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基于逐步回归分析的钢筋性能影响因素分析.docx

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基于逐步回归分析的钢筋性能影响因素分析 Abstract Thepurposeofthisstudyistoidentifythefactorsaffectingtheperformanceofsteelbarsusingstepwiseregressionanalysis.Atotalof50steelbarsweretestedfortheirtensilestrength,yieldstrength,andelongationatfracture.Thedatawereanalyzedusingstepwiseregressionanalysistoidentifythefactorsthatsignificantlyaffecttheperformanceofsteelbars.Theresultshowedthatthechemicalcompositionofsteel,productionprocess,andheattreatmentsignificantlyaffectthemechanicalpropertiesofsteel.Thefindingsofthisstudyprovideusefulinformationforimprovingtheperformanceofsteelbarsinconstructionapplications. Introduction Steelbarsarecommonlyusedconstructionmaterialsforreinforcedconcretestructuresduetotheirhighstrengthandductility.However,thequalityofsteelbarscanvarysignificantlydependingonvariousfactorssuchaschemicalcomposition,productionprocess,andheattreatment.Themechanicalpropertiesofsteelbars,suchastensilestrength,yieldstrength,andelongationatfracture,areimportantindicatorsoftheirqualityandperformanceinconstructionapplications.Therefore,itisessentialtoidentifythefactorsthataffecttheperformanceofsteelbarstoensuretheirqualityandsafetyinconstruction. Inthisstudy,weusedstepwiseregressionanalysistoidentifythefactorsthatsignificantlyaffecttheperformanceofsteelbars.Atotalof50steelbarsweretestedfortheirtensilestrength,yieldstrength,andelongationatfracture.Thedatawerethenanalyzedusingstepwiseregressionanalysistoidentifythefactorsthathaveasignificantimpactonthemechanicalpropertiesofsteelbars. Materialsandmethods Materials Fiftysteelbarswereselectedforthisstudy,whichweremanufacturedbydifferentcompaniesandhaddifferentchemicalcompositions,productionprocesses,andheattreatments.Thechemicalcompositionsofthesteelbarsweredeterminedusinganopticalemissionspectrometer.Theproductionprocessesandheattreatmentswereprovidedbythemanufacturers. Methods TensiletestingwasperformedonthesteelbarsfollowingtheASTME8standard.Thetensilestrength,yieldstrength,andelongationatfracturewererecordedforeachsteelbar. Stepwisereg