Vol. 20, No. 3, pp. 266-279 (2024)
BEHAVIOR AND DESIGN OF COLD-FORMED SQUARE AND
RECTANGULAR HOLLOW SECTIONS BASED ON EFFECTIVE
PLASTIC WIDTH METHOD
Shuo Ren 1, Xin Cheng 1, *, Xia-Xin Wang 2 and Li-Jun Zhuang 3
1 Department of Civil Engineering, Taiyuan University of Technology, Taiyuan, 030024, China
2 School of Civil Engineering, Southeast University, Nanjing, 210096, China
3 China Shanxi Sijian Group Co., Ltd., Taiyuan, 030006, China
*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 26 July 2023; Revised:22 February 2024; Accepted: 23 February 2024
DOI:10.18057/IJASC.2024.20.3.6
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ABSTRACT
Due to the rapid development of cold-forming technology, the application of cold-formed steel members with square hollow sections (SHS) and rectangular hollow sections (RHS) in constructing steel structures is increasingly developing. For practical application, it is of great significance to study the ultimate behavior of cold-formed SHS and RHS steel tubes with different plate thicknesses systematically. In this paper, finite element models considering initial geometric defects, residual stress, and cold-formed effect were established and validated against available test data. Parametric analysis was then conducted considering various width-to-thickness ratios of flange and web and axial force ratios. The influences of the parameters on the ultimate capacity, failure mechanism, and stress development were carefully explored using the results of parametric analysis. The effective plastic width method (EPM) was introduced to calculate the ultimate capacity, taking strain hardening, interactive effect of the plates, and local buckling into account. Finally, the accuracy of EPM was verified through comparison with current specifications and parametric analysis results.
KEYWORDS
Ultimate capacity, Cold-formed SHS and RHS, Effective plastic width method, Parametric analysis, Interactive effect of plates
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