Local buckling coefficients for thin-walled lipped channels under bending about asymmetrical axis
This paper aims to calibrate a formula for determining the buckling coefficient of thin-walled lipped channels subjected to bending about the asymmetrical axis when the web is in compression to modify the current analytical solution in AISI S100, which has been reported to have poor accuracy. A para...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
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| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025010114 |
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| Summary: | This paper aims to calibrate a formula for determining the buckling coefficient of thin-walled lipped channels subjected to bending about the asymmetrical axis when the web is in compression to modify the current analytical solution in AISI S100, which has been reported to have poor accuracy. A parametric study, combined with the exclusion method, was performed on results derived from the Finite Strip Method of 177 models simulated using THIN-WALL-2 software. Based on the finding that the local buckling mode of the web governs the buckling under the present loading condition, a novel set of expressions, using a piecewise function as the core, was proposed to calculate the buckling coefficient. These expressions result from a data regression. Compared to previous studies, the new expressions are simpler and more accurate. In the range of common commercial cross-sections, new formulas bring an error of only 1.83 %. The newly proposed expressions also consider the influence of material properties and corner radius, which were ignored in previous studies. |
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| ISSN: | 2590-1230 |