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Lateral instability of steel beams in fire : behaviour, numerical modelling and design

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Kucukler, Merih (2020) Lateral instability of steel beams in fire : behaviour, numerical modelling and design. Journal of Constructional Steel Research, 170 . 106095. doi:10.1016/j.jcsr.2020.106095 ISSN 0143-974X.

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Official URL: https://doi.org/10.1016/j.jcsr.2020.106095

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Abstract

The lateral torsional buckling behaviour and design of steel beams in fire are investigated in this paper. Finite element models able to replicate the lateral-torsional buckling (LTB) response of steel beams at elevated temperatures are developed and validated. The validated finite element models are used to carry out extensive parametric studies to explore the LTB behaviour of steel beams in fire, considering various cross-section shapes, member slendernesses, steel grades, elevated temperature levels and different fabrication processes. A design equation for the LTB assessment of steel beams at elevated temperatures is developed on the basis of the results from the extensive parametric studies. The high accuracy, safety and reliability of the proposed design approach are illustrated, which is also compared against the beam design rules existing in the European structural steel fire design standard EN 1993-1-2. The design proposals made in this paper are compatible with the new LTB assessment equations that are due to be incorporated into the next version of the European room temperature structural steel design standard EN 1993-1-1 and lead to more accurate ultimate strength predictions relative to the beam buckling design equations existing in EN 1993-1-2.

Item Type: Journal Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Divisions: Faculty of Science, Engineering and Medicine > Engineering > Engineering
Library of Congress Subject Headings (LCSH): Finite element method, Finite element method -- Data processing, Reinforced concrete construction, Structural frames -- Mathematical models, Structural design , Structural design -- Computer simulation
Journal or Publication Title: Journal of Constructional Steel Research
Publisher: Elsevier Ltd.
ISSN: 0143-974X
Official Date: July 2020
Dates:
DateEvent
July 2020Published
6 May 2020Available
11 April 2020Accepted
Volume: 170
Article Number: 106095
DOI: 10.1016/j.jcsr.2020.106095
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Date of first compliant deposit: 6 May 2020
Date of first compliant Open Access: 6 May 2021

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