铁道科学与工程学报2017，Vol.14Issue(1)：19-25,7.
重载汽车荷载下平交道口的钢轨伤损分析
The rail failure analysis under the heavy-duty vehicle load on level crossing
摘要
Abstract
The rail crack between rail head and the bottom of rail web usually appeared on level crossing outside of industrial railways. This paper established the finite element model of level crossing to analysis the stresses and displacement of running rail under the condition of different lateral support ( unsupported, continuous support with upturned rail, continuous support with different stiffness, discontinuous spring support) . The results showed that small lateral support stiffness and lateral without support led to the large vertical stress of running rail web under the impact of the heavy-duty vehicle load. It will lead to the rail crack. The crack expand along the verti-cal line of running rail under the effect of repeated loading, and the maximum lateral displacement of running rail head was 2.4 mm that affected the running safety. It is better to support running rail with upturned rail on the straight line section of level crossing. On the curve section of level crossing or considering other materials instead of upturned rail, this paper recommended that the continuous support materials that its stiffness of 50~100 kN/mm instead of upturned rail.关键词
平交道口/横向支撑/重载/伤损/裂纹Key words
level crossing/lateral support/heavy-duty vehicle/rail failure/crack分类
交通工程引用本文复制引用
苏乾坤,栗行,谢露,田杰,杨荣山..重载汽车荷载下平交道口的钢轨伤损分析[J].铁道科学与工程学报,2017,14(1):19-25,7.基金项目
国家自然科学基金资助项目( U1434208) （ U1434208）
