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Resistance of cold-formed high strength steel circular and polygonal sections: Part 2: Numerical investigations
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
Delft University of Technology.ORCID iD: 0000-0003-4791-2341
University of Coimbra, ISISE, Department of Civil Engineering, University of Coimbra.
Virginia Polytechnic Institute and State University, Universidade de Coimbra , ISISE, Department of Civil Engineering, University of Coimbra.
Number of Authors: 42016 (English)In: Journal of constructional steel research, ISSN 0143-974X, E-ISSN 1873-5983, Vol. 125, p. 227-238Article in journal (Refereed) Published
Abstract [en]

This paper is the second part of the study on the cold-formed high strength steel circular and polygonal sections intended to be used in tubular wind towers. Results from 32 numerical finite element analysis (FEA) models were compared with and calibrated against results of the tests on 32 corresponding specimens. The FEA results agreed well with the experimental results in terms of resistances and load-displacement curves. Further investigations on the numerical models were performed. Yield stress used in the FEA significantly affected the resistances of the numerical models. Using 0.2% proof stress leaded to higher resistance than the experimental results. Corners significantly influenced buckling behaviour in the polygonal section models. Analyses of an oval opening in the tubular specimens showed that peak stresses around the opening were considerably higher in the polygonal section models than in the circular section models. Finally, investigation of sensitivity to geometrical imperfections indicated that failure modes of numerical models with geometrical imperfections according to EC3 significantly differed from those of tested specimens and numerical models with geometrical imperfections obtained from the 3D scans.

Place, publisher, year, edition, pages
2016. Vol. 125, p. 227-238
National Category
Building Technologies
Research subject
Steel Structures
Identifiers
URN: urn:nbn:se:ltu:diva-7640DOI: 10.1016/j.jcsr.2016.06.014ISI: 000381834200017Scopus ID: 2-s2.0-84976871845Local ID: 60a8f640-4371-4b15-a819-88e3073103a4OAI: oai:DiVA.org:ltu-7640DiVA, id: diva2:980530
Note

Validerad; 2016; Nivå 2; 20160705 (andbra)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved
In thesis
1. Resistance of cold-formed high strength steel sections: Effect of cold-formed angle
Open this publication in new window or tab >>Resistance of cold-formed high strength steel sections: Effect of cold-formed angle
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå University of Technology, 2017
Series
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544
National Category
Civil Engineering
Research subject
Steel Structures
Identifiers
urn:nbn:se:ltu:diva-64936 (URN)978-91-7583-931-8 (ISBN)978-91-7583-932-5 (ISBN)
Public defence
2017-10-06, F1031, Luleå University of Technology, 10:00 (English)
Supervisors
Available from: 2017-08-11 Created: 2017-08-02 Last updated: 2017-11-24Bibliographically approved

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Tran, Anh TuanVeljkovic, Milan

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