高速列车运行安全性与桥梁防撞墙受力分析  

Analysis on the Running Safety of High-speed Train and the Force of Bridge Collision-proof Wall

作　　者：向俊[1] 龚凯[1] 毛建红[1] 曾庆元[1] 

机构地区：[1]中南大学土木工程学院,湖南长沙410075

出　　处：《铁道学报》2011年第12期83-87,共5页Journal of the China Railway Society

基　　金：国家重点基础研究发展计划(2007CB714706);国家自然科学基金项目(50678176);高等学校博士学科点专项科研基金项目(20100162110022);教育部新世纪优秀人才支持计划(NCET-07-0866);牵引动力国家重点实验室开放课题(TPL0901)

摘　　要：根据列车脱轨能量随机分析理论,实现高速铁路无砟轨道桥梁上的高速列车脱轨全过程分析,计算高速列车抗脱轨安全系数。在不考虑列车纵向冲击,仅考虑列车脱轨摇摆力作用下,推导出高速铁路桥梁防撞墙受力计算公式。结果表明:高速列车在设计车速下的抗脱轨安全系数为2.0以上,脱轨摇摆力为630kN,防撞墙所受到的撞击力为33 002.4kN。鉴于高速铁路无砟轨道桥梁上的高速列车运行安全性完全有保障,且即使有意外情况发生,防撞墙亦无法防止列车脱轨后冲出桥面,因此,建议取消防撞墙。According to the theory of random energy analysis for train derailment,the whole process of high-speed train derailment on the high-speed ballastless railway bridge is analyzed and the safety coefficient for resisting derailment of high-speed trains is calculated as well.The force calculating formula of the high-speed railway bridge collision-proof wall is derived taking into consideration the situation when the train is under the action of only derailment swaying forces except for longitudinal impacts.The results show that the safety coefficient for resisting derailment of high-speed trains at the designed speed turns out to be over 2.0,the derailment swaying force is 630 kN,and the impact force on the collision-proof wall is 33 002.4 kN.In view of the fact that the running safety of high-speed trains on the high-speed ballastless railway bridge is completely warranted and that the collision-proof wall would be incapable of preventing the derailed train from shooting out of the bridge if there were an accident,thus,the author of this paper proposes to abolish the collision-proof wall.

关 键 词：高速铁路桥梁 防撞墙 撞击力 脱轨摇摆力 高速列车 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]