铁道标准设计2025，Vol.69Issue(4)：73-78,6.DOI:10.13238/j.issn.1004-2954.202307040007
公铁两用钢桁梁桥车线桥耦合动力性能影响研究
Research on Effect of Vehicle-Track-Bridge Coupling Dynamic Performance on Rail-Road Steel Truss Bridge
摘要
Abstract
Steel truss bridges are widely used in both railway and urban rail transit systems.Previous studies on vehicle-bridge vibrations primarily focused on the bridge structure,neglecting the effect of track structure vibrations.In many cases,the entire steel rail-sleeper-ballast system was treated as a secondary dead load applied to the bridge.However,with the widespread application of various track structures in modern railways and phenomena such as dynamic gauge widening under high-speed conditions,the relationship between wheels and rails has become increasingly complex.To more accurately evaluate train derailment safety and operational stability on bridges,it is necessary to consider the effect of track structure vibrations in the model.This study addressed the gap in existing vehicle-bridge vibration studies that neglect track vibration reduction structures.Taking a steel truss bridge for rail-road use in an urban rail transit system as an example,this study,based on finite element theory and vehicle-track-bridge coupling vibration analysis,investigated the dynamic performance of the bridge and the safety and ride comfort of train operations under different track vibration reduction types and operating conditions.The vertical and lateral dynamic displacements at the mid span of the bridge,as well as the indicators of safety and ride comfort for locomotives and vehicles,were calculated.The results provide a basis for selecting track types for rail-road bridges and serve as a reference for selecting track vibration reduction structures for future large-span steel truss bridges.关键词
公轨两用桥/钢桁梁桥/动力性能/车桥耦合/轨道减振类型/舒适性指标Key words
rail-road bridge/steel truss bridge/dynamic performance/vehicle-bridge coupling/track vibration reduction types/comfort index分类
交通运输引用本文复制引用
段玉振,张宏亮,张光明,陈鹏,李小珍..公铁两用钢桁梁桥车线桥耦合动力性能影响研究[J].铁道标准设计,2025,69(4):73-78,6.基金项目
杭州市建设科研项目[杭建(科)验字(2022)] （科）
