Present approach to design of steel I-section beam-columns distinguish two design situations of elements subjected to one directional bending and compression in which they are sensitive either to the flexural failure (second order in-plane bending and compression) or to the flexural-torsional failure (second order spatial bending, warping torsion and compression). This paper refers to the former case of member failure and aims in the development of finite element numerical modelling technique that would be useful for the verification of analytical resistance criteria of perfect beam-column elements subjected to different support and loading conditions. Impact of different boundary conditions and nonuniform bending on the member resistance is assessed and concluding remarks in relation to the proposed analytical formulation are drawn.
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