Research Article
Jan 1972
Post-Buckling of Geometrically Imperfect Plates
Authors: Ralph G. Dawson and Alastair C. WalkerAuthor Affiliations
Publication: Journal of the Structural Division
Volume 98, Issue 1
Abstract
Explicit expressions are derived for the collapse and elastic post-buckling of simply supported, geometrically imperfect plates with stress-free edges. For the purposes of design, such plates can be taken as representative of the stiffened compression elements of thin-walled structural sections. Different generalized geometric imperfection parameters are studied and the effects compared to established test data obtained from cold-formed steel sections subjected to either bending or compression. For these sections a suitable and completely general parameter describing the imperfection amplitude, e0t, of a plate of thickness t is shown to be e0=0.2σy/σcr in which σy is the yield strength of the plate material; σcr is the theoretical local buckling stress of the equivalent ideal plate and is a direct function of its width to thickness ratio. This parameter is recommended for the design of cold-formed steel sections against local buckling.
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Information
Published In
Journal of the Structural Division
Volume 98 • Issue 1 • January 1972
Pages: 75 - 94
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: Jan 1972
Published online: Feb 1, 2021
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Authors
Affiliations
Ralph G. Dawson
Sr. Structural Engr., Dexion-Comino International Ltd., London, and Hon. Research Asst., University College, London, England
Alastair C. Walker
Lecturer, Dept. of Civ. Engrg., University College, London, England
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