Postbuckling Analysis of Stiffened Laminated Box Columns
Publication: Journal of Engineering Mechanics
Volume 119, Issue 1
Abstract
An analytical‐numerical procedure is developed to investigate the postbuckling behavior of axially compressed, stiffened, laminated box columns. The box column is treated as a stiffened plate structure that may be idealized as an assemblage of laminated, rectangular plate strips and beams. The formulations are based on the classical laminated‐plate theory and the elementary theory of bending and torsion is used for the beam elements. The analysis uses a deflection‐type perturbation technique to determine the buckling load and the postbuckling equilibrium path, ensuring compatibility at the column corners, adding extra in‐plane terms in the strain‐displacement relations, and including shear stresses along the column corners. The effects of initial geometrical imperfections are taken into account. Numerical examples are presented that relate to the performance of perfect and imperfect, unstiffened and stiffened laminated box columns. A comparison is made with existing experimental results.
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Information
Published In
Journal of Engineering Mechanics
Volume 119 • Issue 1 • January 1993
Pages: 39 - 57
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Feb 12, 1992
Published online: Jan 1, 1993
Published in print: Jan 1993
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