上下翼緣角鋼半剛接空間鋼框架極限承載力分析與整體設(shè)計(jì).pdf

1、湖南大學(xué)碩士學(xué)位論文上下翼緣角鋼半剛接空間鋼框架極限承載力分析與整體設(shè)計(jì)姓名：湯建平申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：舒興平20070508碩士學(xué)位論文IIIAbstractMostofbeamtocolumnconnectionsinsteelframesaresemirigid.Theirbehaviliesbetweenperfectlyrigidconnectionideallypinnedconnection.Thea

2、ctualeffectsofconnectionbehavimustbeconsideredindesignofsteelframes.Aconservativeestimationmaybeprovidedinconventionaldesignmethodsusingelasticglobalanalysisthelimitstatememberdesign.Indertoovercomethedifficultiesoftheco

3、nventionalapproachsecondderelasticplasticanalysisdesignofsemirigidspatialsteelframesshouldbedirectlyperfmed.Topseatangleconnectionsareanalyzedtoobtainmechanicalbehaviunderstaticloads.Thethreeparameterpowermodelproposedby

4、KishiChenisadopted.Thepracticalproceduresfdeterminingtheinitialconnectionstiffinessultimatemomentcapacityareprovided.Theresultsshowthatthebehaviofsemirigidconnectionsisgreatlyinfluencedbytheangle’sthicknesslengthdistance

5、betweentheaxesoftheboltwhichintensionflangeofthebeamtheboltdiametertheheightofthebeam.Basedonthefinitedefmationtheyofcontinuummechanicsstressresultantyieldsurfaceplasticflowrulestiffnessmatrixesfsemirigidspatialsteelfram

6、esarederivedusingKishiChenpowermodeltodescribethenonlinearbehaviofsemirigidconnections.Ananalyticprocedureshavebeendesigned.Theexampleisgiventoshowtheeffectsoftopseatanglesemirigidconnectionstotheultimateloadcarryingcapa

7、cityofspatialsteelframes.Aoveralldesignmethodoftopseatanglesemirigidspatialsteelframeisfirstsummarizedbasedontheaboveanalysis.AcontrastaboutloadcombinationsconstraintfunctionfdesignofsteelstructurebetweenChinaUSAisgivens

8、omeconcludingremarksarethenmade.TheproposedmethodachievetheLRFDdesignrequirementswithouttediousseparatemembercapacitychecksincludingKfactcalculationscanaccountfaninelasticmomentredistributionthusmayallowsomereductionofst

9、eelweight.Theexamplealsoindicatesthatsomestabilizationproblemesshouldbenoticedfthedesignofmultistysemirigidspatialsteelframes.Keywds:topseatanglesemirigidconnectionsspatialsteelframesthesecondelasticplasticUltimateloadca