大跨度悬索桥钢箱主梁涡振性能优化风洞试验研究  

Optimization of the vortex induced vibration for steel box girder of long span suspension bridges by wind tunnel test

作　　者：李永乐[1] 侯光阳[1] 向活跃[1] 周平 廖海黎[1] 

机构地区：[1]西南交通大学桥梁工程系,四川成都610031 [2]四川宜泸高速公路开发有限责任公司,四川宜宾644000

出　　处：《空气动力学学报》2011年第6期702-708,共7页Acta Aerodynamica Sinica

基　　金：国家自然科学基金(90915006);教育部新世纪优秀人才支持计划(NCET-06-0802);四川省杰出青年学科带头人计划(2009-15-406)

摘　　要：以某大跨度钢箱梁悬索桥为工程背景,该桥桥面高速公路与人行道并存,桥面栏杆较多,且设置了防抛网,主梁竖向及扭转涡振明显。通过节段模型风洞试验研究了检修车轨道位置、桥面栏杆、分流板以及攻角和阻尼等对主梁涡激振动性能的影响,提出了优化主梁涡振的气动措施。试验结果表明,优化检修车轨道位置和在主梁风嘴处设置分流板能有效地抑制主梁涡振。A long span suspension bridge with steel box girder is regarded as an engineering example. The deck has both expressways and sidewalks. There are many railings and protective nets on bridge deck, which induces re- markable vertical and torsional vortex induced vibration of bridge deck. By the section model wind tunnel test, the effects of maintenance car tracks, railings on the deck, flow splitter plates, attack angle and damping on the vortex-in- duced vibration （VIV） are investigated, the optimization measurements are presented to reduce the vortex induced vi- bration. The results of the wind tunnel tests show that the vortex induced vibration of this bridge can be effectively suppressed by optimizing the location of maintenance car tracks and installing flow splitter plates at wind nodes.

关 键 词：大跨度悬索桥 涡激振动 风洞试验 检修车轨道 分流板 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]