Moment redistribution in cold-formed steel sleeved and overlapped two-span purlin systems

Title: Moment redistribution in cold-formed steel sleeved and overlapped two-span purlin systems
Authors: Kyvelou, P
Hui, C
Gardner, L
Nethercot, DA
Item Type: Journal Article
Abstract: Cold-formed steel purlin systems with overlapped or sleeved connections are alternatives to continuous two-span systems and exhibit different degrees of continuity. Both connection types are highly favourable in practice since they are both strategically placed over an interior support to provide additional moment resistance and rotational capacity where the corresponding demands are at their largest, thus improving the overall structural efficiency. Until recently, full-scale testing has been the most common way of investigating the structural behaviour of such systems. In this study, numerical modelling, capable of capturing the complex contact interactions and instability phenomena, is employed. The developed finite element models are first validated against data from physical tests on cold-formed steel beams featuring sleeved and overlapped connections that have been previously reported in the literature. Following their validation, the models are employed for parametric studies, based on which the structural behaviour of the examined systems is explored, while the applicability of conventional plastic design as well as of a previously proposed design approach is investigated. Finally, the efficiency of these systems in terms of load-carrying capacity is compared with their equivalent continuous two-span systems.
Issue Date: 1-Dec-2018
Date of Acceptance: 1-May-2018
URI: http://hdl.handle.net/10044/1/61443
DOI: https://dx.doi.org/10.1177/1369433218774958
ISSN: 1369-4332
Publisher: Sage
Start Page: 2534
End Page: 2552
Journal / Book Title: Advances in Structural Engineering
Volume: 21
Issue: 16
Copyright Statement: © 2018 Owner. The final, definitive version of this paper has been published in Advances in Structural Engineering by Sage Publications Ltd. All rights reserved. It is available at: https://dx.doi.org/10.1177/1369433218774958
Sponsor/Funder: Commission of the European Communities
Funder's Grant Number: 743504
Keywords: Science & Technology
Technology
Construction & Building Technology
Engineering, Civil
Engineering
cold-formed steel
continuous purlin systems
finite element modelling
moment redistribution
overlapped purlins
sleeved purlins
STRESS-STRAIN CURVES
LAPPED CONNECTIONS
BEAMS
Civil Engineering
0905 Civil Engineering
Publication Status: Published
Online Publication Date: 2018-05-21
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering



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