An approximate model for optimizing Bernoulli columns against buckling

Ruocco, E., Wang, C. M., Zhang, H. and Challamel, N. (2017) An approximate model for optimizing Bernoulli columns against buckling. Engineering Structures, 141 316-327. doi:10.1016/j.engstruct.2017.01.077

Author Ruocco, E.
Wang, C. M.
Zhang, H.
Challamel, N.
Title An approximate model for optimizing Bernoulli columns against buckling
Journal name Engineering Structures   Check publisher's open access policy
ISSN 1873-7323
Publication date 2017-06-15
Sub-type Article (original research)
DOI 10.1016/j.engstruct.2017.01.077
Open Access Status Not yet assessed
Volume 141
Start page 316
End page 327
Total pages 12
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Language eng
Subject 2205 Civil and Structural Engineering
Abstract Proposed herein is a simple but powerful method for optimization of inhomogeneous, elastically restrained columns against buckling when subjected to both compressive concentrated and distributed axial loads that include self-weight. Unlike previously published studies on the subject, we do not have to specify any prescribed geometrical variation and analysis may be readily performed on columns with any complex geometrical shape. In the proposed method, the differential equation governing the buckling of Euler columns is discretized by adopting the Hencky bar-chain model, and critical buckling loads are evaluated by seeking the lowest eigenvalue of the resulting system of algebraic equations. The discrete nature of the formulation, as well as the reduced number of parameters to be optimized, is well suited for the adopted optimization process that is based on evolutionary algorithms. We propose an optimization scheme based on a parallel genetic algorithm. A comparison study between the obtained optimal column shape and buckling loads on homogeneous and isotropic columns with circular cross section, and the numerical and analytical solutions found in the open literature shows fast convergence, high accuracy and flexibility of the proposed method.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Civil Engineering Publications
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