Structural behaviour and fire design of duplex and ferritic stainless steel CHS stub columns

Mohammed, Asif; Cashell, Katherine A.

Abstract

This paper investigates the structural behaviour and design of duplex and ferritic stainless steel stub columns with a circular hollow cross-section (CHS) at elevated temperature. A numerical model is developed to supplement the limited test results on stainless steel CHS stub columns in the literature. Following validation, the numerical approach is employed to gain an understanding of the critical behavioural characteristics which have not previously been studied. In addition, the paper considers and extends the continuous strength method (CSM) to include duplex and ferritic stainless steel for CHS stub columns in fire. The CSM employs a base curve linking the cross-section resistance to its deformation capacity and implements an elastic, linear hardening material model. The cross-sectional resistances obtained from the proposed CSM are compared with those from the numerical analysis, as well as with the standardised procedures in the European, American and Australia/New Zealand design standards. It is demonstrated that CSM can lead to more accurate and less scattered strength predictions than current design codes.

Citation

Mohammed, A., & Cashell, K. A. (2021). Structural behaviour and fire design of duplex and ferritic stainless steel CHS stub columns. International Journal of Steel Structures, 21, 1280–1291. https://doi.org/10.1007/s13296-021-00502-0

• Journal Article Type: Article
• Acceptance Date: Jun 13, 2021
• Online Publication Date: Jun 24, 2021
• Publication Date: 2021-08
• Deposit Date: Jun 25, 2021
• Publicly Available Date: Jun 28, 2021
• Journal: International Journal of Steel Structures
• Electronic ISSN: 2093-6311
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 21
• Pages: 1280–1291
• DOI: https://doi.org/10.1007/s13296-021-00502-0
• Keywords: Civil and Structural Engineering
• Public URL: https://uwe-repository.worktribe.com/output/7490749
• Additional Information: Received: 22 February 2021; Accepted: 13 June 2021; First Online: 24 June 2021