joint, a single point contact time-varying force model was proposed based on the analysis of the vehicle-bridge coupling dynamic responses and the mechanical characteristics of a wheel over joint. Then, an analysis model for the vehicle-joint-bridge coupling vibration was established based on the local vibration mode extraction and mode synthesis method and its numerical solution method. Its effectivity was verified by the field-testing data. Then, taking a three span continuous beam bridge as an example, the influences of the factors such as the vehicle passing through the joint, the height difference of the expansion joint, the gap, the vehicle speed, the vehicle layout and the vehicle weight on the dynamic responses of the vehicle-joint-bridge coupling vibration was studied. The result indicates that the expansion joint at the outside of the end support will reduce the displacement response of the main beam in the middle of the span, but will increase the vehicle impact effect at the ends of the bridge. Under the same bridge length, the vehicle passing through the joint will increase the displacement and acceleration responses of the bridge, and the acceleration response will increase more obviously. The height difference of the expansion joint will reduce the vertical displacement response of the first span, but the vertical displacement responses of the other two spans will increase. The height difference of the expansion joint has a significant effect on the vehicle impact in different regions. The vehicle impact effect near the expansion joint increases with the increase of the expansion joint gap. When the vehicle speed is low, the fluctuation of the vertical peak displacement and impact coefficient of the main beam is slight, and the peak value appears near the vehicle speed of 80 km/h. The dynamic displacement of each span of the main beam increases with the increase of the number of vehicles, but the displacement impact coefficient of each span does not necessarily increase. The bridge impact coefficient decreases with the increase of vehicle weight. In the design of bridges, the influence of the change of expansion joint parameters on the impact induced by vehicles in different regions of the bridge should be considered. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：151 / 160
页数：9
相关论文
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