10.33: Flexural buckling behaviour of high strength steel columns under fire conditions. (13th September 2017)

• Record Type: Journal Article
• Authors: Winful, Dorothy A.; Afshan, Sheida; Cashell, Katherine A.; Barnes, Adrienne M.; Pargeter, Richard J.
• Is Part Of: Ce/papers. Volume 1:issue 2/3(2017)
• Page Start: 2797
• Page End: 2805
• Publication Date: 2017-09-13
• Subjects: high strength steel -- fire -- buckling response -- EN 1993‐1‐2; Civil engineering -- Periodicals; 624
• DOI: 10.1002/cepa.330
• Languages: English
• ISSNs: 2509-7075

Abstract

ABSTRACT: In this paper, a numerical modelling study using the finite element (FE) analysis package ABAQUS [1] has been carried out to study the flexural behaviour of square and rectangular hollow section columns made from high strength steel (HSS) grades S690QL and S700MC at temperatures up to 800°C. The FE model was validated using existing experimental data and then parametric studies were performed on columns with varying length and cross‐sectional properties. The results have been compared with recommendations given in Eurocode 3 Part 1–2 [2]. The analyses showed that the Eurocode is generally conservative with respect to the buckling coefficients derived and safely predicts the buckling behaviour resistance of columns made from S700MC and suggest a lower buckling curve may be needed for S690QL. It was also shown that the 0.2% proof stress rather than the stress at 2% total strain is a better parameter for deriving buckling curves in fire.