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Shear behavior of stainless steel girders with corrugated webs
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
RISE Research Institutes of Sweden, Materials and Production, Applied Mechanics.ORCID iD: 0000-0002-3481-1368
2023 (English)In: Journal of constructional steel research, ISSN 0143-974X, E-ISSN 1873-5983, Vol. 210, article id 108086Article in journal (Refereed) Published
Abstract [en]

In this paper, the shear strength of corrugated web girders made of EN 1.4162/LDX 2101 stainless steel is investigated. Four full-scale trapezoidal corrugated web girders were tested under shear. Before conducting the tests, DIC was used to measure the real geometric imperfections in the web panels. Complementary finite element analysis studies were conducted to assess the sensitivity of the shear strength to initial imperfections. The experimental results indicated that all the tested girders with a local slenderness ratio of λ = 0.7 attained the shear yield strength, which was then followed by strain hardening in the material at a level that was 8–18% higher than the yield strength. This implies that the Eurocode's limit of λ = 0.25 to attain the plastic shear strength in corrugated webs can be quite conservative for stainless steel. According to the findings of the imperfection sensitivity studies, an initial geometric imperfection based on the first eigen buckling mode and with a maximum amplitude of amax/200, where amax is the maximum corrugation fold length, yielded ultimate strength within 3% of the test results. When the amplitude was increased to hw/200, where hw is the web height, the ultimate strength was estimated to be 25% lower on average than in the experiments. In three of the studied girders, initial imperfections with other forms than the first buckling mode were found to be more critical. Further, it was found that regardless of mode number, mode shapes that are more extended over the web panel result in a higher degradation of the ultimate shear strength. © 2023 The Authors

Place, publisher, year, edition, pages
Elsevier Ltd , 2023. Vol. 210, article id 108086
Keywords [en]
Corrugated web girders, Imperfection sensitivity, Shear strength, Stainless steel, Beams and girders, Buckling, Yield stress, Buckling mode, Corrugated web, Initial imperfection, Shear behaviour, Shears strength, Steel girder, Ultimate strength, Web panels, Strain hardening
National Category
Building Technologies
Identifiers
URN: urn:nbn:se:ri:diva-65673DOI: 10.1016/j.jcsr.2023.108086Scopus ID: 2-s2.0-85163343852OAI: oai:DiVA.org:ri-65673DiVA, id: diva2:1786923
Note

Correspondence Address: M. Amani; Department of Architecture and Civil Engineering, Chalmers University of Technology, Gothenburg, SE-412 96, Sweden;  

The research work reported in this paper was conducted within the research project “Sunlight,” which was funded by the Swedish Innovation Agency , VINNOVA , and LIGHTer during the period 2019–2022. The Swedish Transport Administration (Trafikverket), the Swedish Institute of Steel Construction (SBI), SWERIM, COWI, WSP, ESAB, Stål och Rörmontage, and Outokumpu all made valuable contributions to the project. 

Available from: 2023-08-10 Created: 2023-08-10 Last updated: 2023-08-10Bibliographically approved

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Flansbjer, Mathias

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