大跨度平屋面结构的风振响应和风振系数研究

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1、浙江大学博士学位论文太跨度平屋面结构的凡振响应和风抓系数计托STUDYONWIND．1NDUCEDDYNAMICRESPONSEANDWINDLoADR～CTORFORLONG—SPANFLATRoOFSTRUCTURESABSTRACTAlongwiththedevelopmentofscienceandtechnology,anumberoflong—spanflexibleroofstructureswithbeautifulshapesandnewstructuralsystemsarewidelyappl

2、iedintothepublicconstructions，f。rexample，gymnasium，hangarandtheaterWhenwindflowsaroundroofs，theairflowwillbeseparatedtoformahighsuctionzone、andtheflexibleroofswillsufferfromwind·inducedbuffetingresponseSo岛Lalimitednmnberofresearchpapersarerelatedtodynamicrespo

3、nsesoflong—spanflexibleroofsathomeandabroadSoitisimportanttostudyonwindloadandwind-induceddynamicresponseforlong—spanflexibleroofstructuresinthefieldofengineeringandresearchBasedonwindtunneltestandtheoreticalanalysis，thevibrationmechanismvibrationshape，dynamic

4、responseandwindloadfactoroflong—spanflatroof]ssubjectedtowindexcitationareanalyzedsystematicallyinthisdissertation，andsorllevaluableresultsareobtained．Inthematterofwindtunneltests，therigidandaeroelasticmodelsforlong·spanflatroofstructuresinthesecases，withorwit

5、houtparapets，closedorunclosedandopeningaholesuddenly，aredesignedThequestionthatwindpressureuppersurfaceandundersurfaceofrigidmodelscallbetestedatthesametimeandtheflexiblevinyltubesconnectedtopressuretapscan’tinfluencetheturbulenceissolvedcommendablyThemethodtO

6、simulatetheaeroelasticpropertiesofprototypenconsiderationofaseI。iesofsimilaritycoefficientsincludingFroudenumbersestablishedThroughthewindtunneltestsforrigidandaeroelasticmodels，theaerodynamicpressurecoefficientsanddynamicresponsesareobtainedfortheselong—spanf

7、latroofstructuresAndacomparativeanalysisisalsoperformedInthematteroftheoreticalanalysis，usingthelocalmeanwindpressurecoefficientsandtimehistoryoffluctuatingpressuresdeterminedinwindtunnet，timwind-induceddynamicresponsesforlong-spanfiatroofstructuresarecalculat

8、edinJI浙江大学博士学位论文大跨度平屋面结构的风撮响应和风振系数研：汽frequencydomainandtimedomainseparatelyBasedonthecomparisonofthecomputedresultsandexperimentaldates，someimportantconclusionscallbeobtainedTheres