Determination of Related Slenderness Ratio

These formulas are used to determine the slenderness ratio on the basis of the LBA and MNA.

λ_{S} = \sqrt{F_{R, p l} / F_{R, c r}} = \sqrt{R_{p l} / R_{c r}}

λ	Relative slenderness
R_cr	Ideal elastic reference buckling resistance
R_pl	Plastic limit load

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