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A platform for research: civil engineering, architecture and urbanism
Moment gradient factor of cellular steel beams under inelastic flexure
https://orcid.org/0000-0002-5439-2682
Abstract The flexural capacity of cellular steel beams is influenced by both local and global instabilities. In the current paper, the finite element method is employed to investigate the inelastic behavior of cellular steel beams under combined buckling modes. A three-dimensional non-linear finite element model, that takes into consideration possible interaction between lateral torsional/distortional buckling modes and localized deformations of the cross section is developed and validated against available results in the literature. The study considers simply supported beams subjected to three different load configurations; mid-span load, uniformly distributed load and end moments. An extensive parametric analysis is conducted to assess the impact of various geometrical parameters on the inelastic stability of cellular steel beams. These parameters include the dimensions of the beam cross-section; flange width and thickness, web height and thickness, and hole size and spacing. The moment gradient factors that correspond to various buckling modes experienced by the wide range of dimensions considered in the simulation study are reported. The outcomes of the this study are expected to provide more insight into the behavior of cellular steel beams and enable accurate prediction of the moment gradient factor and consequently the flexural capacity of this special type of steel beams.
Highlights To study inelastic lateral buckling of cellular steel beams Influence of buckling modes interaction is investigated. A comprehensive FE analyses of 1512 cellular beams are presented. Outcomes are presented through the variation of the moment gradient factor Cb.
Moment gradient factor of cellular steel beams under inelastic flexure
https://orcid.org/0000-0002-5439-2682
Abstract The flexural capacity of cellular steel beams is influenced by both local and global instabilities. In the current paper, the finite element method is employed to investigate the inelastic behavior of cellular steel beams under combined buckling modes. A three-dimensional non-linear finite element model, that takes into consideration possible interaction between lateral torsional/distortional buckling modes and localized deformations of the cross section is developed and validated against available results in the literature. The study considers simply supported beams subjected to three different load configurations; mid-span load, uniformly distributed load and end moments. An extensive parametric analysis is conducted to assess the impact of various geometrical parameters on the inelastic stability of cellular steel beams. These parameters include the dimensions of the beam cross-section; flange width and thickness, web height and thickness, and hole size and spacing. The moment gradient factors that correspond to various buckling modes experienced by the wide range of dimensions considered in the simulation study are reported. The outcomes of the this study are expected to provide more insight into the behavior of cellular steel beams and enable accurate prediction of the moment gradient factor and consequently the flexural capacity of this special type of steel beams.
Highlights To study inelastic lateral buckling of cellular steel beams Influence of buckling modes interaction is investigated. A comprehensive FE analyses of 1512 cellular beams are presented. Outcomes are presented through the variation of the moment gradient factor Cb.
Moment gradient factor of cellular steel beams under inelastic flexure
https://orcid.org/0000-0002-5439-2682
Abstract The flexural capacity of cellular steel beams is influenced by both local and global instabilities. In the current paper, the finite element method is employed to investigate the inelastic behavior of cellular steel beams under combined buckling modes. A three-dimensional non-linear finite element model, that takes into consideration possible interaction between lateral torsional/distortional buckling modes and localized deformations of the cross section is developed and validated against available results in the literature. The study considers simply supported beams subjected to three different load configurations; mid-span load, uniformly distributed load and end moments. An extensive parametric analysis is conducted to assess the impact of various geometrical parameters on the inelastic stability of cellular steel beams. These parameters include the dimensions of the beam cross-section; flange width and thickness, web height and thickness, and hole size and spacing. The moment gradient factors that correspond to various buckling modes experienced by the wide range of dimensions considered in the simulation study are reported. The outcomes of the this study are expected to provide more insight into the behavior of cellular steel beams and enable accurate prediction of the moment gradient factor and consequently the flexural capacity of this special type of steel beams.
Highlights To study inelastic lateral buckling of cellular steel beams Influence of buckling modes interaction is investigated. A comprehensive FE analyses of 1512 cellular beams are presented. Outcomes are presented through the variation of the moment gradient factor Cb.
Moment gradient factor of cellular steel beams under inelastic flexure
El-Sawy, Khaled M. (author) / Sweedan, Amr M.I. (author) / Martini, Mohammad Iqbal (author)
Journal of Constructional Steel Research ; 98 ; 20-34
2014-02-17
15 pages
Article (Journal)
Electronic Resource
English
Moment gradient factor of cellular steel beams under inelastic flexure
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Inelastic beams under moment gradient
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Inelastic steel beams under uniform moment
| Engineering Index Backfile | 1965
On Inelastic Buckling of High Strength Steel Beams Under Moment Gradient
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| British Library Conference Proceedings | 1999