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Steel and Composite Structures
  Volume 5, Number 6, December 2005 , pages 515-533

Numerical modelling and codification of imperfections for cold-formed steel members analysis
Dan Dubina, Viorel Ungureanu and Jacques Rondal

    Buckling and post-buckling of cold-formed steel members are rather difficult to predict due to material and geometrical non-linearity. However, numerical techniques have reached a level of maturity such that many are now successfully undertaking ultimate strength analysis of cold-formed steel members. In numerical non-linear analysis, both geometrical and material imperfections, have to be estimated and properly used. They must be codified in terms of shape and magnitude. The presented paper represents a state-of-art report, including relevant results obtained by the authors and collected from literature, on that problem.
Key Words
    thin-walled cold-formed members; material and geometrical imperfections; numerical modelling; codification.
Dan Dubina; Dept. of Steel Structures and Structural Mechanics, Faculty of Civil Eng., \"Politehnica\" University of Timisoara, I. Curea 1, Timisoara, 300224, RomaniarnViorel Ungureanu; Laboratory of Steel Structures, Romanian Academy, Timisoara Branch, M. Viteazul 24, 300223, RomaniarnJacques Rondal; Department of Mechanics of Materials and Structures, University of Liege, Chemin des Chevreuils 1, B-4000, Liege, Belgium

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