Strain monitoring of RC members strengthened with smart NSM FRP bars

Wang, Bo and Teng, J. G. and De Lorenzis, Laura and Zhou, Li-Min and Ou, Jinping and Jin, Wei and Lau, K. T. (2009) Strain monitoring of RC members strengthened with smart NSM FRP bars. Construction and Building Materials, 23 (4). pp. 1698-1711. ISSN 0950-0618


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.

Statistics for USQ ePrint 18927
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher's copyright policy.
Faculty/School / Institute/Centre: Current - USQ Other
Faculty/School / Institute/Centre: Current - USQ Other
Date Deposited: 05 Jul 2011 11:17
Last Modified: 17 Oct 2014 01:38
Uncontrolled 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
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
09 Engineering > 0905 Civil Engineering > 090506 Structural Engineering
09 Engineering > 0912 Materials Engineering > 091209 Polymers and Plastics
Socio-Economic Objectives (2008): B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials
Identification Number or DOI:

Actions (login required)

View Item Archive Repository Staff Only