Investigation of cold-formed steel top-hat sections under bending

Asraf Uzzaman, A.M. Wrzesien, Robert Hamilton, JBP Lim, David Nash

Research output: Contribution to conferencePaper

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Abstract

In recent years, with the introduction of higher strength grades, cold-formed steel sections have become increasingly more slender. As a result, top-hat purlin sections have become an alternative to conventional zed purlins, particularly when smaller purlin spans (around 4 m) are required. Such top-hat sections are torsionally stiffer than zed purlins, and have greater resistance against lateral-torsional buckling. Furthermore, they do not require anti-sag rods. However, when determining their strength, they are susceptible to buckling. In this paper, a combination of full-scale laboratory tests and finite element analyses are used to investigate the bending strength of such top-hat sections. Both upward and downward loading conditions are considered. In this paper, twenty-seven full-scale experimental tests on top-hat sections are described. The moment capacities obtained experimentally are compared against those predicted by the Eurocodes and non-linear elasto-plastic finite element analyses.
Original languageEnglish
PagesArticle CC.15
Number of pages18
Publication statusPublished - 3 Sep 2013
Event14th International Conference on Civil, Structural and Environmental Engineering Computing, ICC2013 - Cagliari, Sardinia, Italy
Duration: 3 Sep 20136 Sep 2013

Conference

Conference14th International Conference on Civil, Structural and Environmental Engineering Computing, ICC2013
CountryItaly
CityCagliari, Sardinia
Period3/09/136/09/13

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Steel
Buckling
Bending strength
Plastics

Keywords

  • cold-formed steel
  • purlins
  • top-hat sections
  • Eurocode 3
  • finite element analysis

Cite this

Uzzaman, A., Wrzesien, A. M., Hamilton, R., Lim, JBP., & Nash, D. (2013). Investigation of cold-formed steel top-hat sections under bending. Article CC.15. Paper presented at 14th International Conference on Civil, Structural and Environmental Engineering Computing, ICC2013, Cagliari, Sardinia, Italy.
Uzzaman, Asraf ; Wrzesien, A.M. ; Hamilton, Robert ; Lim, JBP ; Nash, David. / Investigation of cold-formed steel top-hat sections under bending. Paper presented at 14th International Conference on Civil, Structural and Environmental Engineering Computing, ICC2013, Cagliari, Sardinia, Italy.18 p.
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Uzzaman, A, Wrzesien, AM, Hamilton, R, Lim, JBP & Nash, D 2013, 'Investigation of cold-formed steel top-hat sections under bending', Paper presented at 14th International Conference on Civil, Structural and Environmental Engineering Computing, ICC2013, Cagliari, Sardinia, Italy, 3/09/13 - 6/09/13 pp. Article CC.15.

Investigation of cold-formed steel top-hat sections under bending. / Uzzaman, Asraf; Wrzesien, A.M.; Hamilton, Robert; Lim, JBP; Nash, David.

2013. Article CC.15 Paper presented at 14th International Conference on Civil, Structural and Environmental Engineering Computing, ICC2013, Cagliari, Sardinia, Italy.

Research output: Contribution to conferencePaper

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AU - Uzzaman, Asraf

AU - Wrzesien, A.M.

AU - Hamilton, Robert

AU - Lim, JBP

AU - Nash, David

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AB - In recent years, with the introduction of higher strength grades, cold-formed steel sections have become increasingly more slender. As a result, top-hat purlin sections have become an alternative to conventional zed purlins, particularly when smaller purlin spans (around 4 m) are required. Such top-hat sections are torsionally stiffer than zed purlins, and have greater resistance against lateral-torsional buckling. Furthermore, they do not require anti-sag rods. However, when determining their strength, they are susceptible to buckling. In this paper, a combination of full-scale laboratory tests and finite element analyses are used to investigate the bending strength of such top-hat sections. Both upward and downward loading conditions are considered. In this paper, twenty-seven full-scale experimental tests on top-hat sections are described. The moment capacities obtained experimentally are compared against those predicted by the Eurocodes and non-linear elasto-plastic finite element analyses.

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KW - purlins

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Uzzaman A, Wrzesien AM, Hamilton R, Lim JBP, Nash D. Investigation of cold-formed steel top-hat sections under bending. 2013. Paper presented at 14th International Conference on Civil, Structural and Environmental Engineering Computing, ICC2013, Cagliari, Sardinia, Italy.