Study of Wind-Train-Bridge Coupling Vibration of Multi-Track Railway Bridge Under Meeting of Two Trains

作者：XU Xin-yu; LI Yong-le; CHEN Ke-yu; CHEN Ke-jian

来源：桥梁建设, 2017, 47(1).

DOI：10.3969/j.issn.1003-4722.2017.01.008

• multi-track railway
• cable-stayed bridge
• meeting of two trains
• wind-train-bridge coupling vibration
• acceleration
• displacement
• torsion angle

To study the dynamic responses of the multi-track railway bridge under the meeting of two trains under the wind load,a six-track double-deck railway cable-stayed bridge was taken as an example and the analysis software BANSYS for bridge structures was used to set up the finite element model.The wind-train-bridge coupling vibration of the bridge under the meeting of the two trains of different combinations was analyzed,the dynamic responses of the trains and bridge under different load cases were calculated and the influences of the transverse spacing distances,relative positions of the trains and bridge and the winds speeds on the dynamic responses of the trains and bridge under the meeting of the two trains were studied.The results of the study demonstarte that in course of the meeting of the two trains,the change of the acceleration of the train on the windwrad side is not significant while the change of the acceleration of the train on the leeward side becomes great significantly.The transverse spacing distances of the two trains have the influences of different degrees on the transverse acceleration of the train on the leeward side and the vertical acceleration of the train has significant sudden change.The transverse spacing distances have slight influence on the the transverse displacement of the bridge and almost has no influence on the vertical displacement.When the transverse spaing distances of the two trains are the same,the acceleration of the train on the track close to the the wind direction under the meeting of the two trains is greater than that of the train on the track far from the wind direction.The acceleration of the train on the windward side increases with the increase of the wind speeds and the transverse displacement at the midspan of the bridge becomes great with the increase of the wind speeds,however,the influences of the wind speeds on the vertical displacement and torsion angles are slight.

• 出版日期2017
• 单位西南交通大学