钢结构ISO标准术语精选Word文档格式.docx

钢结构ISO标准术语精选Word文档格式.docx

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Astructuralmemberdesignedtotransferaaxialtensionorcompressionloadonly.

BallastRoof

Aroofwhichhasselectedmaterial,suchascrushedstone,placedonitssurfacetoholddowntherooffromwindforces.

BasePly

Isonelayeroffeltfastenedtothedeckoverwhichabuilt-uproofisapplied.

Basement

Anyfloorbelowthefirststoryinabuilding.

Batten

Asmallpieceofangleorplateweldedtotheheelsofatwoanglewebmemberoranytwoparallelcomponentstotiethemtogetherandusuallylocatedatthemiddleofthemember.

Bay

Thedistancebetweenthemainframesofabuilding.

BearingWall

Awallwhichissupportinganyverticalloadsi2nadditiontoitsownweight.

BevelCut

Asinglecutmadeatanangletothememberlength.SeeMiterCut.

BG-TypeJoistGirder

AtypeofJoistGirderwherejoistsarelocatedatallpanelpointswhereverticalwebsanddiagonalwebsintersectthetopchord.

Bifurcation

Thephenomenonwherebyaperfectlystraightmembermayeitherassumeadeflectedposition,deflectthentwistoutofplane,ormayremaininanundeflectedfiguration.

BOCA（BuildingOfficialsandCodeAdministratorsInternational,Inc.）

Aminimummodelregulatorycodefortheprotectionofpublichealth,safety,welfareandpropertybyregulatingandtrollingthedesign,struction,qualityofmaterials,use,occupancy,locationandmaintenanceofallbuildingsandstructureswithinajurisdiction.ItsservesprimarilytheNorthCentralandNortheastUnitedStates.

BottomBearing

Abearingditionwherethejoistorjoistgirderbearsonitsbottomchordandnotatanunderslungdition.

BottomChordExtension（BCX）

Thetwoangleextendedpartofajoistbottomchordfromthefirstbottomchordpanelpointtowardstheendofthejoist.

BowStringJoist

Anon-standardtypeofjoistwherethetopchordiscurvedandthebottomchordisstraightorlevel.

Bracket

Astructuralsupportattachedtoacolumnorwallonwhichtofastenanotherstructuralmember.

BridgeCrane

Aliftingsystemwhichhasahoistthatmoveslaterallyonabeamorothermemberwhichtheninturnmoveslongitudinallyonarunwaymadeofbeamsandrails.

BridgingAnchor

Anangleorbentplateattachedtoawallwherethebridgingwillbeattachedoranchored,eitherbyweldingorbolting.Theendsofallbridginglinesterminatingatwallsorbeamsshallbeanchoredthereto.

BridgingClip

Asmallpieceofangleorplatewithaholeorslotthatisweldedtothetopandbottomchordanglessothatbridgingmaybeattached.

BridgingDiagram

Adiagramoftheprofileofajoistusedtoshowthenumberandlocationoftherowsofbridging.

Built-UpRoof

Atypeofroofcomposedoftwoormorelayersofalternatingfelt,tarandasphalt.

Built-UpSection

Astructuralmembermadeupfromindividualflatplatesweldedtogetheroranystructuralmetalelementsthatareweldedorboltedtogether.

Camber

Camberisanupwardcurvatureofthechordsofajoistorjoistgirderinducedduringshopfabricationtocompensatefordeflectionduetoloadingditions.Note,thisisinadditiontothepitchofthetopchord.

Canopy

Aprojectingmemberthatissupportedatoneendonly.

CantedSeat

Aseatwhichisslopedperpendiculartothememberwhichmostjoistmanufacturesdonotdo.Usuallythesteeltractorfurnishesabentplateshimtoprovidelevelbearingfortheseat.

Catwalk

Suspendedstructuralframingusedtoprovideaccesstoandbetweenareasbelowaroofandaboveafloor.

CeilingExtension

Issimilartoabottomchordextensionexceptthatonlyoneangleofthejoistbottomchordisextendedfromthefirstbottomchordpanelpointtowardstheendofthejoist.

CenterlineSpan（orCenter-to-Center）

Atheoreticalspandefinitionwhichisthedistancebetweentheactualcenterlinesofabeam,column,joist,orjoistgirder.

Centroid

Thepointinamemberattheintersectionoftwoperpendicularaxessolocatedthatthemomentsoftheareasonoppositesidesofanaxisaboutthataxisiszero.

Channel

Ahotrolledstructuralshapethelookslike"

["

.ThereareAmericanStandardChannelsdesignatedby（C）andMiscellaneousChannelsdesignatedby（MC）.

Cladding

Theexteriorcoveringofthestructuralmembersofabuilding.

Clevis

AU-shapedyokewithinternalthreadsinoneendwhichcanbeattachedtoathreadedrodandtheotherendanectionwithaholeusedforapinorboltattchment.

