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Combined Bending and Axial Loads

53:134 Structural design II Combined Bending and Axial Loads Related Material AISC LRFD Manual: Part 6 AISC LRFD Specifications: Chapter C, Chapter H Two New Concepts Superposition of stresses due to Bending and Axial Loads Secondary moment due to Axial Loads ; moment amplification Interaction Equations Strength interaction equations relating Axial compression Pu to Bending moment Mu have been recognized as the practical procedure for design . Axial compression strength requirement Required Axial strength design Axial strength of the section ncuPP , or 1ucnPP Bending moment strength requirement Required Bending strength design Bending strength of the section nbuMM , or 1ubnMM Combined Bending and Axial compression: Interaction equation 1uucnb nPMPM + Arora/Q. Wang 153:134 Structural design II LRFD Criteria For PPucn 02., 198 +nbuncuMMPP For PPucn <02., 12 +nbuncuMMPP cb==085090.

bending moment Mu have been recognized as the practical procedure for design. • Axial compression strength requirement Required axial strength ≤ Design axial strength of the section u c n ≤φP P, or 1 u cn P φP ≤ • Bending moment strength requirement Required bending strength ≤ Design bending strength of the section u b n ≤φM M ...

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  Design, Moment, Bending, Bending moment, Design bending

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