Debonding failure has been reported as the dominant failure mode for FRP strengthening in flexure. This paper explores a novel debonding monitoring method for FRP strengthened structures by means of OTDR-based fiber optic technology. Interface slip as a key factor in debonding failures will be measured through sensing optic fibers. FRP pulling tests were conducted to verify the proposed monitoring method. It is found that the proposed method is feasible in slip measurement with high sensitivity, and would be cost effective because of the low price of sensors used, which shows its potential for large-scale applications in civil infrastructures, especially for bridges.
Monitoring of FRP-Repair Debonding Using OTDR Techniques
11th Biennial ASCE Aerospace Division International Conference on Engineering, Science, Construction, and Operations in Challenging Environments ; 2008 ; Long Beach, California, United States
Earth & Space 2008 ; 1-9
2008-09-04
Conference paper
Electronic Resource
English
FRP Bridge Deck Debonding Monitoring Method Using OTDR Technique
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