Research Article
Nov 1972
Buckling of Inelastic I-Beams under Uniform Moment
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VIEW THE REPLYPublication: Journal of the Structural Division
Volume 98, Issue 11
Abstract
Many different theoretical models have been proposed for the flexural-torsional buckling of inelastic steel beams under uniform moment. These models are considered and what is argued to be a more accurate model is proposed, which is based on the tangent modulus theory of buckling, which uses the strain-hardening moduli for the inelastic material, and which accounts for residual stresses. The predictions for this model for a W 8 x 31 beam are compared with those for the previous models and the relative significance of the assumptions are determined. It is found that the critical moment of the beam is not very sensitive to the assumptions concerning the moduli of the inelastic material, but that the effects of monosymmetry induced by the residual stresses should be accounted for. The most important assumptions are found to be those of the magnitude and distribution of the residual stresses, which cause significant variations in the strength of the beam.
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Published In
Journal of the Structural Division
Volume 98 • Issue 11 • November 1972
Pages: 2551 - 2566
Copyright
© 1972 American Society of Civil Engineers.
History
Published in print: Nov 1972
Published online: Feb 1, 2021
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Authors
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Nicholas S. Trahair, AM.ASCE
Assoc. Prof. in Civ. Engrg., Univ. of Sydney, Sydney, Australia
Sritawat Kitipornchai, AM.ASCE
Research Student, Univ. of Sydney, Sydney, Australia
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.