铁道标准设计2017，Vol.61Issue(5)：54-57,4.DOI:10.13238/j.issn.1004-2954.2017.05.012
重载铁路非等跨简支梁桥上无缝线路纵向力研究
Longitudinal Force of CWR on Unequal Span and Simply-supported Beam Bridges on Heavy Haul Railway
摘要
Abstract
In order to study the longitudinal force of CWR (continuously welded rail) on unequal span and simply-supported beam bridges, a finite element model is established for the interaction between 6-32m+40m+6-32m (30t axle) heavy haul railway simply-supported T beam and the track.The stress and deformation characteristics of system due to temperature-increase, vertical live load, brake and earthquake are studied in comparison with the 13-32m simply supported beam.The influences of the unequal span and simply supported beam (40m simply supported beam) on the system are analyzed.The studies show that the rail peak force is concentrated where simply supported beams are connected and in mid span;under the action of earthquake, the rail and the pier are subject to huge longitudinal force;the impact of the unequal span and simply supported beam bridge on contractility and bending force is larger, which increases the rail tensile stress by 70%, rail flexural stress by 50%, and partial pier top flexural stress by 50%;the influence of unequal span and simply supported beam bridge on the braking force and earthquake force is small.关键词
重载铁路/铁路桥梁/简支梁/无缝线路/纵向力Key words
Heavy load railway/Railway bridge/Simply-supported beam/Continuously welded rail/Longitudinal force分类
交通工程引用本文复制引用
于哲..重载铁路非等跨简支梁桥上无缝线路纵向力研究[J].铁道标准设计,2017,61(5):54-57,4.基金项目
国家自然科学基金项目(51268016) （51268016）
