Experimental and numerical study of hot-rolled duplex stainless steel CHS columns

Keyang Ning, Lu Yang, Jie Wang, Peng Dai, Yinan Sun

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Stainless steel circular hollow section (CHS) members have been widely used in building structures because of their comparable strength to structural carbon steels, attractive appearance and excellent corrosion resistance. However, research on stainless steel CHS members has been limited to cold-formed members, whereas hot-rolled CHS columns have received less attention. To this end, the flexural buckling performance of hot-rolled duplex stainless steel CHS columns was investigated by a comprehensive experimental and numerical programme. A total of seven hot-rolled duplex stainless steel CHS columns covering two cross-sectional sizes with varying lengths have been tested under compression. Based on the test results, finite element (FE) models were developed and used in parametric studies to generate data points with a wider range of geometric dimensions. Comparing the test and FE results with current design guidance, it was found that the Chinese standard, CECS 410, and North American design guidance, AISC DG 27, underestimate significantly the flexural buckling resistance of such columns, while the design method in Eurocode 3: Part 1–4 might be unsafe in predicting the resistances for low slenderness values. New column buckling curves based on the Eurocode 3 and AISC DG 27 design formulae with improved accuracy and reduced scatters were also proposed and validated through careful reliability analysis.

Original languageEnglish
Article number106579
JournalJournal of Constructional Steel Research
Early online date20 Feb 2021
Publication statusPublished - 31 May 2021

Bibliographical note

Funding Information:
This work was supported by the Beijing Excellent Talent Training Support (Grant No. 2017000026833ZK26 ), and National Natural Science Foundation of China (Grant No. 51922001 and 51421005 ).

Publisher Copyright:
© 2021 Elsevier Ltd

Copyright 2021 Elsevier B.V., All rights reserved.


  • Circular hollow section
  • Design method
  • Flexural buckling
  • Hot-rolled
  • Stainless steel

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Metals and Alloys


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