復(fù)雜截面鋼筋混凝土框架結(jié)構(gòu)的非線性分析研究.pdf

1、◎固胳五嗲博士學(xué)位論文Y785576復(fù)雜截面鋼筋混凝土框架結(jié)構(gòu)的非線性分析研究博士生鄒墅導(dǎo)師圍堡遢熬攫副導(dǎo)帥昱隧塹副嬰塞量申請(qǐng)學(xué)位級(jí)別王堂熊專業(yè)名稱緒擅王猩學(xué)位授予單位和日期同濟(jì)大學(xué)土木工程學(xué)院結(jié)構(gòu)工程與防災(zāi)研究所2004年5月蚓濟(jì)大學(xué)申請(qǐng)博士學(xué)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