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【英文标准名称】:StandardTestMethodforStructuralPerformanceofExteriorWindows,Doors,SkylightsandCurtainWallsbyUniformStaticAirPressureDifference
【原文标准名称】:用统一静态气压差法测定外窗、幕墙和门结构性能的试验方法
【标准号】:ASTME330-2002(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E06.51
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:curtainwall;deflection;deformation;distress;door;load;pressurechamber;specimen;support;window;Windows/windowassemblies;Airpressuretesting--buildingconstructions/materials;Curtainwalls;Doors/doorassemblies;Exteriordoors;Exteriorwin
【摘要】:Thistestmethodisastandardprocedurefordeterminingstructuralperformanceunderuniformstaticairpressuredifference.Thistypicallyisintendedtorepresenttheeffectsofawindloadonexteriorbuildingsurfaceelements.Theactualloadingonbuildingsurfacesisquitecomplex,varyingwithwinddirection,time,heightaboveground,buildingshape,terrain,surroundingstructures,andotherfactors.Theresistanceofmanywindows,curtainwalls,anddoorassembliestowindloadingisalsocomplexanddependsonthecompletehistoryofload,magnitude,duration,andrepetition.ThesefactorsarediscussedinASCE7andintheliterature(1-8).DesignwindvelocitiesareselectedforparticulargeographiclocationsandprobabilitiesofoccurrencebasedondatafromwindvelocitymapssuchasareprovidedinASCE7.Thesewindvelocitiesaretranslatedintouniformstaticairpressuredifferencesanddurationsactinginwardandoutward.Complexitiesofwindpressures,asrelatedtobuildingdesign,windintensityversusduration,frequencyofoccurrence,andotherfactorsmustbeconsidered.Superimposedonsustainedwindsaregustingwindswhich,forshortperiodsoftimefromafractionofasecondtoafewseconds,arecapableofmovingatconsiderablyhighervelocitiesthanthesustainedwinds.TheanalyticalproceduresinASCE7,windtunnelstudies,computersimulations,andmodelanalysesarehelpfulindeterminingtheappropriatedesignwindloadsonexteriorsurfaceelementsofbuildings.Generally,windloaddurationsobtainedfromASCE7are2to10sandaredependentuponthespecifictimereferenceemployedindeterminingthepressurecoefficients.Somematerialshavestrengthordeflectioncharacteristicsthataretimedependent.Therefore,thedurationoftheappliedtestloadmayhaveasignificantimpactontheperformanceofmaterialsusedinthetestspecimen.Themostcommonexamplesofmaterialswithtime-dependentresponsecharacteristicsthatareusedareglass,plastics,andcompositesthatemployplastics.Forthisreason,thestrengthofanassemblyistestedfortheactualtimedurationtowhichitwouldbeexposedtoasustainedoragustload,orboth,asdiscussedabove.Generally,U.S.practiceforwindloadtestinghasbeentorequireaminimumtestperiodof10sfortestloadsequaltothedesignwindloadandproofloadsequalto1.5timesthedesignwindload.Thusasafetyfactorisincorporatedinthetesting.WithtestloadsforwindhigherthanthosedeterminedbyASCE7oroflongertimedurationthan10s,thedesignermustconsiderwhatsafetyfactorsareappropriate.Fortestloadsthatrepresentdesignloadsotherthanwind,suchassnowload,considerationshallbegiventoestablishanappropriatetestperiodforbothdesignandproofloadtesting.Thisstandardisnotintendedtoaccountfortheeffectofwindbornedebrisorcyclicloads.ConsiderationofcyclicairpressuredifferentialsisaddressedinTestMethodE1233.ConsiderationofwindbornedebrisincombinationwithcyclicairpressuredifferentialrepresentingextremewindeventsisaddressedinTestMethodE1886andSpecificationE1996.Thistestmethodisnotintendedforuseinevaluatingthestructuraladequacyofglassforaparticularapplication.Whenthestructuralperformanceofglassistobeevaluated,theproceduredescribedinTestMethodE997orE998shallbeused.