Distortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression

The use of cold-formed steel (CFS) channel sections with rectangular holes in the web is becoming gradually popular in building structures. However, such holes can result in sections becoming more susceptible to be distortional buckling and display lower load-carrying capacities. This paper presents...

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Autores principales:	Yanli Guo, Xingyou Yao
Formato:	article
Lenguaje:	EN
Publicado:	AIMS Press 2021
Materias:	cold-formed steel axially-compressed columns rectangular hole distortional buckling interaction buckling effective width method Biotechnology TP248.13-248.65 Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/496facc73adf496d9c85721ef9e69bba
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spelling	oai:doaj.org-article:496facc73adf496d9c85721ef9e69bba2021-11-11T01:16:25ZDistortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression10.3934/mbe.20213121551-0018https://doaj.org/article/496facc73adf496d9c85721ef9e69bba2021-07-01T00:00:00Zhttps://www.aimspress.com/article/doi/10.3934/mbe.2021312?viewType=HTMLhttps://doaj.org/toc/1551-0018The use of cold-formed steel (CFS) channel sections with rectangular holes in the web is becoming gradually popular in building structures. However, such holes can result in sections becoming more susceptible to be distortional buckling and display lower load-carrying capacities. This paper presents a total of 44 axially-compressed tests of CFS lipped channel columns with and without rectangular web holes including different hole sizes and cross-sections. The test results show that the specimens were controlled by distortional buckling or interaction of local buckling and distortional buckling. The load-carrying capacities of specimens with rectangular holes were lower than that of specimens without hole. The load-carrying capacities of specimens were gradually decreased with the increasing of dimensions of holes. Then a nonlinear elasto-plastic finite element model (FEM) was developed and the analysis results showed good agreement with the test results. The validated FE model was used to conduct a parametric study involving 16 FEM to investigate the effects of the section, the dimension of the hole, and the number of holes on the ultimate strength of such channels. Furthermore, the formulas to predict the distortional buckling coefficient were developed for the section with holes by using the verified FEM. Finally, the tests and parametric study results were compared against the distortional buckling design strengths calculated in accordance with the developed method. The comparison results show that the proposed design method closely predict the load carrying capacity of CFS channel sections with rectangular web holes.Yanli GuoXingyou YaoAIMS Pressarticlecold-formed steelaxially-compressed columnsrectangular holedistortional bucklinginteraction bucklingeffective width methodBiotechnologyTP248.13-248.65MathematicsQA1-939ENMathematical Biosciences and Engineering, Vol 18, Iss 5, Pp 6239-6261 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	cold-formed steel axially-compressed columns rectangular hole distortional buckling interaction buckling effective width method Biotechnology TP248.13-248.65 Mathematics QA1-939
spellingShingle	cold-formed steel axially-compressed columns rectangular hole distortional buckling interaction buckling effective width method Biotechnology TP248.13-248.65 Mathematics QA1-939 Yanli Guo Xingyou Yao Distortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression
description	The use of cold-formed steel (CFS) channel sections with rectangular holes in the web is becoming gradually popular in building structures. However, such holes can result in sections becoming more susceptible to be distortional buckling and display lower load-carrying capacities. This paper presents a total of 44 axially-compressed tests of CFS lipped channel columns with and without rectangular web holes including different hole sizes and cross-sections. The test results show that the specimens were controlled by distortional buckling or interaction of local buckling and distortional buckling. The load-carrying capacities of specimens with rectangular holes were lower than that of specimens without hole. The load-carrying capacities of specimens were gradually decreased with the increasing of dimensions of holes. Then a nonlinear elasto-plastic finite element model (FEM) was developed and the analysis results showed good agreement with the test results. The validated FE model was used to conduct a parametric study involving 16 FEM to investigate the effects of the section, the dimension of the hole, and the number of holes on the ultimate strength of such channels. Furthermore, the formulas to predict the distortional buckling coefficient were developed for the section with holes by using the verified FEM. Finally, the tests and parametric study results were compared against the distortional buckling design strengths calculated in accordance with the developed method. The comparison results show that the proposed design method closely predict the load carrying capacity of CFS channel sections with rectangular web holes.
format	article
author	Yanli Guo Xingyou Yao
author_facet	Yanli Guo Xingyou Yao
author_sort	Yanli Guo
title	Distortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression
title_short	Distortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression
title_full	Distortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression
title_fullStr	Distortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression
title_full_unstemmed	Distortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression
title_sort	distortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression
publisher	AIMS Press
publishDate	2021
url	https://doaj.org/article/496facc73adf496d9c85721ef9e69bba
work_keys_str_mv	AT yanliguo distortionalbucklingbehavioranddesignmethodofcoldformedsteellippedchannelwithrectangularholesunderaxialcompression AT xingyouyao distortionalbucklingbehavioranddesignmethodofcoldformedsteellippedchannelwithrectangularholesunderaxialcompression
_version_	1718439581062266880

Distortional buckling behavior and design method of cold-formed steel lipped channel with rectangular holes under axial compression

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