高铁列车脱轨撞击下客站雨棚结构倒塌破坏影响因素  

The influences of progressive collapse of rail station platform area under impact of high-speed train derailment

作　　者：康翔杰 许浒[1] 赵世春[1] 刘艳辉[1] 杨畅[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《四川建筑科学研究》2015年第6期1-5,共5页Sichuan Building Science

基　　金：国家自然科学基金面上项目(51378427);铁道部科技研究开发计划项目(2012G003-J);中央高校基本科研业务费专项资金(2682014CX073)

摘　　要：为了研究列车脱轨冲击作用下影响高铁客站站台区域雨棚结构倒塌破坏的主要因素,提高客站雨棚结构的抗连续倒塌能力,以CRH2型动车模型为冲击体,基于CRH2型高速动车正线脱轨假设,在冲击速度为54.53 m/s的条件下对常见高铁客站站台结构柱进行了冲击仿真分析。从冲击物能量耗散的角度分析了冲击作用下钢管混凝土柱的破坏过程,讨论了影响钢管混凝土柱抗撞击能力的主要因素,分析了高铁客站站台区域多根钢管混凝土柱发生连续破坏的情况。研究表明,钢管混凝土柱抵抗撞击破坏的能力主要受到柱体刚度的影响,钢材强度、混凝土强度和含钢率的影响依次减弱。基于钢管混凝土柱的破坏特点和列车能量滑移衰减规律,得出结构柱等间距条件下,控制常见高铁客站雨棚结构柱破坏数量的临界柱距。This paper studies influences on continuous failure of concrete filled steel tubular（CFST） columns located in platform area of high-speed rail station under impact loading of train derailment, to improve the progressive collapse resisting capacity of platform roofing. The impact simulation test is carried on. CRH2 type motor train is the impactor. And it is assumed that train intervals on metro lines. The impact speed is 54. 53 m/s. The destruction process of CFST column is analyzed from an energetic standpoint. The main factors that influence the anti-shock capability of CFST column are discussed. The process of destruction is studied in the case that more than one CFST column is damaged. Researches show that the columns stiffness is the critical factor influence CFST column anti-shock capability, the incidence of steel-strength concrete-strength and steel-ratio decreases successively. Based on the characteristics of CFST column failure and the kinetic energy attenuation rule of train, the critical column space that control the number of failure CFST columns is obtained when the columns are equally spaced.

关 键 词：列车脱轨 高铁客站 冲击作用 钢管混凝土柱 连续破坏 

分 类 号：TU311.3[建筑科学—结构工程]