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1、橋梁建設(shè)2014年第44卷第4期(總第227期)BridgeConstruction，Vo1．44，No．4，2014(TotallyNo．227)文章編號：1003—4722(2014)04—0015—07臺風(fēng)“?？?作用下蘇通大橋抖振全過程實(shí)測研究王浩，程懷宇，李愛群，張宇峰(1．東南大學(xué)混凝土與預(yù)應(yīng)力混凝土結(jié)構(gòu)教育部重點(diǎn)實(shí)驗(yàn)室，江蘇南京210096；2．江蘇省交通科學(xué)研究院，江蘇南京210017)摘要：為給大跨度斜拉橋的抗風(fēng)設(shè)計(jì)提供參考，以蘇通長江公路大橋(主跨1088m的雙塔雙索面鋼箱梁斜拉橋)為研究對象，利用結(jié)構(gòu)健康監(jiān)測系統(tǒng)采集的臺風(fēng)“?？?/p>
2、全過程風(fēng)環(huán)境和結(jié)構(gòu)振動數(shù)據(jù)，采用頻譜分析和數(shù)理統(tǒng)計(jì)方法進(jìn)行了該橋風(fēng)致抖振響應(yīng)的實(shí)測研究。研究結(jié)果表明，該橋斜拉索和主梁的抖振加速度RMS值總體上隨風(fēng)速的增大而增大；就本次實(shí)測而言，該橋主梁和斜拉索的抖振加速度響應(yīng)在風(fēng)速大于15m／s時(shí)陡然增大，值得引起注意；與其他斜拉橋相比，該橋斜拉索在臺風(fēng)下的抖振響應(yīng)較小，驗(yàn)證了其減振措施的有效性。關(guān)鍵詞：斜拉橋；臺風(fēng)“?？?；結(jié)構(gòu)健康監(jiān)測系統(tǒng)；抖振響應(yīng)；加速度；頻譜分析；實(shí)測中圖分類號：U448．27；U441_3文獻(xiàn)標(biāo)志碼：AWhole。_ProcessMeasurementofBuffetingResponse
3、ofSutongBridgeUnderActionofTyphoonHaikuiWANGHao，CHENGHuai—yu，LJAi—qun，ZHANGYu—feng(1．KeyLaboratoryofConcreteandPrestressedConcreteStructuresofMinistryofEducation，SoutheastUniversity，Nanjing210096，China；2．JiangsuTransportationResearchInstitute，Nanjing210017，China)Abstract：Toprovi
4、dereferenceforthewindresistantdesignoflongspancable—stayedbridg—es，theSutongChangjiangRiverHighwayBridge(asteelboxgirdercable—stayedbridgewithdoublepylons，doublecableplanesandwithamainspan1088m)wastakenastheresearchob—jectandthemeasurementofthewind-inducedbuffetingresponseoftheb
5、ridgewasstudiedbythespectralanalysisandmathematicalstatisticsmethods，basedonthewindenvironmentandstruc—turalvibrationdataofthewholeprocessofTyphoonHaikuiacquiredbythestrueturalhealthmo—nitoringsystem(SHMS)ofthebridge．Theresultsofthestudydemonstratethattheroot—mean—square(RMS)val
6、uesofthebuffetingaccelerationofthemaingirderandstaycablesofthebridgeincreasewiththeincreaseofthewindspeedingenera1．Asforthemeasurementforthebridgethistime，thebuffetingaccelerationresponsesofthemaingirderandstaycablesdramaticallyin—creasewhenthewindspeedexceeds15m／s，towhichattent
7、ionshouldbepaid．Comparedtooth—ercable—stayedbridges，thebuffetingresponseofthebridgeundertheactionofthetyphoonislit—tle。rifyingthatthevibrationdampingmeasurestakenforthebridgeareeffective．Keywords：cable—stayedbridge；TyphoonHaikui；structuralhealthmonitoringsystem；buf—fetingrespons
8、e；acceleration；spectralanalysis；measurement收稿日期