ClosureStrip

Afloordeckaccessorymadeofgagemetalwhichisplacedovertheendsofdecksothatcretecannotrunoutoftheflutesofthedeck.

Coefficientof（Linear）Expansion

Thechangeinlength,perunit,forachangeofonedegreeoftemperature.

CollateralLoad

Alladditionaldeadloadsotherthantheweightofthebuilding,suchassprinklers,pipes,ceilings,andmechanicalorelectricalcomponents.

CompactSection

Asteelsectionwhoseflangesmustbetinuouslynectedtothewebsandthewidth-thicknessratiosofitscompressionelementcannotexceedthelimitingwidth-thichnessratiosdesignatedintheAISCManual.

ventionalFraming

Framingusingventionaljoist,beams,columns,masonrywalls,etc.insteadofframingusedinMetalBuildingstruction.

Coping

Theprocessofremovingcertainsectionsofastructuralsteelmembertoalloweasierfituptothesupportingstructuralmember.

Coverage

Thewidthofadecksheet,i.e.,30inchesor36inches.

Creep

Atime-dependentdeformationofastructuralmemberunderasustainedstantload.

Cricket

Aridgeordrainagedivertingroofframing.

CrimpedAngleWeb

Aregularangelwhoseendshavebeen'

crimped'

intheshapeofa'

U'

whoseout-to-outdistanceisusuallyoneinch.Theactualcrimpedportionoftheangleisonlyafewinchesoneachendandtheendisinsertedbetweentoporbottomchordmemberstobewelded.

Curb

Araisededgeofacretefloorslaborsupportforamechanicalunit.

Curvature

Therotationperunitlengthofamemberduetobendingforces.

Cut-List

Alistofcomponentswithdimensionsusedforfabricationandaccountingpurposes.SeeBillofMaterials.

Damping

Forfloorvibrations,itistherateofdecayofamplitude.

DeckType

Thespecifictypeofdecktobespecified,suchasType"

B"

WideRib,Type"

F"

Intermediate,Type"

N"

DeepRib,Type"

A"

NarrowRib,Composite,Cellular,etc.

DepthofJoist

Theout-to-outdistancefromthetopofthetopchordtothebottomofthebottomchordtakenasomereferencelocation,usuallyatthemidspanofthejoistorjoistgirder.

DiagonalBridging

Twoanglesorotherstructuralshapesnectedfromthetopchordofonejoisttothebottomchordofthenextjoisttoforman'

X'

shapewhosel/rratiocannotexceed200.Thebridgingmembersarealmostalwaysnectedattheirpointofintersection.

DiaphragmAction

Theresistancetoarackingaffectorin-planeshearforcesofferedbyroofdeck,panels,orotherstructuralmemberswhenproperlyattachedtoastructuralframe.

DownstandingLeg

Thelegofastructuralanglewhichisprojectingdownfromyouwhenviewing.

Drift

Thelateralmovementordeflectionofastructure.

DriftIndex

Theratioofthelateraldeflectiontotheheightofthebuilding.

DriftPin

Ataperedpinusedduringtheerectionprocesstoalignholesinsteelmemberswhicharetobenectedbybolting.

Duct

Anytube,pipeorotherduitbywhichairorfluidistransfered.

DuctOpening

Theroundorsquareopeningrequiredthroughthewebsystemofajoistorjoistgirdertoallowpassageofaduct.

EdgeAngle

1）Astructuralanglethatisnectedaroundtheedgeofajoistextensionorothermember2）AnangleusedaroundthesidesofafloortotainthecretewhenitisbeingpouredwhichisalsocalledaPourStop.

EdgeStrip

Thewidthorregionaroundtheedgesofabuildingwhereupliftvaluesarehigherthanintheinterioroftheroof.

EffectiveDepth

Thedistancefromthecentroidofthetopchordtothecentroidofthebottomchord.

EffectiveLength

Theequivalentlength,KL,usedincompressionformulas.ThismethodestimatestheinteractioneffectsofthetotalframeonacompressionmemberbyusingKfactorstoequatethestrengthofaframedcompressionmemberoflengthLtoanequivalentpin-endedmemberoflengthKLsubjecttoaxialloadonly.

EffectiveLengthFactor（K）

Theratiobetweentheeffectivelengthandtheunbracedlengthofamembermeasuredbetweencenterofgravitiesofthebracingmembers.Kvaluesaregivenforseveralidealizedditionsinwhichjointrotationandtranslationarerealized.

EffectiveMomentofInertia

Themomentofinertiaofthecrosssectionofamemberthatremainselasticwhenpartialplastificationtakesplace.SeeMomentofInertia.

EffectiveWidth

Thetransversedistanceindicatingtheamountofslabthatactsinjuctionwiththesupportingmember.

Embedment

Asteelmembersuchasaplate,bolt,stud,orbarcastintoacretestructurewhichisusedtotransmitappliedloadstothecrete.

EndBay

Thebaywhichislocatedfromtheendofabuildingtothefirstinteriormainframe.

EndDiagonalorWeb

Thefirstwebmember