Influence of High Speed Trains on Structural Vibration of Underground Stations in Integrated Transportation Hubs
Take the Jinan Yaoqiang integrated transportation hub as an engineering case,a vibration coupling model of vehicle-track-station structure was established based on the CRTSⅢ type ballastless track.The time-frequency domain analysis method was used to analyze the vibration transmission characteristics between the track and the station structure under different train speeds,and the vibration response characteristics and vibration damping effects of the roof structure under different damping cushion stiffness.The results show that when the train passes at a speed of 80 km/h,the absolute values of the vibration acceleration of the rail,the track slab,the side wall and roof of the station structure decrease sequentially,and the peak vibration acceleration level of the roof of the station structure is at a frequency of 100 Hz.The maximum vibration level of frequency division and the maximum Z vibration level of the side wall and roof of the station structure increase with the increase of train speed,the increase of the maximum Z vibration level of the side wall and roof of the station structure is greater than that of the maximum vibration level of frequency division.The maximum vibration level of frequency division and the maximum Z vibration level of the side wall of the station structure are greater than that of the roof under different train speeds.Reducing the stiffness of the damping cushion can effectively reduce the maximum Z vibration level of the roof of the station structure.When the train passes through the strands at different speeds,the same vibration reduction effect can be achieved by the track structure with different damping cushion stiffnesses.
high speed trainintegrated transportation hubnumerical simulationstation structuretime-frequency domainmaximum Z vibration leveldamping cushion stiffness
万方数据
维普
