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Subject Area

Civil and Environmental Engineering

Article Type

Original Study

Abstract

This paper presents a comparative analysis between Eurocode3 (EC3), the North American Specification (AISI), and the Egyptian Code of Practice (ECP-205) to design Cold-Formed Steel (CFS) compression and flexural members with channel profiles. The research recognizes similarities and variations in strength measures to facilitate the learning process in the design codes, as well as the expressions and limits provided in the ECP, EC3, and AISI design codes. A computer program was designed to improve the speed of the calculation process. The software was created utilizing the C+ programming language and was programmed to calculate the axial load and bending moment capacities of CFS channels according to the different design codes. The capacities of the different design codes were compared to previously known experimental results and were subsequently utilized to analyze various parameters that affect the capacity of CFS compression element and beams. These parameters are the member slenderness ratio (λ), web plate slenderness ratio (h/t), flange plate slenderness ratio (b/t), lip-to-flange plate width ratio (d/b), and steel yielding stress (Fy). The study found that the λ, h/t, and b/t ratios indirectly affect CFS axial capacity. Furthermore, Indirect impacts of L/rt, h/t, and b/t ratios on CFS flexural capacity. Moreover, CFS capacity is directly influenced by the d/b ratio and Fy. A new modified equation has been proposed for the bending moment capacity obtained by ECP in the case of lateral torsional buckling failure.

Keywords

Cold-formed steel; Axial load capacity; Flexural capacity; Effective width method; Direct strength method; Codes.

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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