地震作用下445 m上承式高速铁路拱桥行车安全分析  

Train Running Safety Analysis of High-speed Railway Deck Arch Bridge of 445 m Span under Earthquake Action

作　　者：雷虎军[1] 黄江泽 LEI Hu-jun;HUANG Jiang-ze(Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]福建工程学院,福州350118

出　　处：《铁道标准设计》2018年第11期88-93,共6页Railway Standard Design

基　　金：国家自然科学基金(51608120);福建省自然科学基金(2016J05108);福建省教育厅中青年教师教育科研项目(JA15333);福建工程学院科研启动基金(GY-14077)

摘　　要：为研究地震对高速铁路超大跨上承式拱桥行车安全性的影响,采用自主研发的列车-轨道-桥梁-地震分析系统程序TTBSAS,以一座445 m上承式钢筋混凝土拱桥为例,通过相对运动法输入3条实测地震波进行仿真计算,探讨不同地震波输入对计算结果的影响,以及有/无震下不同编号车辆动力响应的幅值分布规律,给出地震时CRH3高速列车通过该桥时的地震动阈值。结果表明:地震波的选择对计算结果的影响显著;无震时,车辆动力响应与车辆参数关系密切,可采用第1辆车(动车)和第2辆车(拖车)的动力响应来评判整列车的行车安全性与乘坐舒适性,有震时,地震动的非平稳性成控制因素,需综合考虑所有编号车辆的动力响应;地震动阈值随车速的增加而减小,当车速为300 km/h时,445 m上承式钢筋混凝土拱桥的地震动阈值为0. 15g。In order to analyze the running safety of the high-speed train running over a super-long-spandeck arch bridge subjected to earthquake action, a developed program of seismic-train-track-bridgeanalytic system named TTBSAS is adopted. With reference to a reinforced concrete top-bear arch bridgeof 445m span, three earthquake waves are input by relative movement method to calculate the dynamicresponses of the vehicle and bridge system. Detailed numerical simulations are conducted to identify theeffects of earthquake wave on the dynamic responses and the distribution law of dynamic responseamplitudes of different numbered vehicles under seismic and aseismic actions. Finally, the earthquakethreshold of the CRH3 high-speed train running over this bridge is provided. The results show that theselection of earthquake wave has great influence on the dynamic response of the coupling system; thedynamic response of the vehicle is closely related to vehicle parameters when no earthquake occurs, andthe dynamic responses of the first vehicle and the second vehicle can be used to judge the running safetyand ride comfort of the train; when an earthquake occurs, the non-stationary of the earthquake movementbecomes the control factor, and dynamic responses of all vehicles should be taken into considerationcomprehensively; the earthquake threshold is decreased along with the increase of the train speed and itis 0. 15g when the train runs at the speed of 300 km/ h.

关 键 词：车桥耦合振动 行车安全性 大跨度拱桥 脱轨系数 地震动阈值 

分 类 号：U448.22[建筑科学—桥梁与隧道工程]