西南交通大学学报2012，Vol.47Issue(3)：361-366,6.DOI:10.3969/j.issn.0258-2724.2012.03.002
大跨度钢桁斜拉桥上无缝线路制动力的计算
Calculation of Braking Force of Continuous Welded Rail on Large-Span Steel Truss Cable-Stayed Bridge
摘要
Abstract
In order to probe into the transmission mechanism of braking force on continuous welded rail (CWR) on a large-span steel truss cable-stayed bridge, a plane model for bridge-rail interaction was established based on the finite element method and the bridge-rail interaction theory. In this model, all structural characteristics, such as steel truss, stay cables, main towers, and viscous dampers, are involved. The influences of stay cable stiffness, main tower stiffness and viscous dampers on the braking force were analyzed, and a simplified algorithm for the braking force was proposed. The results show that braking force can meet the demands of paving CWR on cable-stayed bridges, and its distribution regularity is the same as that on conventional bridges; viscous dampers improve the bridge-rail interaction in train braking situation by reducing bridge-rail relative displacement and braking force; compared with the stiffness of main towers, the stiffness of stay cables has a great influence on the braking force, so it should be taken into account in CWR design of a cable-stayed bridge.关键词
斜拉桥/桥上无缝线路/制动力/梁轨相互作用Key words
cable-stayed bridge/ continuous welded rail on bridge/ braking force/ bridge-rail interaction分类
交通工程引用本文复制引用
赵卫华,王平,曹洋..大跨度钢桁斜拉桥上无缝线路制动力的计算[J].西南交通大学学报,2012,47(3):361-366,6.基金项目
国家自然科学基金资助项目(51078320) （51078320）
铁道部科技开发计划资助项目(2008G002-b) （2008G002-b）
