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Influence of cold bending on the resistance of wide flange members

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Abstract

Cold rolling is used for bending straight members with hot rolled wide-flange sections to create arches. Extensive studies have shown that the influence of residual stresses due to hot rolling on the resistance of wide-flange steel sections is nonnegligible. On the contrary, the residual stress pattern due to roller bending has been only recently identified. Its effects on the elasto-plastic behavior of curved members have not been studied sufficiently. In this paper, an in-depth study of the influence of such residual stresses is performed. Considering the residual stress pattern due to cold bending, interaction diagrams and buckling curves for cold bent steel arches are developed. The results are quantified and compared with those for hot-rolled and stress free members. This allows designers to appreciate the available margins of safety when using standard interaction equations and buckling curves for cold bent members. Furthermore, the results suggest the necessity for the development of buckling curves for cold bent members including initial imperfections.

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Authors and Affiliations

  1. Architectural & Environmental Engineering Department, Cockrell School of Engineering, The University of Texas at Austin, 5350 Burnet Rd, Apt.246, Austin, Texas, 78756, USA

    Michalis Hadjioannou

  2. IFSTTAR, Université Paris-Est, 14-20 bd Newton, 77447, Champs-sur-Marne, France

    Cyril Douthe

  3. School of Civil Engineering, Institute of Steel Structures, National Technical University of Athens, 9, Iroon Polytechneiou Str., GR-15780, Athens, Greece

    Charis J. Gantes

Authors
  1. Michalis Hadjioannou
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  2. Cyril Douthe
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  3. Charis J. Gantes
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Correspondence to Michalis Hadjioannou.

Additional information

Note.-Discussion open until November 1, 2013. This manuscript for this paper was submitted for review and possible publication on March 14, 2012; approved on June 10, 2013.

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Hadjioannou, M., Douthe, C. & Gantes, C.J. Influence of cold bending on the resistance of wide flange members. Int J Steel Struct 13, 353–366 (2013). https://doi.org/10.1007/s13296-013-2013-6

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