Strain monitoring of RC members strengthened with smart NSM FRP bars
Article
Article Title | Strain monitoring of RC members strengthened with smart NSM FRP bars |
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ERA Journal ID | 3470 |
Article Category | Article |
Authors | Wang, Bo (Author), Teng, J. G. (Author), De Lorenzis, Laura (Author), Zhou, Li-Min (Author), Ou, Jinping (Author), Jin, Wei (Author) and Lau, K. T. (Author) |
Journal Title | Construction and Building Materials |
Journal Citation | 23 (4), pp. 1698-1711 |
Number of Pages | 13 |
Year | 2009 |
Publisher | Elsevier |
Place of Publication | Amsterdam, Netherlands |
ISSN | 0950-0618 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.conbuildmat.2008.07.027 |
Abstract | Fiber-reinforced polymer (FRP) bars can be used as internal reinforcement for new reinforced concrete (RC) structures and as near-surface mounted (NSM) reinforcement for the strengthening of RC structures. The NSM method is an emerging strengthening technique for RC structures, where FRP bars are embedded into grooves cut in the cover of RC members. In both cases, strain monitoring of the FRP bars is desirable either for the investigation of the structural behavior or for the long-term health monitoring of the structure. This paper presents a study in which fiber-optic sensors were embedded into glass FRP (GFRP) bars to produce smart GFRP bars for NSM applications. The manufacturing process of the smart FRP bars is illustrated and their performance in tensile, bond and beam flexural tests is examined to assess the effectiveness of these smart FRP bars for achieving the dual purpose of structural strengthening and strain monitoring. On the basis of the test results, the advantages and limitations of fiber-optic sensors compared to electrical strain gages in the strain monitoring of NSM FRP bars are discussed. The bond and beam test results also confirm the effectiveness of the NSM method for the strengthening of RC structures. |
Keywords | fiber-optic sensors; fiber-reinforced polymer (FRP); beam tests; flexural strengthening; near-surface mounted reinforcement; pull-out tests; structural health monitoring; tensile tests; beams and girders; building materials; concrete reinforcements; fibre optic sensors; fibre reinforced plastics; polymeric glass; polymers; reinforced concrete; reinforced plastics; strengthening (metal); thickness measurement |
ANZSRC Field of Research 2020 | 400505. Construction materials |
400510. Structural engineering | |
401609. Polymers and plastics | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Hong Kong Polytechnic University, China |
Jilin Institute of Architecture and Civil Engineering, China | |
University of Salento, Italy | |
Harbin Institute of Technology, China | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q0q66/strain-monitoring-of-rc-members-strengthened-with-smart-nsm-frp-bars
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