Verification of Simplified Inelastic Models of 3‐D Behavior
Publication: Journal of Engineering Mechanics
Volume 116, Issue 7
Abstract
This paper investigates the accuracy of a simplified model for the description of elastic‐plastic response of wide flange shapes under three‐dimensional loading. The model uses the average effect of moment‐axial force curvature equations in each bending direction to compute the terms in the element stiffness matrix. While this approach is exact for planar response computations, it is an approximation in describing three‐dimensional response. Another problem that arises for rolled shapes is that the model must describe the effect of differential bending on the member's response. This is accomplished by using the elastic stress variation to measure the extent of flange yielding. A large deflection, displacement‐control procedure is used to compute the elastic‐plastic‐failure load of the system and trace the unloading path. Comparison with analytical and experimental work on flexural‐torsional buckling of columns is used to verify the accuracy of the proposed model. Agreement with previously published results is excellent.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 116 • Issue 7 • July 1990
Pages: 1580 - 1598
Copyright
Copyright © 1990 ASCE.
History
Published online: Jul 1, 1990
Published in print: Jul 1990
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