边主梁叠合梁涡振性能气动优化措施风洞试验研究

李春光,黄静文,张记,韩艳

振动与冲击 ›› 2018, Vol. 37 ›› Issue (17) : 86-92.

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (17) : 86-92.
论文

边主梁叠合梁涡振性能气动优化措施风洞试验研究

  • 李春光,黄静文,张记,韩艳
作者信息 +

Aerodynamic optimization measures for VIV performances of a side girder composite beam based on wind tunnel tests

  • LI Chunguang,HUANG Jingwen,ZHANG Ji,HAN Yan
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文章历史 +

摘要

本文以某大跨双边主梁钢混叠合梁斜拉桥为工程背景,通过风洞试验研究钝体主梁断面的涡振性能并提出合理的气动优化措施。试验发现边主梁叠合梁开口截面主梁在低风速下容易发生涡激共振,且随攻角由正变负涡振性能愈发不利。气动措施优化结果表明边主梁底部设置外侧设置水平稳定板比在内侧设置水平稳定板效果明显。而梁底竖向稳定板对 竖向涡振起到一定抑制作用,但是却导致扭转涡振加剧;检修道栏杆顶部抑流板的制涡效果优于在梁底设置水平稳定板,说明主梁断面上部构造对其涡振性能影响更显著。而在边主梁两侧设置风嘴,其制涡效果最好,涡振幅值抑制率达80%。

Abstract

A cable-stayed bridge with a side girder steel-concrete composite beam was taken as engineering background,Based on the side girder section-model’s wind tunnel tests,the vortex-induced vibration (VIV) performances of this blunt shaped composite deck were investigated and reasonable aerodynamic optimization measures were proposed. The test results showed that the open section girder of the side girder composite beam is easy to have vortex induced resonances under the condition of lower wind speed,and its VIV performances gradually get worse with decrease in wind attack angle; aerodynamic optimization measures make the effect of an outside horizontal stabilizer at the bottom of the side girder be better than that of inside  horizontal stabilizer; a vertical stabilizer installed at the bottom of the side girder can suppress the vertical VIV to some extent,but it causes the girder’s torsional VIV rising; the anti-vortex effect of a flow suppression board at the overhauling railing top is better than that of a horizontal stabilizer at the bottom of the side girder,so the superstructure of the side girder has a more significant influence on its VIV performance; wind fairings installed at both sides of the side girder have a best anti-vortex effect,the suppression rate of VIV amplitude can reach 80%.


关键词

边主梁叠合梁 / 涡激共振 / 气动措施 / 风洞试验

Key words

side girder composite beam / vortex-induced vibration (VIV) / aerodynamic control / wind tunnel test

引用本文

导出引用
李春光,黄静文,张记,韩艳. 边主梁叠合梁涡振性能气动优化措施风洞试验研究[J]. 振动与冲击, 2018, 37(17): 86-92
LI Chunguang,HUANG Jingwen,ZHANG Ji,HAN Yan. Aerodynamic optimization measures for VIV performances of a side girder composite beam based on wind tunnel tests[J]. Journal of Vibration and Shock, 2018, 37(17): 86-92

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