Formulas: Web Sidesway Buckling

Formula 1

(1) When $\left(h / t_{w}\right) /\left(L_{b} / b_{f}\right) \leq 2.3$

\left(h / t_{w}\right) /\left(L_{b} / b_{f}\right) \leq 2.3

R_{n}=\frac{C_{r} t_{w}^{3} t_{f}}{h^{2}}\left[1+0.4\left(\frac{h / t_{w}}{L_{b} / b_{f}}\right)^{3}\right]

(2) When $\left(h / t_{w}\right) /\left(L_{b} / b_{f}\right)>2.3$ , the limit state of web sidesway buckling does not apply.

\left(h / t_{w}\right) /\left(L_{b} / b_{f}\right)>2.3

(1) When $\left(h / t_{w}\right) /\left(L_{b} / b_{f}\right) \leq 1.7$

\left(h / t_{w}\right) /\left(L_{b} / b_{f}\right) \leq 1.7

R_{n}=\frac{C_{r} t_{w}^{3} t_{f}}{h^{2}}\left[0.4\left(\frac{h / t_{w}}{L_{b} / b_{f}}\right)^{3}\right]

(2) When $\left(h / t_{w}\right) /\left(L_{b} / b_{f}\right)>1.7$ , the limit state of web sidesway buckling does not apply.

\left(h / t_{w}\right) /\left(L_{b} / b_{f}\right)>1.7