Strength enhancement and cross-section behavior of cold-formed steel elliptical hollow sections with steel grades up to 960MPa

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	Strength enhancement and cross-section behavior of cold-formed steel elliptical hollow sections with steel grades up to 960MPa
	Ye Yao1,2 ; Wai-Meng QUACH2 ; Ben Young 3
	2023-12-05
Conference Name	The Eleventh International Conference on Advances in Steel Structures (ICASS’2023), Kuching, Sarawak, Malaysia, 5-7 December 2023
Source Publication	Proceedings of the Eleventh International Conference on Advances in Steel Structures (ICASS’2023), Kuching, Sarawak, Malaysia, 5-7 December 2023
Pages	420-435
Conference Date	5-7 December 2023
Conference Place	Kuching, Sarawak, Malaysia
Country	Malaysia
Abstract	This paper aims to numerically investigate the local geometric imperfections, strength enhancement and cross-section response of cold-formed (CF) steel elliptical hollow sections (EHS) with steel grades up to 960MPa. In this paper, an advanced finite element (FE) stub column model of CF steel tubes is presented, in which strength enhancement, residual stresses, geometric imperfections resulting from cold-forming are predicted by using a rigorous FE simulation of roll-forming. This FE model was validated against test results. By using this validated FE model, a parametric study on the stub-column response of CF steel EHS was then conducted for a wide range of section sizes and steel grades (up to steel grade of 960MPa). Based on the generated FE data, predictive models for the strength enhancement and local imperfections of CF steel EHS are proposed. The cross-section classification for CF steel EHS were also examined according to the slenderness limits of circular hollow sections (CHS) in the existing design codes. Finally, a new yield slenderness limit for CF steel EHS is proposed.
Keyword	Local Buckling Design Method Cold-formed Elliptical Hollow Sections Cross-section Capacity
Language	英語English
Document Type	Conference paper
Collection	DEPARTMENT OF CIVIL AND ENVIRONMENTAL ENGINEERING
Corresponding Author	Wai-Meng QUACH
Affiliation	1.School of Resources and Civil Engineering, Northeastern University, Shenyang, China 2.Department of Civil and Environmental Engineering, University of Macau, Macau, China 3.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
First Author Affilication	University of Macau
Corresponding Author Affilication	University of Macau
Recommended Citation GB/T 7714	Ye Yao,Wai-Meng QUACH,Ben Young. Strength enhancement and cross-section behavior of cold-formed steel elliptical hollow sections with steel grades up to 960MPa[C], 2023, 420-435.
APA	Ye Yao., Wai-Meng QUACH., & Ben Young (2023). Strength enhancement and cross-section behavior of cold-formed steel elliptical hollow sections with steel grades up to 960MPa. Proceedings of the Eleventh International Conference on Advances in Steel Structures (ICASS’2023), Kuching, Sarawak, Malaysia, 5-7 December 2023, 420-435.

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