Review of near-surface mounted FRP plates in the strengthening of continuous flexural members and bond behaviour

Gravina, R, Aydin, H and Visintin, P 2018, 'Review of near-surface mounted FRP plates in the strengthening of continuous flexural members and bond behaviour', Australian Journal of Civil Engineering, vol. 16, no. 2, pp. 158-165.


Document type: Journal Article
Collection: Journal Articles

Title Review of near-surface mounted FRP plates in the strengthening of continuous flexural members and bond behaviour
Author(s) Gravina, R
Aydin, H
Visintin, P
Year 2018
Journal name Australian Journal of Civil Engineering
Volume number 16
Issue number 2
Start page 158
End page 165
Total pages 8
Publisher Taylor & Francis Australasia
Abstract Bonding carbon fibre-reinforced polymers (FRP) to reinforced concrete (RC) flexural members has become a popular means to enhance load carrying capacity and prolong service life. Considering the type of FRP strengthening system, the near-surface mounting (NSM) technique of embedding FRP strips in saw-cut grooves within the concrete cover of RC members to flexurally strengthen beams and slabs is known to have desirable bond behaviour benefits over external bonded FRP plates. Further the NSM technique has attracted growing attention in strengthening of statically indeterminate RC members. However, little is known about the durability of the critical bond between the embedded FRP and the concrete when installed using this technique. In this paper, experimental results of continuous flexural members strengthened with NSM FRP is collated and reviewed to investigate failure modes, ductility and moment redistribution capability. Ductility and moment redistribution characteristics of strengthened RC members relies on the bond performance of reinforcement to concrete and hence this paper also reviews durability testing of NSM joints. Regression analysis shows that concrete compressive strength and steel reinforcement ratios are paramount to maintaining ductility under all strengthening schemes.
Subject Structural Engineering
Keyword(s) bond
continuous
ductility
fibre-reinforced polymer
Flexure
near-surface mounted
reinforced concrete
DOI - identifier 10.1080/14488353.2018.1537594
Copyright notice © 2018 Engineers Australia.
ISSN 1448-8353
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