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Mode interaction in triple-bay prestressed stayed columns

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Title: Mode interaction in triple-bay prestressed stayed columns
Authors: Yu, J
Wadee, MA
Item Type: Journal Article
Abstract: Prestressed stayed columns are an innovative type of structural system where the compressive load-carrying capacity can be enhanced through prestressed external cable stays. A nonlinear analytical model for prestressed stayed columns with multiple crossarm systems along the column length, based on the Rayleigh Ritz method, is presented that capture modal interactions for perfect geometries explicitly for the first time. It is demonstratedcthat the theoretical compressive strength enhancements under certain configurations canconly be obtained at the expense of triggering a sequence of destabilizing bifurcations. This can give rise to dangerously unstable interactive post-buckling behaviour in luding so-called "mode jumping" and "snaking" phenomena. Parametric spaces where the system is most susceptible to the modal interactions are identified and it is for those configurations that the system is likely to be highly sensitive to initial imperfections. The model is validated using a nonlinear nite element model formulated within the commercial code ABAQUS and excellent comparisons are obtained.
Issue Date: 1-Jan-2017
Date of Acceptance: 24-Oct-2016
URI: http://hdl.handle.net/10044/1/41934
DOI: 10.1016/j.ijnonlinmec.2016.10.012
ISSN: 1878-5638
Publisher: Elsevier
Start Page: 47
End Page: 66
Journal / Book Title: International Journal of Non-Linear Mechanics
Volume: 88
Issue: 1
Copyright Statement: © 2016, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Technology
Mechanics
Interactive and cellular buckling
Mode jumping
Analytical and finite element modelling
Prestressing
POSTBUCKLING BEHAVIOR
IMPERFECTIONS
ASYMPTOTICS
STABILITY
STRUTS
0102 Applied Mathematics
0905 Civil Engineering
0913 Mechanical Engineering
Mechanical Engineering & Transports
Publication Status: Published
Online Publication Date: 2016-10-26
Appears in Collections:Civil and Environmental Engineering
Faculty of Engineering