国家体育场屋盖结构风荷载特性

《国家体育场屋盖结构风荷载特性》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、北京交通大学硕士学位论文国家体育场屋盖结构风荷载特性姓名：付以贤申请学位级别：硕士专业：结构工程指导教师：田玉基20071201缱暨圣避ABSTRACTABSTRACT：Asallinnovativestyleofstructure，largespanroofsdiffersignificantlyfromconventionalbuildings，especiallyintheconsiderationofwindloadingduringdesign．Thedecisionofwindloadsactingolllargespanroofsisusuallythekey

2、andchallengingproblemforthiskindofstructure．Thecomplexityofwindloadingactingonlongspanroofsarisesfromthevarietyofthebuildingshapes，therandomnessoffluctuatingwindpressureandthetime／spaceandspatialeorrdationofwindpressurefluctuations．Combining、撕ththesefactors．thestatisticscharacteristicsofwi

3、ndpressureisnotonlyrelatedtothecharacteristicsofoncomingflow,bmalsomostlytothesignatureturbulencewhichinducedbythebuildingitsel￡Therefore,theredoesnotexistamaturemethodtodescribethegustloadingonroofsyet．BasedOnabovethinking,studiesonthecharacteristicsofwindloadingonroofshavebeencarriedouti

4、ntimedomainandfrequencydomainrespectively,andaanalyticalmethodofpeakvalueofwindpressureisproposed，byusingwindtunneltestsresult．Themaincontentsinthispaperareshownasfollowing：(1)WindtunneltestofNationalStadiumisintroduced．BasedONtestresult，thecharacteristicofmeKnandfluctuatingfeaturesofwindp

5、ressuresonroofsisalsoinvestigated．Andthecharacteristicofwindpressuresdistributionisdiscussedinsignatureturbulence，(2)Thecharacteristicsoffluctuatingwindpressuresintimedomainiscarriedout．Themethodofchi-squaretestforgoodnessoffitisproposedtostudythecharacterizenou-Gaussianfeatureofwindpressu

6、res．SpatialcorrelationsofwindpressureondifferentroofsandtheSalTleroofarestudied，andtheeffortofcorrelationsonfluctuatingvalueofwindpressuresisanalyzed．(3)Thestatisticaltheoryofextremeisstudied，twodifferentmethodisproposedtodefiuitefactorofpeakvalueinnon-Gaussien碍季onandnon-Gaussianre,on．Andt

7、hedistributi∞offactorofpeakvalueandextremevalueofwindpressuresisalsoinvestigated．(4)Thecharacteristicsoffluctuatingwindpressuresinfrequencydomainiscardedout．Combiningwi也vort髓underdiffereatwinddirections,thecharacteristicsofwindpressurespectraindifferentpositio