Techno Press

Steel and Composite Structures   Volume 1, Number 1, March 2001, pages 75-96
The ECBL approach for interactive buckling of thin-walled steel members
Dan Dubina(Romania)

Abstract     [Full Text]
    Actual buckling curves are always characterised by the erosion of ideal buckling curves. Inrncase of compact sections this erosion is due to the imperfections, while for thin-walled members, arnsupplementary erosion is induced by the phenomenon of coupled instabilities. The ECBL approach-rnErosion of Critical Bifurcation Load - represents a practical and convenient tool to characterise therninstability behaviour of thin-walled members. The present state-of-art paper describes the theoreticalrnbackground of this method and the applications to cold-formed steel sections in compression andrnbending. Special attention is paid to the evaluation methods of erosion coefficient and to their validation.rnThe ECBL approach can be also used to the plastic-elastic interactive buckling of thin-walled members,rnand the paper provides significant results on this line.
Key Words
    thin-walled steel sections; local buckling; overall buckling; critical load; coupled instabilities;rnimperfections; erosion; coupling range; buckling curves; local plastic mechanism.
Department of Steel Structures and Structural Mechanics, Civil Engineering and Architecture Faculty,?olitehnica?University of Timisoara, Stadion 1, RO-1900, Timisoara, Romania

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