Lateral Distortional Buckling of Monosymmetric Beams under Point Load
Publication: Journal of Engineering Mechanics
Volume 122, Issue 10
Abstract
Based on a new expression for the work done due to buckling, a computationally efficient method is presented for the lateral distortional buckling of monosymmetric beams. The method requires a knowledge of the stress distribution in the beam. For a simply supported monosymmetric beam subjected to a concentrated vertical load, a simplified stress distribution is assumed and the Rayleigh-Ritz method is used to analyze the lateral distortional buckling behavior. When distortion of the web is suppressed, the present approach agrees with the classical energy methods. However, for short beams and for concentrated loads, web distortion becomes important and the classical methods seriously overestimate the critical load. Other methods that have allowed for web distortion have been limited to end moments (or a cantilever), whereas this method can deal with any type of load including concentrated loads. The accuracy of the method is verified by results obtained from ABAQUS.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 122 • Issue 10 • October 1996
Pages: 1022 - 1029
Copyright
Copyright © 1996 American Society of Civil Engineers.
History
Published online: Oct 1, 1996
Published in print: Oct 1996
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