Design of cold-formed steel elliptical hollow section members under combined compression and biaxial bending

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	Design of cold-formed steel elliptical hollow section members under combined compression and biaxial bending
	Ye Yao 1; Wai-Meng QUACH2 ; Ben Young 3
	2024-06-05
Conference Name	The 10th International Conference on Steel and Aluminium Structures (ICSAS24), Rio de Janeiro, Brazil, 5-7 June 2024
Source Publication	Proceedings of the 10th International Conference on Steel and Aluminium Structures (ICSAS24), Rio de Janeiro, Brazil, 5-7 June 2024
Pages	1-10
Conference Date	5-7 June 2024
Conference Place	Rio de Janeiro,
Country	Brazil
Abstract	The present study investigated the global instability of cold-formed (CF) steel elliptical hollow section (EHS) members under combined compression and biaxial bending by using the numerical method. A finite element (FE) model for CF tubular members under combined compression and biaxial bending was first developed, in which the strength enhancement, geometric imperfection and residual stresses due to roll-forming were incorporated. The FE model was validated against the existing test results. The validated FE model was employed to carry out a parametric study for CF steel EHS members, which covers an extensive range of cross-section geometries, material grades (with steel grades up to 960 MPa), member slenderness, loading eccentricities and loading angles. Based on the generated FE data, the application of the current interaction design formulae for steel members under combined loading in EN 1993-1-1, together with the codified slenderness limits for circular hollow section (CHS) under combined loading, were assessed for the design of CF steel EHS members under combined compression and biaxial bending. It can be found that the design formulae in EN 1993-1-1, together with the slenderness limits for CHS, can give very conservative predictions for CF steel EHS members under combined loading. In addition, a new slenderness limit for CF steel EHS under combined loading was proposed. By adopting the new slenderness limit for CF steel EHS under combined loading, the design formulae in EN 1993-1-1 were assessed again for CF steel EHS members under combined loading, which can provide accurate and reliable predictions.
Keyword	Beam-columns Cold-forming Combined Biaxial Bending And Compression Numerical Modelling Global Instability
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
Corresponding Author Affilication	University of Macau
Recommended Citation GB/T 7714	Ye Yao,Wai-Meng QUACH,Ben Young. Design of cold-formed steel elliptical hollow section members under combined compression and biaxial bending[C], 2024, 1-10.
APA	Ye Yao., Wai-Meng QUACH., & Ben Young (2024). Design of cold-formed steel elliptical hollow section members under combined compression and biaxial bending. Proceedings of the 10th International Conference on Steel and Aluminium Structures (ICSAS24), Rio de Janeiro, Brazil, 5-7 June 2024, 1-10.

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