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Strengthening of RC beams using bottom and side NSM reinforcement
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0003-1329-555X
Northern Research Institute – NORUT.ORCID iD: 0000-0001-9423-7436
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-8682-876X
echnical University of Denmark, Department of Civil Engineering.
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2018 (English)In: Composites Part B: Engineering, ISSN 1359-8368, E-ISSN 1879-1069, Vol. 149, p. 82-91Article in journal (Refereed) Published
Abstract [en]

The allowable strain in fibre reinforced polymers reinforcement is limited by design codes to avoid debonding. The near-surface mounted (NSM) reinforcement technique has been proven to produce better anchorage behaviour compared to externally bonded reinforcement solutions. However, NSM solutions do not always eliminate debonding issues, with concrete cover detachment (CCD) typically occurring in RC beams strengthened for flexure. This experimental study investigated the efficiency of side mounted (S) compared to bottom mounted (B) NSM bars to prevent CCD. The experimental results were compared to models available in the literature that predict the observed failure modes and the crack spacing in the NSM anchorage zone. Compared to B-NSM, the S-NSM solution was successful in avoiding brittle CCD failure and showed increased rotational capacity and energy dissipation at failure. Existing CCD debonding models were found to be conservative.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 149, p. 82-91
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-68708DOI: 10.1016/j.compositesb.2018.05.011Scopus ID: 2-s2.0-85047119715OAI: oai:DiVA.org:ltu-68708DiVA, id: diva2:1205360
Note

Validerad;2018;Nivå 2;2018-06-01 (svasva)

Available from: 2018-05-14 Created: 2018-05-14 Last updated: 2018-06-01Bibliographically approved

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Sabau, CristianPopescu, CosminSas, GabrielBlanksvärd, ThomasTäljsten, Björn
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CiteExportLink to record
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Citation style
  • apa
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  • de-DE
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  • Other locale
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Output format
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