华中科技大学学报：自然科学版2012，Vol.40Issue(9)：85-88,4.
高速铁路斜拉桥上无缝线路断缝值研究
Rail broken gap study on continuous welded rail on cable-stayed bridge of high-speed railway
摘要
Abstract
In order to investigate the regulation characteristics of the rail broken gap of continuous welded rail(CWR) on the cable-stayed bridge,an integral finite element model of cable stayed bridge for track-bridge interaction was established via applying a reliable nonlinear simulation method for track-bridge interaction,involving the effect of the substructure(pier,abutment,piles).Then taking a single-tower cable-stayed bridge with a span of(32+80+112) m on high speed railway in China as a case study,factors such as longitudinal resistance model,longitudinal restraint of the cable-stayed bridge,the rail fracture position,the live load,the temperature varying of bridge deck and cables on the rail broken gap were discussed.It can be concluded that longitudinal resistance model described in code for railway CWR design is recommended;when the bridge tower and the bridge deck is fixed or connected with fix support,the rail broken gap is reduced effectively;the minimal rail broken gap is about 1.0 cm when rail fractures near the bridge tower,so it's better to set rail expansion joint at the bridge tower;the braking-deflection action and the temperature varying in the bridge deck have larger impact on the rail broken gap,therefore,they should be one of the key consideration in analysis.关键词
铁路桥梁/铁路安全/有限元模型/斜拉桥/梁轨相互作用/断缝值Key words
railroads bridge/rail safety/finite element model/cable-stayed bridge/track-bridge interaction/broken gap分类
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郑鹏飞,闫斌,戴公连..高速铁路斜拉桥上无缝线路断缝值研究[J].华中科技大学学报：自然科学版,2012,40(9):85-88,4.基金项目
国家自然科学基金资助项目 （）
