DESIGN-OF-BUILDINGS-TO-RESIST-PROGRESSIVE-COLLAPSE

UFC4-023-0314July2009IncludingChange1–27January2010UNIFIEDFACILITIESCRITERIA(UFC)DESIGNOFBUILDINGSTORESISTPROGRESSIVECOLLAPSEAPPROVEDFORPUBLICRELEASE;DISTRIBUTIONUNLIMITEDUFC4-023-0314July2009IncludingChange1–27January2010UNIFIEDFACILITIESCRITERIA(UFC)DESIGNOFBUILDINGSTORESISTPROGRESSIVECOLLAPSEAnycopyrightedmaterialincludedinthisUFCisidentifiedatitspointofuse.UseofthecopyrightedmaterialapartfromthisUFCmusthavethepermissionofthecopyrightholder.U.S.ARMYCORPSOFENGINEERSNAVALFACILITIESENGINEERINGCOMMAND(PreparingActivity)AIRFORCECIVILENGINEERSUPPORTAGENCYRecordofChanges(changesareindicatedby\1\.../1/)ChangeNo.DateLocation1ChangedallreferencesfromUFC3-310-01StructuralLoadDatatoUFC3-301-01StructuralEngineering27January2010ThisUFCsupersedesUFC4-023-03,dated25January,2005.UFC4-023-031February2009FOREWORDTheUnifiedFacilitiesCriteria(UFC)systemisprescribedbyMIL-STD3007andprovidesplanning,design,construction,sustainment,restoration,andmodernizationcriteria,andappliestotheMilitaryDepartments,theDefenseAgencies,andtheDoDFieldActivitiesinaccordancewithUSD(AT&L)Memorandumdated29May2002.UFCwillbeusedforallDoDprojectsandworkforothercustomerswhereappropriate.AllconstructionoutsideoftheUnitedStatesisalsogovernedbyStatusofForcesAgreements(SOFA),HostNationFundedConstructionAgreements(HNFA),andinsomeinstances,BilateralInfrastructureAgreements(BIA.)Therefore,theacquisitionteammustensurecompliancewiththemorestringentoftheUFC,theSOFA,theHNFA,andtheBIA,asapplicable.UFCarelivingdocumentsandwillbeperiodicallyreviewed,updated,andmadeavailabletousersaspartoftheServices’responsibilityforprovidingtechnicalcriteriaformilitaryconstruction.Headquarters,U.S.ArmyCorpsofEngineers(HQUSACE),NavalFacilitiesEngineeringCommand(NAVFAC),and,AirForceCenterforEngineeringandtheEnvironment(AFCEE)areresponsibleforadministrationoftheUFCsystem.Defenseagenciesshouldcontactthepreparingservicefordocumentinterpretationandimprovements.TechnicalcontentofUFCistheresponsibilityofthecognizantDoDworkinggroup.Recommendedchangeswithsupportingrationaleshouldbesenttotherespectiveserviceproponentofficebythefollowingelectronicform:CriteriaChangeRequest(CCR).TheformisalsoaccessiblefromtheInternetsiteslistedbelow.UFCareeffectiveuponissuanceandaredistributedonlyinelectronicmediafromthefollowingsource:WholeBuildingDesignGuidewebsite:______________________________________JAMESC.DALTON,P.E.Chief,EngineeringandConstructionU.S.ArmyCorpsofEngineers______________________________________JOSEPHE.GOTT,P.E.ChiefEngineerNavalFacilitiesEngineeringCommand______________________________________PAULA.PARKERTheDeputyCivilEngineerDCS/Installations&LogisticsDepartmentoftheAirForce______________________________________MICHAELMcANDREWDirector,FacilityInvestmentandManagementOfficeoftheDeputyUnderSecretaryofDefense(InstallationsandEnvironment)UFC4-023-0314July2009A-2UNIFIEDFACILITIESCRITERIA(UFC)REVISIONSUMMARYSHEETSubject:UFC4-023-03,DesignofStructurestoResistProgressiveCollapseCancels:UFC4-023-03,DesignofStructurestoResistProgressiveCollapse,Dated25January,2005ReasonsforChange.UFC4-023-03wasupdatedforthefollowingreasons:•Incorporationofnewknowledgerelatedtothedesignofbuildingstoresistprogressivecollapse;thisincludestestdataandanalyticmodelsforoSteelbeam-columnconnectionsoWoodstructureunderblastdamageandcollapseloadingoReinforcedconcreteslabresponsetolargedeformationsoLoadanddynamicincreasefactorstoaccountforinertialeffectsandnonlineargeometryandmaterialbehavior;•Resolutionofcontradictionsinterminologyforstructuralconcepts;•Clarificationofambiguitiesandimpreciseguidanceforlinearstatic,nonlinearstatic,andnonlineardynamicstructuralanalysismethods;•Removalofstructuralhardeningrequirements(floorupwardloadanddoublecolumnheightrequirements);•Updateofexampleproblems;•Expansionofapplicabilitytoothergovernmentagencies.DescriptionofChanges.ThisupdatetoUFC4-023-03isasignificantrevisiontothe25January2005version.Thesignificantchangesinclude:•Replacementoflevelsofprotectionwithoccupancycategories,todeterminetherequiredlevelofprogressivecollapsedesign;•Definitionofastory•InclusionofAppendixB.Definitions,withdescriptionsofthekeytermsandstructuralanalysisconcepts.•Revisionofthelevelsofprogressivecollapsedesign,includingtheoptiontousetheAlternatePathMethodinlieuofTieForces,forOccupancyCategoryII;•Removalofthefloorupwardloadsanddoubledcolumnheightrequirements;•RevisionoftheTieForcemethod,includingforcemagnitudesandlocationsofTieForces;•AdoptionofmodelingparametersandacceptancecriteriafromASCE41SeismicRehabilitationofExistingBuildings;•Implementationofthe“m-factor”approachforLinearStaticanalysis;•InclusionofLoadIncreaseFactorsforLinearStaticmodelsandDynamicIncreaseFactorsforNonlinearStaticmodels;•RemovalofrequirementtoperformpeerreviewsofAlternatePathdesigns•Clarificationofsizeandlocationofload-bearingwallremoval;UFC4-023-0314July2009A-3•ReplacementoftheAdditio