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Elastic and inelastic buckling of steel cellular beams under strong-axis bending

Rajana, K., Tsavdaridis, K. D. ORCID: 0000-0001-8349-3979 and Koltsakis, E. (2020). Elastic and inelastic buckling of steel cellular beams under strong-axis bending. Thin-Walled Structures, 156, 106955. doi: 10.1016/j.tws.2020.106955

Abstract

This paper presents an extensive parametric study of elastic and inelastic buckling of cellular beams subjected to strong axis bending in order to investigate the effect of a variety of geometric parameters, and further generate mass data to validate and train a neural network-based formula. Python was employed to automate mass finite element (FE) analyses and reliably examine the influence of the parameters. Overall, 102,060 FE analyses were performed. The effects of the initial geometric imperfection, material nonlinearity, manufacture-introduced residual stresses, web opening diameter, web-post width, web height, flange width, web and flange thickness, end web-post width, and span of the beams and their combinations were thoroughly examined. The results are also compared with the current state-of-the-art design guidelines used in the UK. It was concluded that the critical elastic buckling load of perforated beams corresponds to the lateral movement of the compression flange while the most critical parameters are the web thickness and the geometry of the flange. However, from the inelastic analysis, the geometry and position of the web opening influence the collapse load capacity in a similar fashion to the geometry of the flange and thickness of the web. It was also concluded that the effect of the initial conditions was insignificant.

Publication Type: Article
Additional Information: © 2020, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/.
Publisher Keywords: Cellular beams, Elastic and inelastic buckling, Strong-axis bending, FEA, Parametric studies, Automated analyses, Python, Mass data
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Departments: School of Mathematics, Computer Science & Engineering > Engineering > Civil Engineering
Date available in CRO: 10 Nov 2021 11:50
Date deposited: 10 November 2021
Date of acceptance: 5 July 2020
Date of first online publication: 29 August 2020
URI: https://openaccess.city.ac.uk/id/eprint/27006
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