列车风激励下高速铁路客站刚架结构雨棚的振动响应  

Vibration Response of Rigid Frame Structure Canopy of High Speed Railway Passenger Station Under Train Wind Excitation

作　　者：刘伯奇 冯海龙 王博 胡海天 张勇 LIU Boqi;FENG Hailong;WANG Bo;HU Haitian;ZHANG Yong(Railway Engineering Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司铁道建筑研究所,北京100081

出　　处：《铁道建筑》2022年第6期108-111,142,共5页Railway Engineering

基　　金：中国国家铁路集团有限公司科技研究开发计划项目(J2020G003)。

摘　　要：以一高速铁路客站刚架结构雨棚为研究对象,采用现场测试和仿真分析的方法对雨棚在高速列车通过时所受气动荷载和振动响应进行分析。结果表明:雨棚表面所受气动荷载头波、尾波的负压绝对值均大于正压。气动荷载极值沿雨棚纵向分布波动较小,雨棚各跨测得的气动荷载极值无显著差别。头波作用时雨棚振动速度峰峰值比尾波作用时大。受屋面板封闭和跨度增大导致的雨棚受力面积增大、刚度降低影响,振动响应增大。随着列车通过速度的提高,雨棚所受气动荷载和振动响应均显著增大。根据现场试验,复兴号动车组由300 km/h提速至350 km/h,雨棚气动荷载增大约30%,边跨振动速度增大约50%。根据仿真分析,复兴号动车组从350 km/h提高到400 km/h,雨棚振动速度增大约20%;从400 km/h提速至450 km/h,雨棚振动速度增大约30%。Taking the rigid frame structure canopy of a high speed railway passenger station as the research object,the aerodynamic load and vibration response of the canopy when the high speed train passes through were analyzed by field test and simulation analysis.The results show that the absolute negative pressure of the head wave and tail wave is greater than the positive pressure.The extreme value of aerodynamic load fluctuates slightly along the longitudinal distribution of canopy,and there is no significant difference in the extreme value of aerodynamic load measured at each span of canopy.The peak-to-peak value of canopy vibration velocity under the action of head wave is larger than that under the action of wake wave.Under the influence of roof panel closure and span increase,the stress area of canopy increases and the stiffness decreases,which eventually leads to the increase of vibration response.With the increase of train passing speed,the aerodynamic load and vibration response of canopy increase significantly.According to the field test,when the speed of Fuxing EMU is increased from 300 km/h to 350 km/h,the aerodynamic load of canopy increases by about 30%,and the vibration velocity of side span increases by about 50%.According to the simulation analysis,when the speed of Fuxing EMU is increased from 350 km/h to 400 km/h,the vibration speed of canopy increases by about 20%.When the speed of Fuxing EMU is increased from 400 km/h to 450 km/h,the vibration speed of canopy increases by about 30%.

关 键 词：高速铁路 雨棚 现场试验 仿真分析 气动荷载 振动响应 

分 类 号：U217[交通运输工程—道路与铁道工程] TU391[建筑科学—结构工程]