多主跨连续钢桁梁拱桥涡振性能的风洞试验研究

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中图分类号：U24;TU33+8 文献标志码：A DOI:10.16385/j.cnki.issn.1004-4523.202403014

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Vortex-induced vibration performance of multi-span steel truss beam arch bridge by wind tunnel tests

XIANG Huoyuel², ZHANG Liang12,，SUN Zonglei123, ZHANG Shang4, LI Yongle12 (1.State KeyLaboratoryofBridge Inteligentand Gree Construction，Southwest Jiaotong University，Chengdu ，China; 2.ScholofCivilEngiering，outhwestotongUiversityChengdu03，Chia；3.ChinaRailwayEconomicandPlangearch Institute Co.，Ltd.，Beijing ，China；4.China Railway Design Corporation，Tianjin ，China）

Abstract:Hgpedtraieequmntsfortetyodgs，astaidersvorte-idedvatioll the bridge’s line-type and affect traffc safety. Therefore，there is a high demand for VIV performance.Taking a 350km/h multi-span longcoupledstifenedcontiuoussteltussbeamarchbidgeasanexample，asgmentmodelwindtuneltest wascoductedtostudytheVIV performanceofthemaingirder.Tecontrolefectofdampingratio，windnozle，andflowdeflectorsontheVIVofthemaingirderwas discussed.AndtheefectofarchribsontheVIVofthemaingirderasstudiedthrouhfiniteelemenaalysis.Theresultsindicatethate original girder beam exhibits noticeable vertical VIVat -3∘ and 0∘ wind attack angle.When the damping increases to 0.80% ，it still cannot completelysuppresstheVVoftemaingirder.Wenthdampingatioisghthefull-ridgestructurewillreduceteverticalVVofte maingirder.Afterinstalingwindnozlesorsuspendedflowdeflectorsontelowerchord，thevertical VIVofthemaingrdercanbe effectively suppressed.

Keywords:vortex-induced vibration(VIV); wind tunnel test;steel trussbeam;archbridge;aerodynamicmeasure

2020年，武汉鹦鹉洲大桥、广州虎门大桥和舟山西堠门大桥等多座桥梁接连发生桥面竖向涡激振动（vortex-inducedvibration,VIV)现象[1-2],桥梁涡激振动现象逐渐成为社会和舆论关注热点。（剩余14686字）