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43820134BuildingStructureVol．43No．8Apr．2013610031。。。。。。TU312+.1TU973.2+13A1002-848X201308-0032-04Analysisonacrosswind-induceddynamicresponsesforaringstructureLuoNanLiaoHailiLiMingshuiResearchCentreforWindEngineeringSouthwestJiaotongUniversityChengdu610031ChinaAbstractAcrosswind-induceddynamicresponsesontallbuildingswhichismainlycausedbyvortex-inducedvibrationaredrawnmuchattentioninthefieldsofwindengineeringandstructureengineering．Theformationandinfluencingfactorsofvortex-inducedvibrationforaringstructurewereintroduced．SpecificationsdonotprovidetheStrouhalnumberforthisparticularstructuresothestart-upwindvelocityofacrossvortex-inducedvibrationcannotbedetermined．Inthisstudythestart-upwindvelocityofvortex-inducedvibrationwasobtainedbytheaeroelasticmodeltestandaccelerationresponsesincasesofvariouswinddirectionswereinvestigated．Thentestresultswereappliedintherealstructuretoanalyzetheinfluencingfactorsofacrossvortex-inducedvibration．Theresultsdemonstratethatthewinddirectionhasgreatestimpactonvortex-inducedvibrationfortheringstructurewhilethedampingratioofthestructureandtheturbulenceintensityoftheflowhavesmallerimpact．Thereforethesituationthatthepositionofringstructuresisperpendiculartothemainwinddirectionshouldbeavoided．Keywordsringstructurevortex-inducedvibrationaeroelasticmodelwinddirectionEmailloge82@163．com。0。1。2。、、。34、。。5。6。7。。。、。。。438．11.184m97m8m9m。35.5m35.5m-。。。11∶9。。1.2。。V2/gDEA/ρV2D2EI/ρV2D4GJ/ρV2D4m/ρD2Im/ρD4ζ。ρVDgEAEIGJ、mImζ。、、、。1。1CL1/nCEA1/m2n2CF1/n2CEI1/m2n4Cρ1CGJ1/m2n4CV1/mCm1/n2Cfn/mCIm1/n4Ctm/nCδ1Can/m2nm。。XNJD-13.6m×3.0m×。0.5～22.0m/s。360°。、1∶807.510.7。1223、。1.05%。2/Hz/Hz/Hz/%10.47753.58133.587.49741.0520.60264.51954.467.40131.0931.04207.81507.937.61041.121233320132。StmSto=fmDmV()mfoDoV()o=11StfDVmo。22.1Re＞90。。89。St=fvD/V2fvfv。2.210。。0°～180°3。90°90°4。90°V=2.1～2.5m/s2.1m/sStm=fmDmVcrm=3．58×0．11252．1≈0．19183DmfmVcrm。2.3Bw00.45kN/m2。10mV10=2000w0槡ρ=27．1m/s4ρ。VcroVcro=fv0D0Sto=fv0D0Stm=0．4775×90．1918≈22．4m/s5DofoVcro。11Vcr1.3Vcr。H1H2H1=10VcroV()101α=10×22．427．()110．16=3．0m6H2=101．3VcrV()101α=10×22．4×1．327．()110．16=15．7m7α。84m。3。3.190°1.98m/s290°5。90°。3.20.01～0.02-0.025～0.035。1.05%1.05%。1251.05%1.2%1.35%1.5%1.65%。20～30cm。43438．4590°690°7α=0.158892%。90°6。3.3、。。《》GB50009—2001200610α。Bα=0.16。、、。α0.158716%8。78ZZGVZZVGTu。910m。90°V=23～25m/s。BB。41。。2。390°1.98m/s2。90°。。4。9653201354.57mm。2#3#Δs=0.3036‰G24G25。20101220116157d0.02～0.03mm/d《》JGJ8—20075。5L-T-sCFG。121CFGCFG。2-、、。3。4CFG2001/6CFG。CFG。、、1JGJ79—2002S．2002．2．CFGM．2．2006．3JGJ94—2008S．2008．4GB50007—2011S．2012．35。590°。。1．———J．200434739-43．2．J．200434733-35．3KWOKKCSMELBOURNEWH．Wind-inducedlock-inexcitationoftallstructuresJ．JournaloftheStructuralDivision1981107ST165-82．4KAREEMA．FluctuatingwindloadsonbuildingsJ．JournaloftheEngineeringMechanicsDivision198210861086-1102．5．J．19833311-27．6．J．200425548-54．7．J．199449146-54．8WILLIAMSONCHKGOVARDHANR．Vortex-inducedvibrationsJ．AnnualReviewofFluidMechanics2004361413-455．9LIEHKAASENKE．Modalanalysisofmeasurementsfromalarge-scaleVIVmodeltestofariserinlinearlyshearedflowJ．JournalofFluidsandStructures2006224557-575．10GB50009—2001S．2006．2006．11．M．2008．12SARPKAYAT．Acriticalreviewoftheintrinsicnatureofvortex-inducedvibrationsJ．JournalofFluidsandStructures2004194389-447．69