弱軸T型鋼半剛性連接節(jié)點(diǎn)極限承載力及抗彎剛度研究.pdf

1、湖南大學(xué)碩士學(xué)位論文弱軸T型鋼半剛性連接節(jié)點(diǎn)極限承載力及抗彎剛度研究姓名：蕭超雄申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：舒興平20090511AbstractInthetraditionalanalysisanddesignofsteelframestructureitwasgenerallycarriedoutundertheassumptionsasfollowsTheconnectionsofbeamandcolumnwereo

2、ftenassumedascompletelyrigidorideallyhingedInfact，thestiffnessofactualconnectionsconfirmedbyobservationsandexperimentsaremostlybetweenthetwoextremeconditions，completelyrigidandideallyhingedSemirigidconnectionshaveaconsid

3、erableimpactontheinternalforce，displacementandultimatebearingcapacityofthestructureT—stubconnections，asatypicalsemirigidjoint，havevariousadvantagessuchasconvenientconstructionandhighindustrializationandgoodductilityInthi

4、spaper，itpresentsminoraxisTstubsemirigidconnectionsandanalvzestheultimatebearingcapacityofvariouscomponents，thenmakesacomparisonOntheultimatebearingcapacitybetweenthemandselectstheminimumvalueastheultimatebearingcapacity

5、ofthenode，atlastasetofmodelsarecalculatedusingthederivedformulaOnthisbasis，thepaperanalysestheinitialrotationalstiffnessofthenodeandderivestheinitialrotationalstiffnessformula，thencompilesaformtocalculateasetofmodels，and

6、theresultshowsthatthiskindofnodesarerelativelysemirigidconnectionsAtthesametime，thepaperusesnonlinearfiniteelementprogramANSYStostudytheultimatebearingcapacityandconnectionstiffnesswithvariousparametersTheresultsareshowe

7、dasfollowsThemostlyimportantfactorSontheultimatebearingcapacityandtherotationalstiffnessoftheconnectionsarethecrosssectionheightofcolumnsandbeamsWhenthecolumnwebthicknessis1essthanTstubbeamflangethickness，thecolumnwebwil

8、lyieldsatfirstundernormalcircumstancesButwhenthecolumnwebthicknessislargerthanTstubbeamflangethickness，theTstubbeamflangewillyieldsatfirst，andatthistimethedeformationofcolumnwebandcolumnflangearebothquitesmallThenodecapa

9、cityandrotationalstiffnessincreasewiththelengthofTstubincreasingandreduceswiththewidthofTstubincreasingButtheeffectsofthewidthofcolumnflangethicknesSofTstubbeamwebanddiameterofhigh—strengthboltsonthemomentcapacityandrota