Stopień wykorzystania zginania dwukierunkowego i ściskania osiowego

Combined Biaxial Bending and Axial Compression Design Ratio

{(\frac{f_{c}}{F_{c}'})}^{2} + \frac{f_{bx}}{F_{bx}' \cdot [1 - (\frac{f_{c}}{F_{cEx}})]} + \frac{f_{by}}{F_{by}' \cdot [1 - (\frac{f_{c}}{F_{cEy}}) - {(\frac{f_{bx}}{F_{bE}})}^{2}]} ⩽ 1.0

{(\frac{171}{673})}^{2} + \frac{353}{1, 729 \cdot [1 - (\frac{171}{3, 965})]} + \frac{1, 029}{1, 936 \cdot [1 - (\frac{171}{728}) - {(\frac{353}{6, 577})}^{2}]} = 0.98

f_c	Compression stress due to the dead and snow load
F_c'	Adjusted compressive design value parallel to the grain
f_bx	Major-axis bending stress due to the wind load
F_bx'	Adjusted major axis bending design value
F_cEx	Critical buckling design value for the compression member in the major axis
f_by	Minor-axis bending stress due to the dead and snow load
F_by'	Adjusted minor axis bending design value
F_cEy	Critical buckling design value for the compression member in the minor axis
F_bE	Critical buckling design value for the bending member

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