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火灾后圆钢管约束钢筋再生混凝土轴压短柱力学性能分析.docx

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火灾后圆钢管约束钢筋再生混凝土轴压短柱力学性能分析 Title:AnalysisofMechanicalPropertiesofSteelReinforcedRecycledConcreteShortColumnsConstrainedbyCircularSteelTubesafterFire Abstract: Theaimofthisstudyistoanalyzethemechanicalpropertiesofsteelreinforcedrecycledconcreteshortcolumnsunderaxialcompression,whichareconstrainedbycircularsteeltubesafterafireincident.Theincreasinguseofrecycledconcreteinconstructionhasledtoagrowinginterestinunderstandingitsperformanceunderdifferentloadingconditions,especiallyafterexposuretofire.Theapplicationofcircularsteeltubesasaconfinementmethodforrecycledconcretecolumnshasshownpromisingresultsinenhancingtheirstrengthandductility.Thispaperpresentsacomprehensiveanalysisofthemechanicalbehaviorofsteelreinforcedrecycledconcreteshortcolumnsunderaxialcompression,consideringtheeffectsoffiredamage. 1.Introduction: 1.1Background 1.2SignificanceoftheStudy 1.3Objectives 2.LiteratureReview: 2.1PropertiesofRecycledConcrete 2.2ConfinementTechniquesforConcreteColumns 2.3MechanicalBehaviorofFire-DamagedConcrete 3.ExperimentalMethodology: 3.1MaterialsandTestSpecimens 3.2TestSetupandProcedure 3.3VariablesandMeasurements 3.4DataAnalysisTechniques 4.ResultsandDiscussion: 4.1FireDamageEffectsonConcreteProperties 4.2InfluenceofCircularSteelTubesonAxialLoadCapacity 4.3DuctilityandEnergyAbsorptionCapacities 4.4FailureModesandCrackPatterns 5.ComparisonwithDesignGuidelines: 5.1CodeProvisionsforConfinementReinforcement 5.2ApplicabilityofExistingDesignModelstoSteelReinforcedRecycledConcreteShortColumns 6.Conclusions: 6.1SummaryofFindings 6.2ImplicationsforDesignandConstructionPractice 6.3RecommendationsforFurtherResearch 7.References Thispaperaimstoprovideacomprehensiveanalysisofthemechanicalpropertiesofsteelreinforcedrecycledconcreteshortcolumnswhenconstrainedbycircularsteeltubesafterafire.Thestudywillinvolveexperimentaltesting,dataanalysis,andcomparisonwithexistingdesignguidelines.Thisresearchcontributestoexpandingtheunderstandingofthemechanicalbehaviorofrecycledconcreteunderfireconditionsan