Ultimate behaviour of steel beams with discrete lateral restraints

Title: Ultimate behaviour of steel beams with discrete lateral restraints
Authors: Foster, ASJ
Gardner, L
Item Type: Journal Article
Abstract: Through a programme of experiments, numerical modelling and parametric studies, the implications of allowing for strain-hardening in the design of laterally restrained steel beams is investigated with particular emphasis on the performance of the bracing elements. A total of twelve tests were performed on simply supported beams considering two basic scenarios: discrete rigid restraints and discrete elastic restraints of varying stiffness. In the latter case, the forces developed in the restraints were measured and compared to the design forces specified in EN 1993-1-1 (2005). Two different restraint spacings were considered in the tests to give non-dimensional lateral torsional slenderness values of 0.3 and 0.4 for the unrestrained lengths. In all tests, bending resistances in excess of the plastic moment capacity were observed, but for the considered restraint spacings, the resistances often fell short of that predicted by the deformation-based continuous strength method (CSM), which allows for strain-hardening. It was concluded that closer restraint spacing may be required to harness significant benefit from strain-hardening and to develop the full CSM bending resistance, though the forces generated in the restraints were within current code requirements.
Issue Date: 1-Nov-2013
Date of Acceptance: 15-Jun-2013
URI: http://hdl.handle.net/10044/1/62139
DOI: https://dx.doi.org/10.1016/j.tws.2013.06.009
ISSN: 0263-8231
Publisher: ELSEVIER SCI LTD
Start Page: 88
End Page: 101
Journal / Book Title: THIN-WALLED STRUCTURES
Volume: 72
Copyright Statement: © 2013 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Technology
Engineering, Civil
Engineering
Bending
Experiments
Lateral torsional buckling
Steel structures
Strain hardening
Testing
DESIGN
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Civil Engineering
Publication Status: Published
Online Publication Date: 2013-07-20
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering



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