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Keywords = CFS omega-shaped beams behavior

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23 pages, 7751 KB  
Article
Global Buckling Resistance of Cold-Formed Steel Beams with Omega-Shaped Sections
by Rita Peres, José Carvalho, Jean Antonio Emerick, Luís Macedo, José Luiz Rangel Paes and José Miguel Castro
Appl. Sci. 2024, 14(9), 3857; https://doi.org/10.3390/app14093857 - 30 Apr 2024
Cited by 1 | Viewed by 1868
Abstract
The absence of analytical expressions in current codes for evaluating the critical moment for lateral–torsional buckling of cold-formed beams with omega-shaped sections presents a fundamental challenge when assessing their resistance to global buckling. In response to this challenge, a comparative study was conducted [...] Read more.
The absence of analytical expressions in current codes for evaluating the critical moment for lateral–torsional buckling of cold-formed beams with omega-shaped sections presents a fundamental challenge when assessing their resistance to global buckling. In response to this challenge, a comparative study was conducted to explore various approaches for calculating the critical moment. This involved both analytical and numerical analyses, using different methods available in codes and computational tools. The analytical analysis followed the Effective Width Method, employing the expression proposed in ENV 1993-1-1:1992, which is commonly used for evaluating the critical lateral–torsional moment of hot-rolled profiles. Numerical analyses were then performed using the ABAQUS v6.13, GBTUL v2.0, and CUFSM v5.05 software packages. The ABAQUS model, validated with results obtained from an experimental campaign, serves as the reference model. Upon assessing the bending moment resistances according to European, Brazilian, and American standards, consistency was found among these standards. However, it became evident that using the analytical expression proposed for hot-rolled profiles is inadequate for evaluating the critical lateral–torsional moment of CFS omega-shaped profiles. Conversely, the agreement between the ABAQUS, GBTUL, and CUFSM results suggests their utility as reliable tools for estimating the elastic critical lateral–torsional buckling moment. Full article
(This article belongs to the Special Issue Steel Structural Stability in Civil Engineering)
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