加肋焊接空心球節(jié)點受壓承載力參數(shù)分析

1、蘭州理工大學碩士學位論文加肋焊接空心球節(jié)點受壓承載力參數(shù)分析姓名：江磊申請學位級別：碩士專業(yè)：結構工程指導教師：王秀麗王洪鎮(zhèn)20100401加勁焊接窄心球節(jié)點受壓承載力參數(shù)分析AbstractThedevelopmentoflargespatialreticulatedstructuresiscloselyrelatedtothedevelopmentofnodes，currentlyappliedinlarge—spanstructu

2、resofthenodeisthemostmatureweldedhollowsphericaljoints，boltedjointsandintersectingjoints，etcWeldedhollowsphericaljointsintheapplicationandresearchismorematureinourcountry，withtheemergenceofnewstructuresaswellasmorecomple

3、xstructuralsystemwasborn，theoldformnodeshasnolongerapplicableSoontheweldedhollowsphericaljointsstillhavesomeproblemstobefurtheraddressedcurrentlyInactualprojectsonthediameterofmorethan300weldedhollowballsneedtosetthestif

4、fener，topreventthedestructionofitsinstabilityTheaxialcompressionformulaisobtainedbyregressionanalysisofexperimentalinOurcountrypresentstandardThecalculationofstiffenedhollowspherescompressionbearingcapacityisbasedontheor

5、iginalformulamultipliedbya14foldcapacityincreasefactor，foreachnodeindiameterareusedtoimprovethebearingcapacityofasinglefactor，notconsideredtheimpactofotherparametersFortheengineeringdesignsomenodesdesigntooconservative，s

6、omenodesdesignunsafeAndontheaxialforce，stiffenersaffectonthebearingcapacityofweldedhollowballhaslessresearchedInthispapertheoreticalanalysis，finiteelementanalysis，experimentalverificationthreewaysareused，systematicstudyo

7、nstiffenersweldedhollowballsofdifferentparametersinthecaseofthestiffenersontheloadcapacitiesofthesphereNodesofeachballdiameter500，450，400，350，300caseforexampleinthispaper，buildthefiniteelementmodel，transformthedifferentp

8、arameters，suchasthespherewallthickness，pipediameter，pipewallthicknessandSOon，implementthefiniteelementanalysis，byavarietyofdifferentparametersoftheballbearingcapacity，comparedwiththestandardformulasystematicstudyofthesti

9、ffenerinthedifferentparametersonthecompressioncapacityofthesphereFinally，throughflnumberofgroupswithstiffenersweldedhollowballoffullscalemodelexperiment，verifytheaccuracyofthefiniteelementanalysisThroughthefiniteelementa

10、nalysisandexperimentalvalidationmethods，stiffenertoaxialpressureweldinghollowballjointsundertheinfluenceofthecarryingcapacitywasinvestigated，drawsomeconclusionsWeldinghollowballswithstiffenerfailuremodeisthestrengthofpip

11、e，notthespherebucklingdamageCapacityimprovementfactorisnotafixedfactor，butavarietyoffactorsandvariablesItiswithpipediameterandpipewallthicknessandotherfactors，謝ththeincreaseofpipediameterandpipewallthicknessincreases，inc