AISCAISC 360-22
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Formulas: Web Local Crippling

PDF page 219 · AISC 360-22

Equation J10-4

Rn=0.80tw2[1+3(lbd)(twtf)1.5]EFywtftwQfR_{n}=0.80 t_{w}^{2}\left[1+3\left(\frac{l_{b}}{d}\right)\left(\frac{t_{w}}{t_{f}}\right)^{1.5}\right] \sqrt{\frac{E F_{y w} t_{f}}{t_{w}}} Q_{f}

Formula 2

(1) For lb/d≤0.2l_{b} / d \leq 0.2

lb/d≤0.2l_{b} / d \leq 0.2

Equation J10-5a

Rn=0.40tw2[1+3(lbd)(twtf)1.5]EFywtftwQfR_{n}=0.40 t_{w}^{2}\left[1+3\left(\frac{l_{b}}{d}\right)\left(\frac{t_{w}}{t_{f}}\right)^{1.5}\right] \sqrt{\frac{E F_{y w} t_{f}}{t_{w}}} Q_{f}

Formula 4

Rn=0.40tw2[1+(4lbd−0.2)(twtf)1.5]EFywtftwQfR_{n}=0.40 t_{w}^{2}\left[1+\left(\frac{4 l_{b}}{d}-0.2\right)\left(\frac{t_{w}}{t_{f}}\right)^{1.5}\right] \sqrt{\frac{E F_{y w} t_{f}}{t_{w}} Q_{f}}

where

  • Qf= chord-stress interaction parameter =1.0 for wide-flange sections, channels,  box sections, and for HSS (connecting surface) in tension = as given in Section K1.3 for all other HSS conditions \begin{aligned} Q_{f} & =\text { chord-stress interaction parameter }=1.0 \text { for wide-flange sections, channels, } \\ & \text { box sections, and for HSS (connecting surface) in tension } \\ & =\text { as given in Section K1.3 for all other HSS conditions }\end{aligned}
  • dd \quad = full nominal depth of the member, in. (mm)

Found in

Formulas: Web Local Yielding

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