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Statistical Analysis of Flexural-Buckling-Resistance Models for High-Strength Steel Columns
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-1818-0914
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.
Associate Director, Steel Construction Institute, Silwood Park, Ascot, UK.
2020 (English)In: Journal of Structural Engineering, ISSN 0733-9445, E-ISSN 1943-541X, Vol. 146, no 2Article in journal (Refereed) Published
Abstract [en]

Flexural buckling is one of the main problems steel structures are faced with in ensuring an economic design. In Europe, the buckling resistance is calculated using an imperfection factor based on the section type, fabrication method, and steel grade. The current European design standards contain guidelines for the imperfection factor for sections made of steels with yield strength up to and including 700 MPa. However, the current design codes are based mainly on tests performed on steels with yield strength below 460 MPa. Therefore, the applicability of the methodology was reassessed. This paper reviewed the background documentation of the European flexural-buckling design methodology and discussed the current design practice described in the American National Standard. A total of 72 flexural-buckling experiments performed on cold-formed, hot-finished, and welded sections made of steel with yield strength in the range 690–960 MPa were collected and analyzed. Four models for estimating the resistance of high-strength steel struts subjected to pure compression were statistically evaluated based on the collected data. Finally, a recommendation for the estimation of flexural-buckling resistance of high-strength steel members is presented.

Place, publisher, year, edition, pages
American Society of Civil Engineers (ASCE), 2020. Vol. 146, no 2
National Category
Other Civil Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-77188DOI: 10.1061/(ASCE)ST.1943-541X.0002529OAI: oai:DiVA.org:ltu-77188DiVA, id: diva2:1379154
Note

Validerad;2020;Nivå 2;2019-12-16 (johcin)

Available from: 2019-12-16 Created: 2019-12-16 Last updated: 2019-12-16Bibliographically approved

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Sabau, GabrielLagerqvist, Ove

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