Local buckling resistances of cold-formed high-strength steel SHS and RHS with varying corner radius

Lu Yang, Fei Yin, Jie Wang, Azrat Bilal, Ari Habeeb Ahmed, Manfang Lin

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This paper reports an experimental and numerical study of the cross-sectional behaviour of cold-formed high-strength steel (HSS) square and rectangular hollow section (SHS and RHS) members. Six stub column tests, six 3-point and three 4-point bending tests have been carried out, followed by the development of accurate finite element (FE) models and a parametric study. Based on the test and FE results, the design rules for slender cross-sections in European, American, Australian and Chinese standards and the GSRM method have been assessed via reliability analyses. A new equation for deriving the cross-sectional slenderness of SHS and RHS considering the influence of corner radius and new area reduction factors for designing slender cold-formed S900 (and above) SHS and RHS have also been proposed
Original languageEnglish
Article number108909
JournalThin-Walled Structures
Early online date29 Jan 2022
Publication statusPublished - 31 Mar 2022

Bibliographical note

Funding Information:
The authors acknowledge the International Program for Graduate Students at Beijing University of Technology , and National Nature Science Foundation of China (Grant No. 51922001 ), from which the research of this paper was conducted. The authors also would like to acknowledge the world-leading steel manufacturer SSAB (Finland) for the supply of the high strength steel specimens. Mr William Bazeley, the leading technician in the Structures Lab at the University of Bath, is specifically acknowledged for his kind help in setting up the experiments and training support for the students.


  • 3-point bending tests
  • 4-point bending tests
  • Cold-formed steel structures
  • Effect of corner radius
  • High strength steels
  • Local buckling
  • Square and rectangular hollow sections (SHS and RHS)
  • Stub column tests

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanical Engineering


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