方鋼管混凝土構(gòu)件滯回模型的數(shù)值模擬與研究.pdf

1、同濟(jì)大學(xué)碩士學(xué)位論文方鋼管混凝土構(gòu)件滯回模型的數(shù)值模擬與研究姓名：路志浩申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：陳以一2001.7.1A《，1，‘、，／，’。。＼‘f，^ABSTRACTThereisalackofreliablehy’stereticcalculationmodelintheanalysisofconcrete‘filledsquaresteeltube(CFST)structures，whichleadstomyr

2、esearchworkInthisthesis，tressstraincurveofsteeltubeconsideringlocalbucklingandpostbucklingbehaviorfortheanalysisofCFSTmembersisputforwardand朋‘一口hystereticcurvesaresimulatedconsideringresidualstressbased011thestress—strai

3、ncurveofsteelandconcreteundercyclicloadingAlso，theinfluenceofaxialforceratio，widththicknessratioandconcretegradeOnthehystereticbehaviorisanalyzed，andtheM一妒hystereticmodelforCFSTmembersundergeneralsituationsispresentedCon

4、trollingparameterswhichdescribethe^f—ohystereticmodelaregivenbynonlinearregressionThehystereticmodelforCFSTmembersundercompressionandbendinginthisthesisCanbereferredtoforseismicanalysisofCFSTmembersTogivethestrengthparam

5、eter“ofthesimplifiedhystereticmodel，loadingcapacityofCFSTmembersisstudiedintheChapter2BasedoncriticaltheorytheformulaeforstrengthofCFSTmembersundergeneralsituationsarededucedandsimplifiedcalculationmethodwhichCanbereferr

6、edtoduringdesignproceduresisgivenThecomparisonofthetheoreticalandsimplifiedformulaewiththetestdatashowstheformulaeareaccurateandacceptableTostudyaseismicbehaviorofCFSTstructures，wemustresearchOiltheIoaddeformationbehavio

7、rofCFSTmembersaccordinglyInthisthesis，methodforcalculatingloaddeformationCurvesofCFSTcolumnsisgiven，whichperformsnumericaliterationbydividingcantilevercolumnstoseveralsegmentstoconsidersecondaryeffectusingthehystereticmo

8、delgivenbeforeThetheoreticalresultsareconsistentwiththetestdatawhichshowsthatthehystereticmodelisperfectandaccurateenoughInthisthesis。influenceparameterssuchasaxiaIforoeratioandwidth_thicknessratioontheductilityofCFSTmem

9、bersareanalyzedWeCansee，ductilityoftheCFSTmembersdecreasesrapidlywiththeincreasingofaxialforceratioandwidththicknessratioBasedontheanalysisresults，ductilityofCFSTmembersiSevaluated[Keyword]CFST，M一殘hystereticmodel，numeric