中南大学学报（自然科学版）2013，Vol.44Issue(7)：3053-3060,8.
铁路上承式拱桥上无缝线路断缝影响因素
Influencing factors of rail broken gap of continuous welded rail on railway deck arch bridge
摘要
Abstract
Based on the theory of interaction between girder and rail,the calculation model of rail broken gap of CWR (continuous welded rail) on deck arch bridge was established.Taking a single-line railway deck arch bridge as an example,influences of bridge structure,pier stiffness and railway lines on rail broken gaps were analyzed.The results show that the higher arch ring temperature is,the larger rail broken gap is,and there is a approximate linear relationship between them.Structure with smaller arch ring stiffness and column pier stiffness has bigger rail broken gap.Rail brokens of different places on the bridge have greatly different gaps.When the rail broken is near mid-span of arch bridge,the gap gets to be minimum.In addition,small resistance fasteners laying and railway lines on the bridge both have varying degrees of impact on rail broken gap.Formula method will underestimate the rail broken gap,so it is suggested that the theory of interaction between girder and rail be used to calculate rail broken gap of deck arch bridge.关键词
上承式拱桥/无缝线路/断缝/ABCWR软件Key words
deck arch bridge/ continuous welded rail/ rail broken gap/ ABCWR software分类
交通工程引用本文复制引用
魏贤奎,王平,徐浩,陈嵘,肖杰灵..铁路上承式拱桥上无缝线路断缝影响因素[J].中南大学学报（自然科学版）,2013,44(7):3053-3060,8.基金项目
国家自然科学基金资助项目(51008256,51078320) （51008256,51078320）
西南交通大学博士创新基金(2012) （2012）
