k型节点平面管桁架结构力学性能研究

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1、万方数据ABSTRACTAsanimportantpartofthestructure，jointsdirectlyaffectthemechanicalperformanceofthestructure，suchasaffectingthesafetyanduseofthestructure．Itisspecificallyshowedthatthedeformationofthestructure，internalforceofthemembersandjointsarechanged，therefore，theresearchonmechanicalperformanceofth

2、ejointsisparticularlyimportant．Differentfactors(namelychordmemberdiameterD，chordmemberwallthicknessT，bracingmemberdiameterd，bracingmemberwallthicknesst，theangle0betweenchordmemberandbracingmember)inuni—planarK-jointsarestudiedinthethesis，whichinfluencethemechanicalperformanceofthejoints．Byusingn

3、umericalfittingmethod，thejointstiffnessformulaisobtained．PlanetrusscalculationprogramisobtainedbyusingFORTRANlanguage，basedontheBeam—Columntheory．ItisshowedthatmechanicalperformanceoftheK-jointaffectsthemechanicalperformanceofplanetrussbyusingobtainedprogramandsoftwareSAP2000tocomparativelyanaly

4、zethestructure．Thefollowingworkisdoneinthisthesis：(1)Finiteelementanalysismodelofuni—planartubularKqointisestablishedbyusingthefiniteelementsoftwareANSYS．Whenthejointsareappliedtheforceandmomentto，rotationaldeformationwillchangewiththedifferentchordmemberdiameterD，chordmemberwallthicknessZbracin

5、gmemberdiameter吐bracingmemberwallthicknessf，theangle0betweenchordmemberandbracingmember．Thestiffnessformulaofuni—planartubularKqointisobtainedwithalargenumberofnumericalfittingtothecalculationresults．(2)Threeforeignclassificationsystemsoftherigidconnections，semi-rigidconnectionsandhingedconnecti

6、onsareintroducedinthethesis．Byanalyzingtheuni-planarK-joints，anewclassificationsystemwhichisonlysuitabletouni—planartubularK-jointiscreatedbasedonEC3classificationsystem(3)BasedonBeam-columntheory，thecalculationprogramiscompiledwhichissuitabletocalculatetheplanetruss．(4)ItmakesAnalysisonthetwoca

7、lculationexamplesofplanetruss．ThejointsoftheformeronearesuitabletohingedjointsandthejointstiffnessmustbeII万方数据consideredinthelastoneaccordingtoCodeforDesignofSteelStructure．Byanalyzingthetwoexamples，theresultsshow：theprogram