Influence of the Randomness of Longitudinal Resistance of Ballast Bed on Track-Bridge Interaction
Influence of the Randomness of Longitudinal Resistance of Ballast Bed on Track-Bridge Interaction作者机构：School of Safety Engineering and Emergency Management Shijiazhuang Tiedao University Shijiazhuang China School of Civil Engineering Shijiazhuang Tiedao University Shijiazhuang China
出 版 物：《Engineering（科研）》 (工程（英文）（1947-3931）)
年 卷 期：2023年第15卷第11期
页 面：729-741页
学科分类：08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程]
主 题：Continuous Welded Rail Track-Bridge Interaction Longitudinal Resistance of Ballast Bed Normal Distribution
摘 要：To get the influence of the randomness of longitudinal resistance of ballast bed (LRBB) on track-bridge interaction, the statistical law of LRBB was studied with existing test data and the Shapiro-Wilk test. Based on the principle of track-bridge interaction, a rail-sleeper-bridge-pier integrated simulation model that could consider the randomness of LRBB was established. Taking a continuous beam bridge for the heavy-haul railway as an example, the effect of the randomness of LRBB on the mechanical behavior of continuous welded rail (CWR) on bridges under typical conditions was carefully examined with a random sampling method and the simulation model. The results show that the LRBB corresponding sleeper displacement of 2 mm obeys a normal distribution. When the randomness of LRBB is considered, the amplitudes of rail expansion force, rail bending force, rail braking force and rail broken gap all follow normal distribution. As the standard deviations of the four indexes are small, which indicates the randomness of LRBB has little effect on track-bridge interaction. The distributions of the four indexes make it possible to design CWR on bridges with the limit state method.
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