Experimental investigation of RC beams using BOTDA(R)-FRP-OF

Zhi Zhou; Jianping He; Ying Huang; Jinping Ou

doi:10.1117/12.787120

16 May 2008 Experimental investigation of RC beams using BOTDA(R)-FRP-OF

Zhi Zhou, Jianping He, Ying Huang, Jinping Ou

Proceedings Volume 7004, 19th International Conference on Optical Fibre Sensors; 700464 (2008) https://doi.org/10.1117/12.787120
Event: 19th International Conference on Optical Fibre Sensors, 2008, Perth, WA, Australia

Abstract

Brillouin based fiber optic sensing turns to be a promising technology for Structural Health Monitoring (SHM). However, the bare optical fiber is too fragile to act as a practical sensor, so high durability and large range (large strain) Brillouin distributed sensors are in great needs in field applications. For this reason, high durable and large range optical fiber Brillouin Optical Time Domain Analysis (Reflectometer) sensors packaged by Fiber Reinforcement Polymer (FRP), named BOTDA(R)-FRP-OF, have been studied and developed. Besides, in order to study the large strain, crack and slip between the rebar and concrete in reinforced concrete (RC) beams using BOTDR(A) technique, five RC Beams installed with BOTDA(R)-FRP-OF sensors have been set up. And the damage characteristics of the RC beams were investigated by comparing the strain measured by the BOTDA(R)-FRP-OF sensors and the strain from traditional electric strain gauges and Fiber Bragg Grating (FBG) sensors, respectively. The test results show that the BOTDA(R)-FRP-OF sensor can effectively detect the damage (including crack and slip) characteristic of RC beam, and it is suitable for the long-term structural health monitoring on concrete structures such as bridge, big dam and so on.

Citation Download Citation

Zhi Zhou, Jianping He, Ying Huang, and Jinping Ou "Experimental investigation of RC beams using BOTDA(R)-FRP-OF", Proc. SPIE 7004, 19th International Conference on Optical Fibre Sensors, 700464 (16 May 2008); https://doi.org/10.1117/12.787120

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