Study on aerodynamic stability and anti-vibration measures of streamlined box girder

2018 International Conference on Civil and Hydraulic Engineering

土木建筑工程;水利工程

Yuan, Daping^1 ; Zheng, Shixiong^1 ; Yang, Fengfan^1 ; Hong, Chengjing^1

Key Laboratory for Wind Engineering of Sichuan Province, Southwest Jiaotong University, Chengdu

610031, China^1

关键词: Antivibration;    Flutter stability;    Flutter suppression;    Inhibition effect;    Scale ratio;    Segment modeling;    Steel box girders;    Vortex induced vibration;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/189/4/042021/pdf
DOI  :  10.1088/1755-1315/189/4/042021

学科分类：土木及结构工程学

来源: IOP

【 摘 要 】

To study the vortex induced vibration and flutter stability of streamlined box girder and the relevant anti-vibration measures, a large-scale segment model, which has a scale ratio of 1:40, of a large-span steel box girder suspension bridge was tested in a wind tunnel. In the test, some measures, such as changing the position of track of the overhaul vehicle and adding a central stabilizer, were taken to check the anti-vibration effect. The test results show that: when the central stabilizer is added, the flutter suppression effect is remarkable, and there is no obvious vortex anti-vibration effect; when the track of the overhaul vehicle is located in the middle of the main girder oblique web plate, suppression for vortex induced vibration is obvious, as for flutter, there is no inhibition effect, but excitation effect; when the track of the overhaul vehicle is located in the middle of the main girder oblique web plate and the central stabilizer is added at the bottom of the girder, the flutter and vortex induced vibration stability are effectively improved.