Wood design -Bending.pptx - CE 466 Building Construction Engineering Beam Design North Carolina State University Beam Design Beam Design \u2022 Approach

# Wood design -Bending.pptx - CE 466 Building Construction...

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Beam Design North Carolina State University CE 466 Building Construction Engineering
Beam Design
Beam Design Approach for beam design? What criteria will you consider for beam design? a) Bending b) Shear c) Deflection d) Bearing
Allowable Stresses “Resistance” Stresses Imposed by Load F b ’ = F b *C D *C M *C t *C L *C F *C fu *C i *C r ƒ b = M*y/I F t ’ = F t *C D *C M *C t *C F *C i ƒ t = P/A net F v ’ = F v *C D *C M *C t *C i ƒ v = V*Q / (I*b) F c ’ = F c *C D *C M *C t *C F *C i *C P ƒ c = P/A F c┴ ’ = F c┴ *C M *C t *C i ƒ c┴ = P/A E’ = E*C M *C t *C i Δ E min ’ = E min *C M *C t *C i *C T C P Beam Design
Bending Bending Stress: Eqn 3.3-1 ASD LRFD ? ? ? ?
Bending Adjusted Stress F' b =F b C D C M C t C L C F C fu C i C r (ASD) F' b =F b φ b λ C M C t C L C F C fu C i C r K F (LRFD)
Bending Beam Stability factor (C L ) F' b =F b C D C M C t C L C F C fu C i C r (ASD) What is the normal case? - Lateral torsional buckling C L = 1 Sec. 3.3.3
Bending Beam Stability factor (C L ) C L 1 Sec. 3.3.3 d b d b C L 1
Bending Beam Stability factor (C L ) Sec. 3.3.3 where F b * = F b times all C applicable except C

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• Summer '20
• Buckling, Beam Design

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