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CFRP strengthened openings in two-way concrete slabs: an experimental and numerical study
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Construction Engineering.ORCID iD: 0000-0001-7799-5809
Technical University of Denmark.
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2007 (English)In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 21, no 4, p. 810-826Article in journal (Refereed) Published
Abstract [en]

Rehabilitation and strengthening of concrete structures with externally bonded fibre reinforced polymers (FRPs) has been a viable technique for at least a decade. An interesting and useful application is strengthening of slabs or walls where openings are introduced. In these situations, FRP sheets are very suitable; not only because of their strength, but also due to that they are easy to apply in comparison to traditional steel girders or other lintel systems. Even though many benefits have been shown by strengthening openings with FRPs not much research have been presented in the literature. In this paper, laboratory tests on 11 slabs with openings, loaded with a distributed load are presented together with analytical and numerical evaluations. Six slabs with openings have been strengthened with carbon fibre reinforced polymers (CFRPs) sheets. These slabs are compared with traditionally steel reinforced slabs, both with (four slabs) and without openings (one slab). The slabs are quadratic with a side length of 2.6 m and a thickness of 100 mm. Two different sizes of openings are used, 0.85 × 0.85 m and 1.2 × 1.2 m. The results from the tests show that slabs with openings can be strengthened with externally bonded CFRP sheets. The performance is even better than for traditionally steel reinforced slabs. The numerical and analytical evaluations show good agreement with the experimental results.

Place, publisher, year, edition, pages
2007. Vol. 21, no 4, p. 810-826
National Category
Infrastructure Engineering Construction Management
Research subject
Structural Engineering; Construction Engineering and Management
Identifiers
URN: urn:nbn:se:ltu:diva-9815DOI: 10.1016/j.conbuildmat.2006.06.009ISI: 000244502000012Scopus ID: 2-s2.0-33845354214Local ID: 88022d20-b05e-11db-840a-000ea68e967bOAI: oai:DiVA.org:ltu-9815DiVA, id: diva2:982753
Note
Validerad; 2007; 20061212 (ysko)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Enochsson, OlaLundqvist, JoakimTäljsten, BjörnOlofsson, Thomas

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