客运专线某钢管混凝土提篮拱桥列车走行性分析

针对武广客运专线胡家湾大桥,提出单箱三室箱形系梁的钢管混凝土拱桥空间振动分析模型,建立了高速列车-桥梁系统振动方程。运用列车脱轨能量随机分析理论,计算了胡家湾大桥上列车走行安全性。提出桥梁抗脱轨安全系数的计算式,并计算了该桥的抗脱轨安全系数。在列车不会脱轨的条件下,计算了该桥上列车走行舒适性。计算结果表明:ICE列车以不超过300 km/h车速通过该桥时,列车不会脱轨;桥梁抗脱轨安全系数很大,具有很高的抗脱轨安全度;在列车正常运行时,舒适性指标达到了良好以上等级。研究成果可为该桥设计提供理论依据。

Analysis of train running performance on a basket handle arch b ridge of concrete-filled steel tube on passenger special line

Aiming at Hujiawan bridge on Wuhan-Guangzhou passenger special line,the calculation model for basket handle arch bridge with box girder of a box and three rooms was presented,and the vibration equation of high-speed train-bridge system was established.Based on the theory of energy random analysis for train derailment, train running safety on Hujiawan bridge was calculated.The calculation formula of safety factor for bridge resisting derailment was put forward,and the safety factor for resisting derailment on the bridge was calculated.When train will not derail,the running comfort on the bridge was calculated.The calculated results show that ICE train will not derail on the bridge under the speed of 300 km/h,and the safety factor for resisting derailment is large relatively,and the degree for resisting derailment on the bridge is high,and the running comfort of train on the bridge is good.The analysis results may provide reference for design of the bridge.