Influence of friction effect of sliding bearing on track-bridge interaction between continuous welded rail and long-span bridge in high-speed railway

被引：4
作者：
Liu W. [1 ,2 ]
Dai G. [1 ,2 ]
Qin H. [3 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
[2] National Engineering Laboratory for High-speed Railway Construction, Central South University, Changsha
[3] School of Civil Engineering, Central South University of Forestry and Technology, Changsha
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2019年 / 50卷 / 03期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Bearing friction; Continuous welded rail; Long-span bridge; Longitudinal additional force; Track-bridge interaction;
D O I：
10.11817/j.issn.1672-7207.2019.03.016
中图分类号：
学科分类号：
摘要：
To investigate the influence of friction effect of sliding bearing on the interaction between the continuous welded rail (CWR) and the long-span bridge, taking a long-span steel-truss arch bridge in high-speed railway as research object, an integrative spatial model of track-bridge-pier-foundation system was established. Adopting the nonlinear spring element simulating the sliding bearings, the various longitudinal additional forces between long-span bridge and CWR considering the friction effect or not were compared. The results indicate that the friction effect should be considered in the analysis of the long-span railway bridge-track system, which has an apparent influence on the additional expansion forces and rail-broken forces. Considering the friction effect, with the increase of the friction coefficient, the various additional forces of rail and the rail-broken gap decrease, while the additional forces of piers increase evidently. In the case of using common fasteners, compared with no friction(μ=0), the maximum additional expansion stress of rail reduces to 92.7%, 87.3% and 71.8% corresponding to the friction coefficient of 0.03, 0.05 and 0.10, while the force of the fixed pier increases to 2.1, 2.8 and 4.4 times. In addition, adopting small resistance fasteners, the additional forces of rail and piers have a little difference from the results of common fasteners, while the rail-broken gap generally increases by about 20%. © 2019, Central South University Press. All right reserved.
引用
收藏
页码：627 / 633
页数：6
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