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NSM CFRP Strengthening and Failure Loading of a Posttensioned Concrete Bridge
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0002-1398-6118
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0001-8889-4237
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0002-5154-7044
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0001-7799-5809
2016 (English)In: Journal of composites for construction, ISSN 1090-0268, E-ISSN 1943-5614, Vol. 20, no 3, article id 04015076.Article in journal (Refereed) Published
Abstract [en]

Two carbon-fiber-reinforced polymer (CFRP) systems developed as possible means to strengthen existing concrete structures have been applied to a bridge at Kiruna (Sweden). The bridge was no longer in service and was thus used in extensive tests to failure. It was a posttensioned five-span bridge consisting of three longitudinal main girders topped with a concrete slab. The program reported here consisted of a series of three tests of the girders in the second span: loading each girder up to 2.0 MN before strengthening, loading each girder up to 2.0 MN after strengthening, and loading to failure after strengthening. One of the girders was strengthened by installing three 10×10  mm 2 near-surface mounted (NSM) CFRP bars on the soffits, and another by installing three prestressed 1.4×80  mm 2 CFRP laminates. This paper focuses on the NSM-strengthened girder, which failed at a maximum load of 6.1 MN, with a corresponding midspan deflection of 159 mm. The failure was a combination of flexure and shear, and the strain in the NSM bars at the ULS was 1.2%.

Place, publisher, year, edition, pages
2016. Vol. 20, no 3, article id 04015076.
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-15356DOI: 10.1061/(ASCE)CC.1943-5614.0000635ISI: 000379984900013Scopus ID: 2-s2.0-84973375235Local ID: edb75972-a57d-4f17-9b8f-dbb9be05fb4eOAI: oai:DiVA.org:ltu-15356DiVA, id: diva2:988330
Note
Validerad; 2016; Nivå 2; 20151113 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Nilimaa, JonnyBagge, NiklasBlanksvärd, ThomasTäljsten, Björn

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