Formulas: Web Local Buckling

Formula 1

M_{n}=M_{p}-\left(M_{p}-F_{y} S\right)\left(\frac{\lambda-\lambda_{p w}}{\lambda_{r w}-\lambda_{p w}}\right) \leq M_{p}

$\lambda_{p w}=\lambda_{p}$ , the limiting width-to-thickness ratio for a compact web as defined in Table B4.1b

\lambda_{p w}=\lambda_{p}

$\lambda_{n w}=\lambda_{r}$ , the limiting width-to-thickness ratio for a noncompact web as defined in Table B4.1b

\lambda_{n w}=\lambda_{r}

M_{n}=R_{p g} F_{y} S

where

$R_{p g}$ is defined by Equation F5-6 with $a_{w}=2 h t_{w} /\left(\left.b t_{f}\right)\right)$

$R_{p g}$ is defined by Equation F5-6 with $a_{w}=2 h t_{w} /\left(\left.b t_{f}\right)\right)$

a_{w}=2 h t_{w} /\left(\left.b t_{f}\right)\right)