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Resistance of cold-formed high strength steel angles
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
Delft University of Technology, The Netherlands.
University of Coimbra, Portugal.
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2019 (English)In: Advanced steel construction, ISSN 1816-112X, Vol. 15, no 3, p. 242-251Article in journal (Refereed) Published
Abstract [en]

This paper describes a study of the behaviour of cold-formed high strength steel angles. Thirty-six specimens with different cold-formed angles (90°, 100°, 120°, 140°, 160°, and 170°) and different thicknesses (4 mm and 6 mm) were considered. The initial geometric imperfections of the specimens were determined using the 3D laser scanning method. The magnitudes of these geometric imperfections for torsional and torsional-flexural buckling and flexural buckling analyses were proposed. The commercial finite element analysis (FEA) programme ABAQUS with shell elements S4R was used for finite element analyses. Different material strengths in corner and flat parts along with different proof stresses (0.2%, 0.01%, and 0.006%) were considered in the numerical models. The experimental and FEA results showed good agreement. Influence of cold-formed angle on non-dimensional slenderness and reduction factor curves of the 4 mm thick columns with 90° and 120° cold-formed angles was analysed.

Place, publisher, year, edition, pages
The Hong Kong Institute of Steel Construction , 2019. Vol. 15, no 3, p. 242-251
Keywords [en]
High strength steel, Cold-formed angles, Geometrical imperfections, Proof stress, Experimental investigation, Finite element analysis
National Category
Civil Engineering Building Technologies Other Civil Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-63086DOI: 10.18057/IJASC.2019.15.3.4ISI: 000484782000004OAI: oai:DiVA.org:ltu-63086DiVA, id: diva2:1089437
Note

Validerad;2019;Nivå 2;2019-09-27 (johcin)

Available from: 2017-04-19 Created: 2017-04-19 Last updated: 2019-09-27Bibliographically 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
2019 (English)Doctoral thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Luleå University of Technology, 2019
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
2019-11-13, F1031, Luleå University of Technology, 10:00 (English)
Supervisors
Available from: 2017-08-11 Created: 2017-08-02 Last updated: 2019-10-22Bibliographically approved

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Tran, Anh TuanBernspång, Lars

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