Design of steel beams with discrete lateral restraints.
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. https://doi.org/10.1016/j.jcsr.2012.09.011
|Authors||McCann, F, Gardner, L and Wadee, A|
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.
|Keywords||0905 Civil Engineering; Civil Engineering|
|Journal||Journal of Constructional Steel Research|
|Journal citation||80, pp. 82-90|
|Digital Object Identifier (DOI)||https://doi.org/10.1016/j.jcsr.2012.09.011|
|26 Oct 2012|
|Publication process dates|
|Deposited||05 Jul 2017|
|Accepted||19 Sep 2012|
|Accepted author manuscript|
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