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1、AbstractConcreteFilledSteelTubularisastructureformofthesteel-concretecompositestructure,whichisastructureformedbythesteeltubefilledwithconcrete.Inrecentdecades,thesteelpipeconcretestructurehasbeenwidelyappliedtoindustrialandcivilbuildings,especiallywidelyapplica
2、tedinhigh-risebuildingsandthehighwayBridges,inordertoadapttothedevelopmentofthetimesandtheneedsofsociety,itisveryimportantsignificancetoresearchontheconcretewhichfilledwiththesteeltube.Applicationoftheprincipleofelasticityofthetheoreticalanalysisofthemechanicalp
3、ropertiesofthesteelpipeofconcretecolumn,especiallyCFSTcolumnsstressanddisplacementdeducedCFSTcolumnsunderaxialcompressionandsteelpipeconfiningforceradialdisplacementandtherelationshipbetweentheradialdisplacementandthesizeofthecross-sectionandtheload;Theoreticala
4、nalysisinthecarryingcapacityofthesteelpipeofconcretecolumn,andalsowiththesteelratioundertheconditionoflimitedbearingcapacityofconcretefilledsteeltubularcolumnandreinforcedconcretecolumninstancecomparison.UsingANSYSanalysissoftwaretoanalysisforsteelpipeofconcrete
5、columnwithnonlinearfiniteelement,fromthepointofviewoftheANSYStestthemechanicalpropertiesofthesteelpipeconcretecontent,includingtheestablishmentofthefiniteelementmodel,theproblemimposedconstraintsandload,convergencecriteriasetsolvingandfinalextract,andtheanalyzes
6、tepsandsoon.InordertocomparisonwiththeCFSTcolumnperformance,anddoANSYSnonlinearfiniteelementanalysisonthesamecross-sectionandthesameamountofsteelreinforcedconcretecolumns.WecangettheANSYSanalysisresultsofconcretefilledsteeltubularcolumnandreinforcedconcretecolum
7、nbyusingtheANSYSanalysistestwith6gropes.Usingtheconvenient,fast,andpowerfulMATLABlanguageoptimizeddesignprogramtooptimizethedesignstudyofCFSTcolumn.Inthemostpracticalstructuraldesignandcomponentanalysis,oftenjustuseoftheengineeringmechanicstoanalyzetheperformanc
8、eofthestructure,ignoringtheoptimaldesignofthestructure.PaperdoesnotonlytheCFSTcolumnmechanicalanalysis,butalsotheoptimizeddesign.Thispaper’soptimizationalgorithmisaco
