JIN Wei-liang, MAO Jiang-hong, HE Yong. Experimental Analysis on Real-time Distributed Strain Measurement in Concrete[J]. Journal of Civil and Environmental Engineering, 2011, 33(1): 1-6.
JIN Wei-liang, MAO Jiang-hong, HE Yong. Experimental Analysis on Real-time Distributed Strain Measurement in Concrete[J]. Journal of Civil and Environmental Engineering, 2011, 33(1): 1-6. DOI: 10.11835/j.issn.1674-4764.2011.01.002.
The Brilliouin optical time domain analysis (BOTDA) is a newly developed technique adopted to measure and monitor the strain and temperature generated along optical fibers. The BOTDA has the characteristics of distributed measurement
long distance
high precision and durability
so it is suitable to structural health monitoring. Then a new optical fiber sensor embedded method based on air-blowing and vacuum grouting is introduced. It can lay the long distance distributed optical fiber into the concrete easily in short time. An experiment has been set up to study the validity of the new method
which shows that the embedded optical fiber can measure the concrete strain accurately
and it can realize the comprehensive
long-term
stable and real-time health monitoring to the civil structure.