TY - JOUR
T1 - Strength enhancement and stub-column behavior of cold-formed stainless steel elliptical hollow sections
AU - Yao, Ye
AU - Quach, Wai Meng
AU - Young, Ben
N1 - Funding Information:
The authors would like to thank The Science and Technology Development Fund (FDCT), Macao S.A.R. (File no. 0088/2022/A , and File no. 073/2015/A2 ), the University of Macau, Macau Special Administrative Region (File no. MYRG2018-00099-FST ), and the Fundamental Research Funds for the Central Universities, China (No. N2301016 ) for their financial support.
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/8
Y1 - 2023/8
N2 - This paper aims to investigate the strength enhancement, local geometric imperfections, and stub-column behavior of cold-formed (CF) stainless steel elliptical hollow sections (EHS) by using finite element methods. In the present study, an advanced numerical approach was used to conduct a comprehensive parametric study for CF stainless steel EHS with a wide range of cross-section dimensions and slenderness values as well as different stainless steel alloys. By analyzing the generated numerical data from the parametric study, the effects of cold-forming and material parameters on the strength enhancement were examined. Predictive models of the strength enhancement as well as the local geometric imperfections for CF stainless steel EHS are proposed. The slenderness limits for CF stainless steel circular hollow sections (CHS) and CF steel EHS in the existing design methods were assessed for CF stainless steel EHS. New slenderness limits are proposed for CF stainless steel EHS. In addition, the existing equivalent diameter method, the Continuous Strength Method (CSM) and the Direct Strength Method (DSM) were evaluated for the design of CF stainless steel EHS. Modifications on these existing design methods are proposed for CF stainless steel EHS, which can improve their accuracy.
AB - This paper aims to investigate the strength enhancement, local geometric imperfections, and stub-column behavior of cold-formed (CF) stainless steel elliptical hollow sections (EHS) by using finite element methods. In the present study, an advanced numerical approach was used to conduct a comprehensive parametric study for CF stainless steel EHS with a wide range of cross-section dimensions and slenderness values as well as different stainless steel alloys. By analyzing the generated numerical data from the parametric study, the effects of cold-forming and material parameters on the strength enhancement were examined. Predictive models of the strength enhancement as well as the local geometric imperfections for CF stainless steel EHS are proposed. The slenderness limits for CF stainless steel circular hollow sections (CHS) and CF steel EHS in the existing design methods were assessed for CF stainless steel EHS. New slenderness limits are proposed for CF stainless steel EHS. In addition, the existing equivalent diameter method, the Continuous Strength Method (CSM) and the Direct Strength Method (DSM) were evaluated for the design of CF stainless steel EHS. Modifications on these existing design methods are proposed for CF stainless steel EHS, which can improve their accuracy.
KW - Cold-forming
KW - Elliptical hollow section
KW - Numerical modeling
KW - Stainless steel
KW - Strength enhancement
KW - Stub column behavior
UR - http://www.scopus.com/inward/record.url?scp=85163006740&partnerID=8YFLogxK
U2 - 10.1016/j.tws.2023.110939
DO - 10.1016/j.tws.2023.110939
M3 - Journal article
AN - SCOPUS:85163006740
SN - 0263-8231
VL - 189
JO - Thin-Walled Structures
JF - Thin-Walled Structures
M1 - 110939
ER -