Vol. 22, No. 1, pp. 8-16 (2026)
PLASTIC ENHANCEMENT OF COLD-FORMED THIN-WALLED STEEL
FOR PREFABRICATED SUPPORT AND HANGER
Zong-Lai Peng 1, Yi-Pei Zeng 1, Ning Xu 1, Xian-Hui Yi 1, Fu-Li Liu 1, Wei Xiong 1 and Yong Cai 2, *
1 China Construction Fifth Bureau Installation Engineering Co., LTD, Shenzhen 518118, China
2 School of Civil Engineering, Central South University, Changsha 410075, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 14 March 2025; Revised: 27 June 2025; Accepted: 2 July 2025
DOI:10.18057/IJASC.2026.22.1.2
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ABSTRACT
In prefabricated support and hanger, the study of corner strength in cold-formed thin-walled steel (CFTWS) is crucial. Corners are prone to stress concentration, increasing local buckling and connection failure risks. This study analyzes the stress in the corner parts and derives the yield strength using the linear hardening model and the Von-Mises yield criterion. Based on the Prandtl-Reuss flow rule and strain superposition principle in plastic mechanics, a theoretical analysis of corner material hardening during the cold-bending process is conducted. Experiments and ABAQUS simulations are carried out to prove the effectiveness of the theoretical model. The findings reveal that the cold bending effect is relatively significant. The yield strength of the corner parts is about 79-86 MPa higher than that of the flat parts, which is equivalent to an increase of 23% to 25%. Due to the relatively low degree of anisotropy and smaller thickness measurement errors in thicker CFTWS, the theoretical formula has higher calculation accuracy for steel plates with greater thickness. In addition, in the same batch of steel produced by the same cold bending process, the yield strength of CFTWS slightly decreases with the increase of thickness.
KEYWORDS
Prefabricated support and hanger, Cold-formed thin-walled steel, Yield strength, Linear hardening model, Corner parts
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