Inelastic Lateral Buckling of Beam‐Columns
Publication: Journal of Structural Engineering
Volume 113, Issue 11
Abstract
An accurate line model based on the finite‐element method is developed for analyzing the inelastic lateral buckling of I‐section beams and beam‐columns. The prebuckling in‐plane bending is analyzed using a geometrically nonlinear finite‐element method that accounts for the effects of prebuckling displacements and residual stresses on yielding. The results of the prebuckling analysis allow the distributions of yielding and strain‐hardening throughout the beam to be determined. The out‐of‐plane flexural‐torsional buckling of the inelastic beam is analyzed by adapting an elastic tapered monosymmetric finite element. For this element, the deflections and twists are referred to an arbitrary straightline axis along the midheight of the web, instead of the shear center or centroidal axes. The elastic element is adapted for inelastic buckling by using reduced out‐of‐plane stiffnesses that allow for yielding and strainhardening. The method is used to give some indications of the accuracy of earlier studies based on less accurate assumptions.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 113 • Issue 11 • November 1987
Pages: 2259 - 2277
Copyright
Copyright © 1987 ASCE.
History
Published online: Nov 1, 1987
Published in print: Nov 1987
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