Feasibility study on corrosion monitoring of a concrete column with central rebar using BOTDR
Yijie Sun,Bin Shi,Shen-en Chen,Honghu Zhu,Dan Zhang,Yi Lu
Abstract
Optical fiber Brillouin sensor in a coil winding setup is proposed in this paper to measure the expansion deformation of a concrete column with a central rebar subjected to accelerated corrosion. The optical sensor monitored the whole dynamic corrosion process from initial deformation to final cracking. Experimental results show that Brillouin Optical Time Domain Reflectometer (BOTDR) can accurately
measure the strain values and identify the crack locations of the simulated reinforced concrete (RC) column. A theoretical model is used to calculate the RC corrosion expansive pressure and crack length. The results
indicate that the measured strain and cracking history revealed the development of the steel bar corrosion
inside the simulated RC column.
Yijie Sun, Bin Shi, Honghu Zhu, Dan Zhang and Yi Lu:School of Earth Sciences and Engineering, Nanjing University, Nanjing, China
Shen-en Chen:Department of Civil and Environmental Engineering, University of North Carolina
Charlotte, NC 28223, USA
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