Buckling mode interaction in prestressed stayed columns
File(s)
Author(s)
Wadee, MA
Gardner, L
Hunt, TA
Type
Journal Article
Abstract
Prestressed stayed columns offer an innovative and aesthetically attractive solution where designs demand long and slender elements under compression. The addition of cross-arms and pretensioned cables to the columns provide significant lateral and rotational support that can result in a marked increase of the buckling capacity. The current work presents a simplified model, comprising discrete rigid-links and springs with a mathematically exact formulation including the destabilizing effect of cable slackening, which mimics the response of stayed columns and reveals the governing physical parameters that drive the behaviour. A recent finite element study had indicated that these structural components are likely to exhibit interactive buckling phenomena, particularly if the critical buckling mode is antisymmetric, leading to highly unstable responses. However, by its very nature, that study could not reveal the bifurcational structure of the equilibrium response. The results from the present model reveal similar behaviour to that observed in the earlier finite element study. A sequence of bifurcations is found that switch the post-buckling response from one mode to another via a path of interactive buckling.
Date Issued
2015-05-25
Date Acceptance
2015-05-01
Citation
Proceedings of the Institution of Civil Engineers - Structures and Buildings, 2015, 166 (8), pp.403-412
ISSN
0965-0911
Publisher
Institution of Civil Engineers
Start Page
403
End Page
412
Journal / Book Title
Proceedings of the Institution of Civil Engineers - Structures and Buildings
Volume
166
Issue
8
Copyright Statement
© ICE Publishing, all rights reserved.
Sponsor
Engineering & Physical Science Research Council (E
Identifier
http://www.ice.org/
Grant Number
EP/F022182/1
Subjects
Science & Technology
Technology
Construction & Building Technology
Engineering, Civil
Engineering
cables & tendons
columns
mathematical modelling
POSTBUCKLING BEHAVIOR
0905 Civil Engineering
Publication Status
Published
Date Publish Online
2015-05-25