Notional Cross-Sectional Area of Diagonals

Notional cross-sectional area of diagonals

A_{D}' = \frac{A_{D}}{1 + \frac{E_{D} \cdot A_{D}}{L_{D}} \cdot \sum \frac{1}{K_{ser}}}

A_D'	Notional cross-sectional area of diagonals
A_D	Cross-sectional area of diagonals
E_D	5 % quantile of the diagonals' modulus of elasticity
L_D	Length of diagonals
K_ser	Slip modulus of the connection

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