Structural Performance of Perforated Steel Beam Columns” A Parametric Study

Document Type : Original Article

Author

Higher Institute of Engineering, El-Shorouk Academy, Nakheel district

Abstract

The objective of this research is to conduct a parametric study for unstiffened and stiffened steel beam columns with openings and develop their design equations. Since the presence of openings in the beam columns is inevitable, maintaining strength is crucial. Steel beam columns with openings are stiffened with two different stiffening schemes around the opening: horizontally and vertically. Unfortunately, there are no available design equations for steel beam columns with openings except Darwin’s’ which are suitable for compact beams’ web. The parameters studied are the opening shape, web slenderness (non-compact and slender), the effect of stiffening, and opening location with respect to the support. Interaction curves are plotted according to analytical finite element models. Both lateral-torsional buckling and local buckling are observed. Using a square opening instead of a rectangular opening result in a rise in the moment’s capacity of up to 18%. Moment resistance can be increased by up to 19% and 20%, respectively, when beam columns are stiffened with vertical and horizontal stiffeners around the opening. The normal and moment resistances decreased by up to 2% and 10%, respectively, when the opening was moved from support to near mid-span. Finally, the proposed design equations for beam columns with openings give agreeable results in the moment and normal strengths.

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The Egyptian International Journal of Engineering Sciences and Technology
Volume 52, Issue 1
December 2025
Pages 55-68

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