Lateral-torsional buckling assessment of steel beams through a stiffness reduction method

Title: Lateral-torsional buckling assessment of steel beams through a stiffness reduction method
Authors: Kucukler, M
Gardner, L
Macorini, L
Item Type: Journal Article
Abstract: This paper presents a stiffness reduction approach utilising Linear Buckling Analysis (LBA) with developed stiffness reduction functions for the lateral–torsional buckling (LTB) assessment of steel beams. A stiffness reduction expression is developed for the LTB assessment of beams subjected to uniform bending and modified for the consideration of moment gradient effects on the development of plasticity. The proposed stiffness reduction method considers the influence of imperfections and plasticity on the response through the reduction of the Young's modulus E and shear modulus G and obviates the need of using LTB buckling curves in design. The accuracy and practicality of the method are illustrated for regular, irregular, single and multi-span beams. In all of the considered cases, the proposed method is verified against the results obtained through nonlinear finite element modelling.
Issue Date: 20-Mar-2015
Date of Acceptance: 26-Feb-2015
ISSN: 0143-974X
Publisher: Elsevier
Start Page: 87
End Page: 100
Journal / Book Title: Journal of Constructional Steel Research
Volume: 109
Copyright Statement: © 2015 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Keywords: Science & Technology
Construction & Building Technology
Engineering, Civil
Stiffness reduction
Lateral-torsional buckling
Steel beams
Inelastic buckling
0905 Civil Engineering
Civil Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering

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