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BRB用于装配式斜支撑节点钢框架结构减震研究.docx

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BRB用于装配式斜支撑节点钢框架结构减震研究 Abstract ThispaperinvestigatestheuseofBRB(BucklingRestrainedBrace)inprefabricateddiagonalbracingnodesteelframestructurestoimproveearthquakeresistance.TheresearchexploresthemechanicalpropertiesofBRBsandcomparesthemwithtraditionaldiagonalbraces.Bothnumericalsimulationandexperimentaltestsareconductedtoanalyzetheseismicperformanceanddamagecharacteristicsofthetwoformsofdiagonalbraces.TheresultsshowthatBRBshaveexcellentenergydissipationcapabilityandyieldgreatdeformationcapacity,makingthemidealforimprovingtheseismicperformanceofprefabricatedsteelframestructuresatalimitedcost. Keywords:BRB,diagonalbracing,steelframestructure,prefabricated,earthquakeresistance. Introduction Prefabricatedconstructiontechnologyhasbeengainingpopularityinrecentyearsasitpromoteshighefficiency,low-cost,andstandardizedbuildingmaterials.Steelisacommonmaterialusedintypeofconstructionbecauseofitslightweight,strength,andabilitytobewelded.However,duetoitslowductility,steelstructuresarevulnerabletoearthquakes,whichcancausesignificantdamagetotheconstructionandpotentialharmtotheoccupants.Oneofthecriticalelementsinseismic-resistantsteelstructuresisdiagonalbracingsinceitcanreducethedeformationandcontrolthedynamicresponseofthestructuralsystems.BucklingRestrainedBrace(BRB)isatypeofdiagonalbracingthathasbeenwidelyusedinrecentyearsduetoitsexcellentseismicperformance.ThispaperaimstoexploretheeffectivenessofusingBRBsinprefabricateddiagonalbracingnodesteelframestructurestoenhanceearthquakeresistance. LiteratureReview BRBshavebeenwidelyusedinsteelstructurestowithstandearthquakessincetheycanprovidestableenergydissipationduringseismicevents.ExperimentalstudiesconductedbyFurukawaetal.(2011)indicatedthatBRBscaneffectivelyreducethedeformationofstructures,haveexcellentenergydissipationcapabilitiesandhighductility.ThemechanicalpropertiesofBRBsareduetotheirrestrainedbucklingmechanism,whichenhancestheoverallstrengthofthestructure. Ontheotherhand,traditionaldiagonalbracesarecommonlyusedduetotheirsimplei