Imperfection sensitivity of column instability revisited
File(s)
Accepted version
Author(s)
Girão Coelho, AM
Simão, PD
Wadee, MA
Type
Journal Article
Abstract
The buckling of columns is the classic problem in structural stability. It has been studied by many researchers over a large number of years, and it is well known that the severity of the buckling response can be greatly amplified by initial geometric imperfections in the column shape. The current paper presents and discusses the effects of imperfection shape, orientation and magnitude on the buckling behaviour of columns. Analyses are conducted for elastic columns with overall initial imperfections in the form of out-of-straightness and sway displacements, as well as local imperfections that, for instance, model constructional and material defects. Traditionally, the initial imperfections are modelled with the first buckling mode with a size selected according to fabrication tolerances. This approach will not necessarily provide a lower limit to the column prebuckling stiffness and strength. These assertions are supported by numerical results for imperfection-sensitive columns. The influence of end restraint on column strength is also studied since columns in actual frameworks are connected to other structural members such that their ends are restrained.
Date Issued
2013-09-10
Citation
Journal of Constructional Steel Research, 2013, 90, pp.265-282
ISSN
0143-974X
Publisher
ELSEVIER SCI LTD
Start Page
265
End Page
282
Journal / Book Title
Journal of Constructional Steel Research
Volume
90
Copyright Statement
© 2013 Elsevier Ltd. All rights reserved. NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Constructional Steel Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH, Vol.: 90, (2013) DOI: 10.1016/j.jcsr.2013.08.006
Description
10.04.15 KB. Ok to add accepted version to spiral, subject to 24 months embargo
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000328180500025&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Publication Status
Published