提速列车作用下上承式钢板梁受迫振动实验研究

详细信息

EXPERIMENT ON FORCED VIBRATION OF STEEL SHEET GIRDER UNDER RAISED-SPEED TRAINS

Northern Jiaotong University, Beijing 100044;2. Shenyang Railway Bureau, Shenyang 110001

摘要: 本文通过对京哈线下行大清河桥第9孔33.6m上承式钢板梁桥的现场实验结果的分析,以测试孔跨中实测横、竖向振幅为依据,较为详尽地研究了在提速列车作用下桥梁的自身的动力特性及其在提速列车作用下的动力响应,给出了在不同列车运行速度、不同列车编组情况下桥梁横、竖向振幅以及一阶受迫振动频率的变化关系,并对桥梁在列车通过时的桥梁的振动形态、结构的薄弱点及其加固方向进行了初步的探讨。
- 提速列车 /
- 上承式钢板梁桥 /
- 动力试验
Abstract: The in situ experiment result of the 9th span of Daqinghe Railway Bridge on the route from Beijing to Harbin is analyzed in this paper. Based on the lateral and vertical amplitude history gained from the experiment, the dynamic characteristics of the bridge and its response under raised-speed trains are studied. The relationship between different speed and organization of passing train and the bridge's lateral and vertical amplitude and forced vibration frequency are summarized. Also, the vibration mode of the bridge, the weakness of the structure and its reinforcing method are discussed in this paper.
- raised-speed train /
- steel sheet girder bridge /
- dynamic experiment