Numerical method for predicting the elastic lateral distortional buckling moment of a mono-symmetric beam with web openings

Seo, Jung Kwan, Mahendran, Mahen, & Paik, Jeom Kee (2011) Numerical method for predicting the elastic lateral distortional buckling moment of a mono-symmetric beam with web openings. Thin-Walled Structures, 49(6), pp. 713-723.

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When used as floor joists, the new mono-symmetric LiteSteel beam (LSB) sections require web openings to provide access for inspections and various services. The LSBs consist of two rectangular hollow flanges connected by a slender web, and are subjected to lateral distortional buckling effects in the intermediate span range. Their member capacity design formulae developed to date are based on their elastic lateral buckling moments, and only limited research has been undertaken to predict the elastic lateral buckling moments of LSBs with web openings. This paper addresses this research gap by reporting the development of web opening modelling techniques based on an equivalent reduced web thickness concept and a numerical method for predicting the elastic buckling moments of LSBs with circular web openings. The proposed numerical method was based on a formulation of the total potential energy of LSBs with circular web openings. The accuracy of the proposed method’s use with the aforementioned modelling techniques was verified through comparison of its results with those of finite strip and finite element analyses of various LSBs.

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ID Code: 49375
Item Type: Journal Article
Refereed: Yes
Additional URLs:
Keywords: Cold-formed steel structures, Mono-symmetric beams, LiteSteel beams, Web openings, Equivalent reduced web thickness, Elastic lateral distortional buckling, Numerical method
DOI: 10.1016/j.tws.2011.01.003
ISSN: 1879-3223
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Structural Engineering (090506)
Divisions: Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2011 Elsevier Ltd.
Copyright Statement: this is the author’s version of a work that was accepted for publication in Thin-Walled Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Thin-Walled Structures, [VOL 49, ISSUE 6, 2011 DOI 10.1016/j.tws.2011.01.003
Deposited On: 28 Mar 2012 02:19
Last Modified: 25 Aug 2013 05:29

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