Table of Contents
1Introduction
1.1Scope
1.2ColumnStiffening
1.3ReferencesSpecifications
1.4DefinitionsofWind,Low-Seismic,and
High-SeismicApplications
1.5Acknowledgements
2Strong-AxisMomentConnectionstoUnreinforcedColumns
2.1ForceTransferinUnreinforcedColumns
2.2DeterminingtheDesignStrengthofanUnreinforced
Column
2.3ColumnCross-SectionalStiffnessConsiderations
2.4DesignAids
3EconomicalSelectionofColumns
3.1AchievingBalanceBetweenIncreasesInMaterial
CostandReductionsinLaborCost
3.2EliminatingColumnStiffening
3.3MinimizingtheEconomicImpactofColumnStiffening
RequirementsinWindandLow-SeismicApplications
3.4MinimizingtheEconomicsImpactofColumnStiffening
RequirementsinHigh-SeismicApplications
4Strong-AxisMomentConnectionstoStiffenedColumns
4.1DeterminingtheColumnStiffeningRequirements
4.2ForceTransferinStiffenedColumns
4.3DesignofTransverseStiffeners
4.4DesignofWebDoublerPlates
5SpecialConsiderations
5.1ColumnStiffeningforBeamsofDifferingDepth
and/orTopofSteel
5.2ColumnStiffeningforWeak-AxisMomentConnections
5.3ColumnStiffeningforConcurrentStrong-and
Weak-AxisMomentConnections
5.4WebDoublerPlatesasReinforcementforLocalWeb
Yielding,WebCrippling,and/orCompression
BucklingoftheWeb
5.5WebDoublerPlatesatLocationsofWeak-Axis
Connections
5.6DiagonalStiffeners
6DesignExamples
Example6-1
Example6-2
Example6-3
Example6-4
Example6-5
Example6-6
Example6-7
Example6-8
Example6-9
Example6-10
Example6-11
Example6-12
Example6-13
Example6-14
APPENDIXA
APPENDIXB
APPENDIXC
APPENDIXD
SpecialConsiderations
MomentConnectionstoColumnWebs Abstract
Determining the design stiffness and strength for unreinforced wide-flange columns at locations of strong axis beam-to-column moment connection. Covers the design of column stiffening elements such as web doubler plates and transverse stiffeners (also known as continuity plates), when the unreinforced column strength and/or stiffness is inadequate. In both cases recommendations for economy are included.
