Formulas: Web Panel-Zone Shear

Equation C-J10-3a

\Sigma F_{u}=\frac{M_{u 1}}{d_{m 1}}+\frac{M_{u 2}}{d_{m 2}}-V_{u}

Equation C-J10-3b

\Sigma F_{a}=\frac{M_{a 1}}{d_{m 1}}+\frac{M_{a 2}}{d_{m 2}}-V_{a}

where

$M_{a 1}=M_{a 1} L+M_{a 1} G$

= sum of the moments due to the nominal lateral loads, $M_{a 1 L}$ , and the mo ments due to nominal gravity loads, $M_{a 1 G}$ , on the windward side of the connection, kip-in. (N-mm)

$M_{a 2}=M_{a 2 L}-M_{a 2 G}$

= difference between the moments due to the nominal lateral loads, $M_{a 2 L}$ , and the moments due to nominal gravity loads, $M_{a 2 G}$ , on the leeward side of the connection, kip-in. (N-mm)

Formula 3

M_{a 1}=M_{a 1} L+M_{a 1} G

Formula 4

M_{a 2}=M_{a 2 L}-M_{a 2 G}

Formula 5

If, for LRFD, $\Sigma F_{u} \leq \phi R_{n}$ , or for ASD, $\Sigma F_{a} \leq R_{n} / \Omega$ , no reinforcement is necessary; in other words, $t_{\text {req }} \leq t_{w}$ , where $t_{w}$ is the column web thickness.

\Sigma F_{u} \leq \phi R_{n}

Formula 6

\Sigma F_{a} \leq R_{n} / \Omega

Formula 7

t_{\text {req }} \leq t_{w}

Found in

FLANGES AND WEBS WITH CONCENTRATED FORCES