Steel and Composite Structures

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Distortional effect on global buckling and post-buckling behaviour of steel box beams

  • Benmohammed, Noureddine (Laboratoire des Structures et Materiaux Avances dans le Genie Civil et Travaux Publics, Universite de Djillali Liabes) ;
  • Ziane, Noureddine (Laboratoire des Structures et Materiaux Avances dans le Genie Civil et Travaux Publics, Universite de Djillali Liabes) ;
  • Meftah, Sid Ahmed (Laboratoire des Structures et Materiaux Avances dans le Genie Civil et Travaux Publics, Universite de Djillali Liabes) ;
  • Ruta, Giuseppe (Department of Structural & Geotechnical Engineering, University 'La Sapienza')
  • Received : 2019.08.03
  • Accepted : 2020.05.30
  • Published : 2020.06.25
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Abstract

The homotopy perturbation method (HPM) to predict the pre- and post-buckling behaviour of simply supported steel beams with rectangular hollow section (RHS) is presented in this paper. The non-linear differential equations solved by HPM derive from a kinematics where large twist and cross-sections distortions are considered. The results (linear and non-linear paths) given by the present HPM are compared to those provided by the Newton-Raphson algorithm with arc length and by the commercial FEM code Abaqus. To investigate the effect of cross-sectional distortion of beams, some numerical examples are presented.

Keywords

Acknowledgement

We acknowledge the support of institutional grants of the Algerian Directorate General for Scientific Research and Technological Development. Thanks are also due to "La Sapienza" University, Rome, Italy, for the cooperation.

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