Finite Element Analysis of Buckling Behavior for Cold-Formed Steel Hat Purlins with Openings

De’nan, Fatimah; Choong, Kok Keong; Ling, Jin Ying; Hashim, Nor Salwani

doi:10.1007/s13296-022-00618-x

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…Dib, Ramos, and Vieira [11] analyzed the structural behavior of cold-formed steel hat-section beams under non-uniform bending, using GBTUL and ABAQUS. De'nan et al [12,13] numerically evaluated the buckling behavior of hat-shaped sections with holes along the section. Ma, Rasmussen, and Zhang [14] and Dar et al [15] conducted four-point bending tests on cold-formed steel beams with different innovative cross-sectional shapes to assess their potential instability modes.…”

Section: Introductionmentioning

confidence: 99%

Global Buckling Resistance of Cold-Formed Steel Beams with Omega-Shaped Sections

Peres,

Carvalho,

Emerick

et al. 2024

Applied Sciences

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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.

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