文献类型：期刊文献

英文题名：Effect of train load and water coupling to crack extension of CRTSII track

作者：Xu, Gui-Hong Liu, Xue-Yi Yang, Rong-Shan Zhou, Ke

第一作者：徐桂弘

通信作者：Xu, Gui-Hong

机构：[1] Guizhou Institute of Technology, Guiyang , 550003, China; [2] MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu , 610031, China

第一机构：贵州理工学院

年份：2014

卷号：36

期号：10

起止页码：76-80

外文期刊名：Tiedao Xuebao/Journal of the China Railway Society

收录：EI(收录号：20144600200003);Scopus(收录号：2-s2.0-84910095122)

语种：英文

外文关键词：Crack propagation - Fluid structure interaction - Railroad tracks - Stress intensity factors

摘要：Ballastless tracks have been widely used in construction of high-speed railways in China. The damage issue of ballastless tracks mainly in the form of carcks is becoming gradually evident, especially prominent is the influence of rainwater to the damages. In this paper, applying the unified governing equation and mathematical model established in the solid and fluid domains, on the principle of the two-way coupled field computation, extension of water-bearing cracks below bedding mortar of the CRTS type track slabs under the loading action of high-specd trains were simulated. By numerical analysis, the upper and lower surface pressures of cracks and the stress-intensity factor of crack tips were calculated. The results show as follows: The crack height and length are the important factors to affect surface pressures of cracks and so to cause further crack extension; the crack height and length directly affect surface pressures of cracks which rise basically linearly with increasing of the stress-intensity factor of crack tips; the crack length of 0.6 m and crack height of 3 mm are the ultimate state of crack extension; when the crack length exceeds 0.6 m or the crack height exceeds 3 mm, the tendency of crack extension becomes more distinct.