ACI-318-05

ConcreteFrameDesignManualACI318-05/IBC2006ForSAP2000®andETABS®Berkeley,CaliforniaDecember2007COPYRIGHTCopyright©ComputersandStructures,Inc.,1978-2007.Allrightsreserved.TheCSILogo®,SAP2000®,andETABS®areregisteredtrademarksofComputersandStructures,Inc.SAFETMandWatch&LearnTMaretrademarksofComputersandStructures,Inc.ThecomputerprogramsSAP2000®andETABS®andallassociateddocumentationareproprietaryandcopyrightedproducts.WorldwiderightsofownershiprestwithComputersandStructures,Inc.Unlicenseduseoftheseprogramsorreproductionofdocumentationinanyform,withoutpriorwrittenauthorizationfromComputersandStructures,Inc.,isexplicitlyprohibited.Nopartofthispublicationmaybereproducedordistributedinanyformorbyanymeans,orstoredinadatabaseorretrievalsystem,withoutthepriorexplicitwrittenpermissionofthepublisher.Furtherinformationandcopiesofthisdocumentationmaybeobtainedfrom:ComputersandStructures,Inc.1995UniversityAvenueBerkeley,California94704USAPhone:[phone]FAX:[phone]e-mail:[e-mail](forgeneralquestions)e-mail:[e-mail](fortechnicalsupportquestions)web:’SPROGRAMS.THEPROGRAMSHAVEBEENTHOROUGHLYTESTEDANDUSED.INUSINGTHEPROGRAMS,HOWEVER,THEUSERACCEPTSANDUNDERSTANDSTHATNOWARRANTYISEXPRESSEDORIMPLIEDBYTHEDEVELOPERSORTHEDISTRIBUTORSONTHEACCURACYORTHERELIABILITYOFTHEPROGRAMS.THEPROGRAMSAREVERYPRACTICALTOOLSFORTHEDESIGN/CHECKOFSTRUCTURES.HOWEVERTHEUSERMUSTTHOROUGHLYREADTHEMANUALSANDMUSTCLEARLYRECOGNIZETHEASPECTSOFDESIGNTHATTHEPROGRAMALGORITHMSDONOTADDRESS.THEUSERMUSTEXPLICITLYUNDERSTANDTHEASSUMPTIONSOFTHEPROGRAMSANDMUSTINDEPENDENTLYVERIFYTHERESULTS.3ContentsChapter1Introduction....................................................1-1Organization.............................................................................1-2RecommendedReading/Practice.............................................1-3Chapter2DesignPrerequisites.....................................2-1DesignLoadCombinations......................................................2-1SeismicLoadEffects................................................................2-3DesignandCheckStations......................................................2-4IdentifyingBeamsandColumns..............................................2-4DesignofBeams......................................................................2-4DesignofColumns...................................................................2-5DesignofJoints.......................................................................2-6P-DeltaEffects..........................................................................2-7ElementUnsupportedLength...................................................2-8iDesignManualConcreteFrameACI318-05ChoiceofInputUnits................................................................2-8Chapter3DesignProcess.............................................3-1Notation....................................................................................3-1DesignLoadCombinations......................................................3-4ColumnDesign.........................................................................3-6GenerationofBiaxialInteractionSurface..........................3-7CalculateColumnCapacityRatio....................................3-11RequiredReinforcingArea...............................................3-15DesignColumnShearReinforcement.............................3-15BeamDesign..........................................................................3-26DesignBeamFlexuralReinforcement.............................3-26DesignforRectangularBeam..........................................3-27DesignforTBeam...........................................................3-30MinimumandMaximumTensileReinforcement..............3-34SpecialConsiderationforSeismicDesign.......................3-34DesignBeamShearReinforcement................................3-37DesignBeamTorsionReinforcement..............................3-42JointDesign............................................................................3-46DeterminethePanelZoneShearForce..........................3-47DeterminetheEffectiveAreaofJoint..............................3-49CheckPanelZoneShearStress.....................................3-50Beam-ColumnFlexuralCapacityRatios..........................3-50Chapter4DesignOutput.................................................4-1Overview...................................................................................4-1GraphicalDisplayofDesignInformation..................................4-2Input/Output.......................................................................4-2TabularDisplayofDesignoutput.............................................4-4iiContentsMemberSpecificInformation....................................................4-6InteractiveConcreteFrameDesign...................................4-8ErrorsMessagesandWarnings...............................................4-9Ap