Flexural–torsional buckling assessment of steel beam-columns through a stiffness reduction method

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Title: Flexural–torsional buckling assessment of steel beam-columns through a stiffness reduction method
Authors: Kucukler, M
Gardner, L
Macorini, L
Item Type: Journal Article
Abstract: In this paper, a stiffness reduction method for the flexural–torsional buckling assessment of steel beam–columns subjected to major axis bending and axial compression is presented. The proposed method is applied by reducing the Young’s E and shear G moduli through the developed stiffness reduction functions and performing Linear Buckling Analysis. To account for second-order forces induced prior to buckling, the in-plane (in the plane of bending) and out-of-plane analyses of a member are separated and stiffness reduction for the out-of-plane instability assessment is applied on the basis of member forces determined from the in-plane analysis. Since the developed stiffness reduction functions fully take into account the detrimental influence of imperfections and spread of plasticity, the proposed method does not require the use of member design equations, thus leading to practical design. For the purpose of verifying this approach, the strength predictions determined through the proposed stiffness reduction method are compared against those obtained from nonlinear finite element modelling for a large number of regular, irregular, single and multi-span beam–columns.
Issue Date: 13-Aug-2015
Date of Acceptance: 27-Jul-2015
URI: http://hdl.handle.net/10044/1/38985
DOI: http://dx.doi.org/10.1016/j.engstruct.2015.07.041
ISSN: 1873-7323
Publisher: Elsevier
Start Page: 662
End Page: 676
Journal / Book Title: Engineering Structures
Volume: 101
Copyright Statement: © 2015 Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Keywords: Science & Technology
Engineering, Civil
Stiffness reduction
Flexural-torsional buckling
Steel beam-columns
Inelastic buckling
Civil Engineering
0905 Civil Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering

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