鋼結(jié)構(gòu) 英文課件

SteelConstruction3components1)AdvancedPlanningDivisioning–dividingstructureintounitsusedtoschedulefabricationanddeliveryDeterminedbyorderinwhichstructureiserectedJointeffortbetweenfabricatoranderectionmanagerMustchecksizeandweightofmembersagainstplantcapacity,transportationsize,wtlimits,erectionequipmentcapacity3components2)FabricationShopdrawings,steeltype,builtuporrolledsection,connectionmethod,camber3)DeliveryFieldOperationsReceivingandunloadingSorting–shakeout–idmemberswithcodeBysizeorbyplacementonstructureWantallmaterialforaunitinoneplaceInspectingWelds,rust,warpedortorquedStoring–storeoffground,protectfromdirt,grease,corrosionLargemembersstoredontruckuntilerectionNeedalargeenoughstorageareaYarding–storinginatempareaandthenmovingtoerectionareaErectingFieldOperationsMustbecarefulunloadingsteelCandamagesurfacecoating,bendortorquemembersUsedoubleslingstoavoidbendingmembersMustinspectfordamageandconformancetoshopdrawingsandtolerancesT14-1StructuralSteelTypesofSteelA36carbonstructuralsteel–mostcommonA572HighStrength–LowAlloyStructuralSteelA588CorrosionresistantHighStrength–LowAlloyStructuralSteelWeatheringsteel–developsprotectivecoating–nopaintingrequiredStructuralSteelCamberandsweepCamber–lookslikefrownallowsforbeamtoreturntolevelpositiononceloadisappliedSweep–curveinbeamStructuralSteelStandardRolledShapesF14-2,T14-2BuiltupmembersF14-3UsedwhencommonrolledshapeisnotavailableOpenwebjoistsandjoistgirders,F14-5&6Lightweight,strongUsedextensivelyonroofsandfloorsCastellatedbeams–F14-7

ErectionUsualprocessusesthreecrewsRaisingcrew–liftsmemberintopositionandtempboltsitintoposition(safely)OSHAregs–structuralintegrity–abilityofstructuretosafelystandduringerectionSafetyregs-erectionfloorcannotbemorethan8floorsabovehighestcompletedpermanentfloor,Notmorethan4floorsofunfinishedconnectionsabovehighestpermanentlysecuredfloorFittingcrew–bringsmemberintoproperalignmentandtightensenoughboltstoholditinplaceFasteningcrew–finalconnectionsLiftingEquipmentCranes,towercranesSmalljobsmayseeF14-9(oldstuff)AlignmentofSteelWithintolerancesofAISCCodeofStandardofPracticeVerticalorplumberror+/-1unitin500unitsofheightOutsidecolumnscannotbemorethan1”towardsor2”awayfrombuildinglinein20storiesMinimumclearancebetweenmembersCopingorblocking–notchingbeamstoprovideclearancewhenconnectingbeamstocolumnsElectricalandplumbingnotchesneedtobedesignedAlignmentofSteelGuysCablesusedtoalignmembersDonotoverstressErectionofSteelJoistsRequirelateralbracingCannotreleasejoistfromcraneuntilbracedFieldConnectionsFasteningsystemsBoltingTwotypesofboltsystemsInterference-bodyorinterference-fitboltsOversizedboltdrivenintohole–holdsboltinplacewhiletightenedTensionControlortensionsetboltsBoltstembreakswhenspecifiedtorquehitInbothcasesneedtomakesurethatboltsaretightenedtospecifiedtorqueF14-11,14-12Riveting–notusedmuchtodayFieldConnectionsFasteningsystemsWeldingAllweldersshouldbecertifiedbyAmericanWeldingSocietyF14-14standardweldingsymbolsWeldsmustbetested&inspectedforqualityVisual–quickestmustbehighlytrainedDestructive–usedwhenquestionablequalityradiographic,ultrasonicprovideimageofweldmagneticparticle,liquidpenetrantinspection-showflawsSafetyHardhats,glovesEyeprotectionforwel