A Study of the Increase in In-Plane Flexural Capacity of Cellular Steel Sections Based on EN1993-1-1 and ANSI/AISC 360-10 Codes
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Abstract
Nowadays, cellular beams have been widely used for building construction due to their modern appearance and the utility of their openings. However, studies on the increase in the flexural capacity of the cellular beams from the parent profile beams are still lacking. Therefore, this paper aimed to investigate the increase of the in-plane flexural capacity of the cellular beams based on the structural steel design codes of EN1993-1-1 and ANSI/AISC 360-10 under the requirements of SCI P355. An examination was conducted through a parametric study that included the variation of parameters such as the size properties of the H-shaped steel, opening ratios, and spacing of the opening ratios. From the parametric study results, it was found that the cellular beam’s in-plane bending capacity increases from the in-plane bending capacity of the parent profile beams with increasing in the opening ratios and the flange-web area ratio, and with decreasing in the spacing of the opening ratios and the depth-to-width ratio. Based on the influence of the opening ratios and spacing of the opening ratios on the in-plane bending capacity of the cellular beams, the flexural capacity increased with an average value of 39 and 41.38 % for EN1993-1-1 and ANSI/AISC 360-10, respectively. Furthermore, the in-plane bending capacity of the cellular beams for both design codes increased with an average value of 56.74 % due to the influence of the flange-web area ratio and depth-to-width ratio.
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