復雜截面鋼筋混凝土框架結構的非線性分析研究.pdf

1、◎固胳五嗲博士學位論文Y785576復雜截面鋼筋混凝土框架結構的非線性分析研究博士生鄒墅導師圍堡遢熬攫副導帥昱隧塹副嬰塞量申請學位級別王堂熊專業(yè)名稱緒擅王猩學位授予單位和日期同濟大學土木工程學院結構工程與防災研究所2004年5月蚓濟大學申請博士學位論文摘要AbstractAspecialflexibilitybasedmethodisusedfornonlinearanalysisofR／CframesTwo3storysinglesp

2、anR／CframesaretestedundercyclicloadingreversalsSeveralunconventionaIlyshapedframestructures，withsuchasrectangularcolumnsorspecial—shapedcolumns，arestudiedwithastandalonenonlinearanalysisprogramTakingadvantageofthesimplic

3、ityofflexibilitymethodforimplicatingelementloads。aprestressedR／CflameisalsoanalyzedNonlinearanalysisisanimportantmethodforstudyingtheseismicbehaviorsofstructuresItsdifficultiesliein：(1)elementmodels，includingmaterialstre

4、ss—strainrelations，hystereticmodelsandshapefunctions(2)solvingproceduresfornonlinearequationsReasonableandsimplemodelsandsolvingmethodsarethepremisesofnonlinearanalysisStartingwiththeshortageofstiffnessmethod，themeritsof

5、flexibilitymethodbasedonforceshapefunctionsareclearlypresented，anditsdetailproceduresareelaboratedonFlexibilitymethodusesforceshapefunctionstorelatetheelementnodalandinternalforcesNumericalintegrationscomposesectionflexi

6、bilitymatrixesintoelementflexibilitymatrixes，elementstiffnessmatrixescanthusbeacquiredFiberelementmodelisadoptedheretogethystereticpropertiesofelementsanddistributionofstiffnessalongelementsNewtonRaphsonmethodsareused，as

7、usual，fursolvingnonlinearequations，andArelengthmethodsarealsousedduringlaterstageTheexcellancesofflexibilitymethodare：1，itsforceshapefunctionssatisfyequilibriumatalltimeSmallamountofelementscanmeettherequirementforexhibi

8、tingenoughnonlineartraits2，softeningofsinglesectionorelementwillnotbringdifficultiestonumericalcalculations3，elementloadsareeasilyincludedWhileitsdisadvantagesare：1theelementstatedeterminationismuchmorecomplexthansti確ass

9、method2，nmaterialconstitutivemodels，stressisafunctionofstrainSectionflexibilitymatrixescanonlybeacquiredbyinversingsectionstiffnessmatrixesAlso，elementstiffnessmatrixesareacquiredbyinversingelementflexibilitymatrixesTwof

10、rameswithrectangularcolumns，4frameswithspecial—shapedcolumns(Lsectionforside—columnsand——sectionformidcolumns)，apres訂essedR／Cframeand3spaceframesarecalculatedbytheprogramEnvelopcurvesandhystemticcurvesarecomparedwiththet

11、estresultsEnvelopcurvesarealmostthesame，buthystereticCurvesdifferfromthetestresultsfornottakingtheslippageandshearsintoconsiderationArc—lengthmethods，inmaterialnonlinearanalysis，especiallyforcyclicIoadings，dependcloselyu

12、ponthesteplength，andinclinetodivergenceThepre。processingandpostsprocessingarepresentedPreprocessingfacilitatesthedatainput，andreduceserrorsPostprecessingusesrealtimedrawingstoshowforcedisplacementimages，whichgivesadirect