斜拉索雨振及其制振措施研究.pdf

1、西南交通大學碩士學位論文斜拉索雨振及其制振措施研究姓名：林偉達申請學位級別：碩士專業(yè)：橋梁與隧道工程指導教師：廖海黎20080301西南交通大學碩士研究生學位論文第1II頁AbstractThestaycablesaremainstressedonesofstructureofcable—stayedbridgesStaycablesalepronetosufferfromvariousofvibrations，whichareespe

2、ciallyharmfultothebridge，duetotheirsmallrigiditysmallmassandlowdampingWiththeincreaseofthespanlengthofcable吼ayedbridges，staycablesbecomelongerandlongerandtheproblemsofstaycablesvibrationshavearosegreatcoHC／￡nlinrecentyea

3、rsInthesec翹；es，rainwindinducedvibrationofstaycableshasbecomeamatterofgreatconcernofbridgeexpertsforitslargeamplitudeandlowwindspeedforvibratingThisthesisfocusesonrainwindinducedvibrationofstaycablesatacertainpositionTher

4、ain。windinducedvibrationofstaycablesisanewphenomenonofwindinducedvibration，whichWasoriginallydiscoveredin1980’SCurrentlythegenerationmechanismsofrainwindinducedvibrationhavenotyettobereachedThisthesisdeeplyanalyzessomeex

5、istinggenerationmechanismsandilluminatesthetheorybasis，advantagesanddisadvantagesofsomepossiblegenerationmechanismsInthemeantime，thethesissetforthrainwindinducedvibration’Scharacteristicsandextemalinfluencefactorsconcise

6、lyByreproducingtherainconditioninawindtunnel，thesectionmodelswhichareappliedinwindtunnelhavethreekindsofstrandedsteelwirecablewithdifferentdiameters(235mm，260ram，280ram)andonekindofparallelsteelwirecable(139mm)thatwillbe

7、usedbyEDongYangtzeRiveRoadBridgeTheeffectsofseveralmainfactorssuchaswindspeedandwindangleonthecharacteristicsofrainwindvibrationandspiraledwirescountermeasureformitigationofthevibrationarethenexperimentallyinvestigatedin