I perform an analysis according to General Method 6.3.4 EN 1993‑1‑1 and have activated the addition 'Adapted Method According to Naumes'. The critical factor α*crit is displayed in red. Should I be worried?

Answer

No, you do not have to worry. If the value of alpha*crit (the critical buckling value without torsional stiffness) is displayed in red and thus amounts to '0', there is no reduction of the imperfection factor (European lateral-torsional buckling line). The basic value for the imperfection factor is used.

Keywords

stability General Method Naumes critical factor critical buckling value transverse bending bending and compression buckling lateral-torsional buckling torsional-flexural buckling

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