A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Numerical investigation and design of cold-formed lean duplex stainless steel Z-sections undergoing web crippling
https://orcid.org/0000-0001-9421-738X
https://orcid.org/0000-0002-2295-8725
Abstract This paper presents a numerical investigation on web crippling of cold-formed lean duplex stainless steel Z-sections under concentrated bearing loads. The two concentrated loading conditions are End-Two-Flange (ETF) and Interior-Two-Flange (ITF) as specified in North American Specification. The numerical models were firstly validated against the test results obtained from the literature. After successful verification, the models were used to perform a comprehensive parametric study. The critical parameters that affect the web crippling strength were considered and investigated, including web flat height-to-web thickness ratio, bearing length-to-web thickness ratio, inside bent radius-to-web thickness ratio, and bearing length-to-web flat height ratio. The numerical results were used to assess the current codified design rules from American Specification, Eurocode and North American Specification. It was found that these design specifications could not predict well the web crippling strengths of cold-formed lean duplex stainless steel Z-sections under the two loading conditions. Therefore, two design equations were proposed, including the modified unified equation and the Direct Strength Method (DSM). It is shown that the two proposed design equations generally provide more accurate and reliable strength predictions than the current codified design equations. Hence, the two proposed equations are recommended for the web crippling design of cold-formed lean duplex stainless steel Z-sections subjected to ETF and ITF loading conditions.
Highlights Web crippling of stainless steel Z-sections was investigated by FE analysis. The End-Two-Flange and Interior-Two-Flange loading conditions were considered. A total of FE 282 specimens was analysed in the parametric study. Codified strengths predictions are either unconservative or conservative. More accurate and reliable design equations were proposed.
Numerical investigation and design of cold-formed lean duplex stainless steel Z-sections undergoing web crippling
https://orcid.org/0000-0001-9421-738X
https://orcid.org/0000-0002-2295-8725
Abstract This paper presents a numerical investigation on web crippling of cold-formed lean duplex stainless steel Z-sections under concentrated bearing loads. The two concentrated loading conditions are End-Two-Flange (ETF) and Interior-Two-Flange (ITF) as specified in North American Specification. The numerical models were firstly validated against the test results obtained from the literature. After successful verification, the models were used to perform a comprehensive parametric study. The critical parameters that affect the web crippling strength were considered and investigated, including web flat height-to-web thickness ratio, bearing length-to-web thickness ratio, inside bent radius-to-web thickness ratio, and bearing length-to-web flat height ratio. The numerical results were used to assess the current codified design rules from American Specification, Eurocode and North American Specification. It was found that these design specifications could not predict well the web crippling strengths of cold-formed lean duplex stainless steel Z-sections under the two loading conditions. Therefore, two design equations were proposed, including the modified unified equation and the Direct Strength Method (DSM). It is shown that the two proposed design equations generally provide more accurate and reliable strength predictions than the current codified design equations. Hence, the two proposed equations are recommended for the web crippling design of cold-formed lean duplex stainless steel Z-sections subjected to ETF and ITF loading conditions.
Highlights Web crippling of stainless steel Z-sections was investigated by FE analysis. The End-Two-Flange and Interior-Two-Flange loading conditions were considered. A total of FE 282 specimens was analysed in the parametric study. Codified strengths predictions are either unconservative or conservative. More accurate and reliable design equations were proposed.
Numerical investigation and design of cold-formed lean duplex stainless steel Z-sections undergoing web crippling
https://orcid.org/0000-0001-9421-738X
https://orcid.org/0000-0002-2295-8725
Abstract This paper presents a numerical investigation on web crippling of cold-formed lean duplex stainless steel Z-sections under concentrated bearing loads. The two concentrated loading conditions are End-Two-Flange (ETF) and Interior-Two-Flange (ITF) as specified in North American Specification. The numerical models were firstly validated against the test results obtained from the literature. After successful verification, the models were used to perform a comprehensive parametric study. The critical parameters that affect the web crippling strength were considered and investigated, including web flat height-to-web thickness ratio, bearing length-to-web thickness ratio, inside bent radius-to-web thickness ratio, and bearing length-to-web flat height ratio. The numerical results were used to assess the current codified design rules from American Specification, Eurocode and North American Specification. It was found that these design specifications could not predict well the web crippling strengths of cold-formed lean duplex stainless steel Z-sections under the two loading conditions. Therefore, two design equations were proposed, including the modified unified equation and the Direct Strength Method (DSM). It is shown that the two proposed design equations generally provide more accurate and reliable strength predictions than the current codified design equations. Hence, the two proposed equations are recommended for the web crippling design of cold-formed lean duplex stainless steel Z-sections subjected to ETF and ITF loading conditions.
Highlights Web crippling of stainless steel Z-sections was investigated by FE analysis. The End-Two-Flange and Interior-Two-Flange loading conditions were considered. A total of FE 282 specimens was analysed in the parametric study. Codified strengths predictions are either unconservative or conservative. More accurate and reliable design equations were proposed.
Numerical investigation and design of cold-formed lean duplex stainless steel Z-sections undergoing web crippling
Zhou, Feng (author) / Chhun, Nakhelin (author) / Cai, Yancheng (author)
Thin-Walled Structures ; 183
2022-10-29
Article (Journal)
Electronic Resource
English
Web Crippling of Cold-Formed Stainless Steel Tubular Sections
| SAGE Publications | 2008
Web Crippling of Cold-Formed Stainless Steel Tubular Sections
| Online Contents | 2008
Cold-Formed Stainless Steel Sections Subjected to Web Crippling
| British Library Online Contents | 2006