金温线武义江桥列车走行性与行车安全指标研究  

Train running performance and traffic safety index for Wuyi river bridge of Jinwen line

作　　者：周智辉[1] 张军[1] 秦文孝[1] 曾庆元[1] 

机构地区：[1]中南大学土木工程学院,长沙410075

出　　处：《振动与冲击》2011年第10期9-13,共5页Journal of Vibration and Shock

基　　金：国家重点基础研究发展计划资助项目(2007CB714706);国家自然科学基金项目(50908232;50678176);国家博士后基金特别资助项目(201009525);中南大学博士后基金资助项目(2008);中南大学前沿研究计划资助项目(2010QZZD019)

摘　　要：运用列车脱轨能量随机分析理论分析了金温线武义江桥列车走行性。计算结果表明尽管该桥横向振幅超过《检规》行车安全限值,但列车走行安全性、平稳性与舒适性有保障,在现行行车条件下,不需要对该桥采取加固或限速措施。对比超限桥梁横向振幅与《检规》行车安全限值可知,现有的桥梁横向振幅行车安全限值过于严格。基于列车脱轨能量随机分析理论,提出了铁路桥梁行车安全指标分析方法。具体内容为:确定桥梁跨中横向振幅作为梁墩系统行车安全判别参数,计算找出保证列车安全、平稳及舒适运行的临界梁墩系统,计算出临界梁墩系统跨中横向振幅作为桥梁行车安全限值。算出了金温线武义江32 m预应力混凝土T形梁桥横向振幅行车安全限值为L/6200,研究成果已被金温铁路公司采纳。The train running performance of Wuyi river bridge was analyzed with energy random analysis theory for train derailment.The calculated result showed that though the lateral amplitude exceeds the limit value of traffic safety given by the code,the train running safety,smoothness and comfort on Wuyi river bridge can be guaranteed under the existing operation condition,and the measures of rate-limiting or reinforcement are not needed to be taken for this bridge.By comparison between the lateral amplitude of the bridge and the limit value of traffic safety,it was shown that the existing limit value of traffic safety of the lateral amplitude is too conservative.A method for establishing index of traffic safety for railway bridge was proposed based on the analysis theory for train derailment,and the detailed contents were as follows： the lateral amplitude of the middle of the bridge beam was taken as an index of traffic safety for the system of beam and pier;the critical system of beam and pier to guarantee the train running safety,smoothness and comfort was determined;the lateral amplitude of the critical system of beam and pier was calculated and taken as a limit value of traffic safety.The limit value of lateral amplitude of traffic safety for Wuyi river bridge was deter mined as L/6200,and the study results were accepted by Jinwen railway corporation.

关 键 词：铁路桥梁 横向振幅 行车安全 限值 列车脱轨 

分 类 号：U447[建筑科学—桥梁与隧道工程] U441.7[交通运输工程—道路与铁道工程]