Geometric factors affecting I-section struts experiencing local and strong-axis global buckling mode interaction

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Title: Geometric factors affecting I-section struts experiencing local and strong-axis global buckling mode interaction
Authors: Liu, EL
Wadee, MA
Item Type: Journal Article
Abstract: A recent analytical model describing the post-buckling behaviour of an I-section strut experiencing strong axis global–local buckling interaction is extended to investigate the effects of modifying the strut geometry. Using a combination of analytical and finite element (FE) methods, the global and local slendernesses are varied parametrically, in turn, to determine the geometries leading to regions of interactive behaviour. The effect of stress relieved initial global imperfections are also investigated. It is observed that the strut can exhibit one of five distinct post-buckling behaviours, the geometries for which are identified. The strut can exhibit global buckling only, local buckling only, global–local buckling interaction with either the global or local mode being triggered first or the most severe case where both global and local buckling modes are triggered simultaneously. The strut is found to be highly sensitive to initial imperfections in the interactive region; the implications for imperfection sensitivity on the design and the practical use of such components are discussed.
Issue Date: 15-Oct-2016
Date of Acceptance: 7-Oct-2016
ISSN: 0263-8231
Publisher: Elsevier
Start Page: 319
End Page: 331
Journal / Book Title: Thin-Walled Structures
Volume: 109
Copyright Statement: © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Sponsor/Funder: Engineering and Physical Sciences Research Council
Keywords: Civil Engineering
0901 Aerospace Engineering
0905 Civil Engineering
0913 Mechanical Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering

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