摘要
通过常规比例及大比例节段模型风洞试验,对榕江大桥钢箱梁断面的涡振特性进行了研究,并在此基础上分析了栏杆改形、风嘴改形以及两者的综合改形等三种断面优化措施的有效性,结果表明原始断面在+5°和+3°攻角情况下发生了超规范容许值的扭转涡激振动;在采用综合改进的断面优化措施后,±5°攻角范围内没有观察到明显的竖向及扭转涡激振动。
Large-scale and conventional-scale section models wind tunnel tests were carried out to investigate the aerodynamic and aeroelastic behaviors,especially the Vortex-Induced Vibration( VIV)performance of steel box girder of Rongjiang River Bridge. Moreover,the effect of vi-bration suppression of the different aerodynamic measures,including the modifications of railing,wind fairing and former two measures,were studied to optimize the steel box girder cross-section. The results showed that the flutter performance of original cross-section meet requirements, while the VIV was found with the attack angles of +5° and +3°. However,no VIV was found with the attack angles from -5° to +5° by modi-fication of both railing and wind fairing.
出处
《山西建筑》
2015年第24期168-169,共2页
Shanxi Architecture
关键词
节段模型
风洞试验
涡激共振
气动措施
section model
wind tunnel test
Vortex-Induced Vibration
aerodynamic measures