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Eigenvalue analysis of flexural-torsional buckling of angle-bar stiffened plates

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Abstract

Equilibrium method is employed to analyze interaction of flexural and torsional buckling of angle-bar stiffened plates. The cross sectional areas of the angle-bar stiffened plate for these two modes are different (hybrid beam). In flexural buckling mode, angle-bar and attached plate buckle together, however in torsional buckling mode only angle-bar would be buckled. Basic equations of equilibrium for flexural and torsional buckling modes of angle-bar stiffened plates are deduced based on hybrid beam concept and new strain distribution assumption for sideway bending of stiffeners. Elastic buckling stress of different angle-bar stiffened plates are calculated and compared with finite element method and those available in the literature. It is shown that present method has very good agreements with finite element method for isolated rigid angle-bar and isolated rigid angle-bar with rigid attached plate. For isolated rigid angle-bar with pin connected to rigid attached plates it has better agreement than previously proposed method.

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Authors and Affiliations

  1. Department of Ocean Engineering, AmirKabir University of Technology, Hafez Ave., Tehran, 15914, Iran

    Ahmad Rahbar-Ranji

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  1. Ahmad Rahbar-Ranji
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Correspondence to Ahmad Rahbar-Ranji.

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Rahbar-Ranji, A. Eigenvalue analysis of flexural-torsional buckling of angle-bar stiffened plates. Int J Steel Struct 16, 823–830 (2016). https://doi.org/10.1007/s13296-015-0010-7

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  • DOI: https://doi.org/10.1007/s13296-015-0010-7

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