Szukana fraza: [Abstract = "Thus a different imperfection force is generated in comparison with this given in EN 1993\-1\-1. In the paper the equivalent stabilizing force qd of simply supported roof girders has been analyzed. The formulas for an equivalent stabilizing forces of restrained roof girders with parabolic variability of axial force, have been proposed. Obtained results have been discussed and illustrated with examples."]

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