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Flexural–torsional buckling assessment of steel beam–columns through a stiffness reduction method
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Kucukler, Merih, Gardner, Leroy and Macorini, Lorenzo (2015) Flexural–torsional buckling assessment of steel beam–columns through a stiffness reduction method. Engineering Structures, 101 . pp. 662-676. doi:10.1016/j.engstruct.2015.07.041 ISSN 0141-0296.
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Official URL: http://dx.doi.org/10.1016/j.engstruct.2015.07.041
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.
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||
Journal or Publication Title: | Engineering Structures | ||||||||
Publisher: | Elsevier | ||||||||
ISSN: | 0141-0296 | ||||||||
Official Date: | 15 October 2015 | ||||||||
Dates: |
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Volume: | 101 | ||||||||
Page Range: | pp. 662-676 | ||||||||
DOI: | 10.1016/j.engstruct.2015.07.041 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||
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