格構(gòu)式壓彎構(gòu)件平面內(nèi)穩(wěn)定分析

1、浙江大學(xué)碩士學(xué)位論文格構(gòu)式壓彎構(gòu)件平面內(nèi)穩(wěn)定分析姓名：劉書(shū)江申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：童根樹(shù)20040201塑墨塹堅(jiān)查堂塑蘭!鯊堡j衛(wèi)塑!一In—PlaneStabilityofEccentricallyLoadedBuilt—upColumnsAbstractDuetostructuraieconomybuikupmembersarewidelyusedinindustriaIsteelstructuresHoweve

2、rtheinteractionofglobalandlocalbucklingoccurredinbuilt—uDmembersanditsdetrimentaleffectontheIoadcarryingcapacityhavenotyetbeenfullydocumentedInthisthesistheinplaneinelasticstabilityoflacedcolumnsandbeamcolumnsconsistingo

3、ftwoidenticaldoubly—symmetricalIsectionsareinvestigatedFirstlythevalidityofanalyzingbuilt—upcolumnsandbeam—columnsbythegeneralFEAprogramANSYSwith血eBeaml89elementisstudiedfortheBeaml89elementcanconsidergeometricalnon1inea

4、rityandthematerialplasticityManynumericalresultsconfirmthevalidityofthemethodSecondlythelacedcolumnsinplasticphasearestudiedwiththeforegoingmetlodTheoverallandlocalinitialcurvaturesandtheresidualstressesareconsideredalso

5、thematerialplasticityisconsideredinthesolutionprocessWiththeprogram、mauymemberswithdi能rentsectionsizesandslendernessratiosareanalyzedAbetterformulacalculatingtheinplanestabilityfactorrpoflacedcolumnsisachievedbydatafitti

6、ngbasedonthestabilityofasinglebranchFinallyformulaecalculatingtheinplanestabilityofbuilt—upcolumnsundercompressionandbendinginvariouscodesforsteelstructuresarecomparedwithnumericalresults，anditisfoundthatthecurrentformul

7、aisunsafewhentheslendemessislurgeThelacedbeam—columnsworkedinelasticplasticrangearestudiedTheinitialcurvaturesandtheresidualstressareconsideredinthesolutionprocess，Wjnltheprogrammanymemberswithdifferentsectionsizesandsle