京沪高铁济南黄河桥有砟-无砟过渡段车-线-桥动力特性研究  

RESEARCH ON DYNAMIC BEHAVIOR OF BALLASTED-BALLASTLESS TRANSITION SECTION ON JINAN YELLOW RIVER BRIDGE OF THE BEIJING-SHANGHAI HSR

作　　者：高芒芒[1] 熊建珍[1] 李伟[1] 

机构地区：[1]中国铁道科学研究院,北京100081

出　　处：《钢结构》2015年第6期5-9,34,共6页Steel Construction

基　　金：中国铁路总公司科技研究开发计划重大课题资助项目(2013B001-A-2)

摘　　要：京沪高铁济南黄河桥主桥上采用有砟轨道,引桥上采用CRTS I型板式无砟轨道,有砟-无砟过渡段分界点位于32m简支箱梁梁端位置。建立"无砟线路-4跨32m无砟轨道线桥结构-4跨32m有砟轨道线桥结构-有砟轨道"动力分析模型,通过车-线-桥垂向动力性能分析,考察不同轨道平顺状态、不同道床刚度以及不同车速下380AL动车组通过时的轨道结构和车辆运行品质。结果表明,过渡段区域的刚度变化引起了轮轨之间的冲击,道床刚度增大对车体加速度无明显影响,但会引起构架加速度和轴箱加速度的增大,且随车速提高影响更为显著。The ballasted track and CRTS I ballastless track are respectively used on main and approach bridge of Jinan Yellow River Bridge of the Beijing--Shanghai HSR, and the dividing point of ballasted-ballastless transition section is located on the beam end of a 32 m simply supported beam. Throngh the research of vertical dynamic performance of train-track bridge transition section and a dynamic analysis model consists of a ballastless track, a 32-meter wide four-span ballastless track, a 32-meter-wide four-span ballasted track, a ballasted track. The influence of track regularity,ballast bed rigidity and vehicle speed on running quality and track has been studied. The results showed that different ballast bed structure in transition section could lead to wheel-rail impact. Increased track bed rigidity had no significant influence on the acceleration of car body, but it could increase the acceleration of bogie and axle box. This phenomenon was more significant when the vehicle speed was increased.

关 键 词：有砟轨道 无砟轨道 有砟-无砟过渡段 道床刚度 不平顺 行车安全性 轴箱加速度 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U211.3[交通运输工程—道路与铁道工程]