Ultimate behaviour of continuous steel beams with discrete lateral restraints

Title: Ultimate behaviour of continuous 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 continuous steel beams are investigated with particular emphasis on the performance of the bracing elements. A total of six tests were performed on continuous 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) for members containing rotated plastic hinges. 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 predicted by the deformation-based continuous strength method (CSM) were exceeded. Using a standardised numerical model validated against the laboratory test data, a series of parametric studies were conducted; it was concluded that elastic restraints for members containing rotated plastic hinges should be designed to sustain higher forces than required for traditional plastic design if the full CSM collapse load is to be achieved.
Issue Date: 1-Mar-2015
Date of Acceptance: 10-Nov-2014
URI: http://hdl.handle.net/10044/1/62140
DOI: https://dx.doi.org/10.1016/j.tws.2014.11.018
ISSN: 0263-8231
Start Page: 58
End Page: 69
Volume: 88
Copyright Statement: © 2014 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
Engineering, Civil
Continuous beams
Lateral restraint forces
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Civil Engineering
Publication Status: Published
Online Publication Date: 2014-12-18
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering

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