Design of steel beams with discrete lateral restraints.

Journal article


McCann, F, Gardner, L and Wadee, A (2012). Design of steel beams with discrete lateral restraints. Journal of Constructional Steel Research. 80, pp. 82-90.
AuthorsMcCann, F, Gardner, L and Wadee, A
Abstract

Discrete lateral restraints offer an effective means of stabilising beams against lateral-torsional buckling. Design expressions for simply-supported beams braced regularly along their span with elastic restraints, based on analytically-derived formulae, are presented herein. These include the minimum restraint stiffness required to force the beam to buckle in between the restraint nodes and the forces induced in the restraints, along with a brief treatment of the critical moment of the beam. It is demonstrated that there is close agreement between the values obtained from the design formulae and their original analytical counterparts. These are also compared with the results from design formulae based on analogous column behaviour, an approach commonly used in design codes. It is found that the column rules used by design codes return values that, when compared with the results of the current analysis, are overly conservative for cases where the restraints are positioned at the compression flange of the beam but unsafe for restraints positioned at the shear centre.

Keywords0905 Civil Engineering; Civil Engineering
Year2012
JournalJournal of Constructional Steel Research
Journal citation80, pp. 82-90
PublisherElsevier
ISSN1873-5983
Digital Object Identifier (DOI)doi:10.1016/j.jcsr.2012.09.011
Publication dates
Print26 Oct 2012
Publication process dates
Deposited05 Jul 2017
Accepted19 Sep 2012
Accepted author manuscript
License
CC BY-NC-ND 4.0
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https://openresearch.lsbu.ac.uk/item/8795x

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