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1、DISCLAIMERThisdocumentprovidesrecommendedcriteriafortheseismicevaluationandupgradeofweldedsteelmoment-framebuildings.Therecommendationsweredevelopedbypracticingengineersbasedonprofessionaljudgmentandexperienceandsupportedbyalargeprogramoflaboratory,field,andanal
2、yticalresearch.Whileeveryefforthasbeenmadetosolicitcommentsfromabroadselectionoftheaffectedparties,thisisnotaconsensusdocument.Nowarrantyisoffered,withregardtotherecommendationscontainedherein,eitherbytheFederalEmergencyManagementAgency,theSACJointVenture,theind
3、ividualJointVenturepartners,ortheirdirectors,membersoremployees.Theseorganizationsandtheiremployeesdonotassumeanylegalliabilityorresponsibilityfortheaccuracy,completeness,orusefulnessofanyoftheinformation,productsorprocessesincludedinthispublication.Thereaderisc
4、autionedtocarefullyreviewthematerialpresentedhereinandexerciseindependentjudgmentastoitssuitabilityforapplicationtospecificengineeringprojects.TheserecommendedcriteriahavebeenpreparedbytheSACJointVenturewithfundingprovidedbytheFederalEmergencyManagementAgency,un
5、dercontractnumberEMW-95-C-4770.CoverArt.Thebeam-columnconnectionassemblyshownonthecoverdepictsthestandarddetailingusedinweldedsteelmoment-frameconstructionpriortothe1994Northridgeearthquake.Thisconnectiondetailwasroutinelyspecifiedbydesignersintheperiod1970-1994
6、andwasprescribedbytheUniformBuildingCodeforseismicapplicationsduringtheperiod1985-1994.Itisnolongerconsideredtobeanacceptabledesignforseismicapplications.FollowingtheNorthridgeearthquake,itwasdiscoveredthatmanyofthesebeam-columnconnectionshadexperiencedbrittlefr
7、acturesatthejointsbetweenthebeamflangesandcolumnflanges.RecommendedSeismicEvaluationandUpgradeCriteriaforExistingWeldedSteelMoment-FrameBuildingsSACJointVentureApartnershipofStructuralEngineersAssociationofCalifornia(SEAOC)AppliedTechnologyCouncil(ATC)California
8、UniversitiesforResearchinEarthquakeEngineering(CUREe)PreparedforSACJointVenturePartnershipbyGuidelinesDevelopmentCommitteeRonaldO.Hamburger,ChairJohnD.HooperThomasSab
