Feasibility study on corrosion monitoring of a concrete column with central rebar using BOTDR
Feasibility study on corrosion monitoring of a concrete column with central rebar using BOTDR
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DOI：
10.12989/sss.2014.13.1.041
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发表时间：
2014-01-01
影响因子：
3.5
通讯作者：
Lu, Yi
中科院分区：
文献类型：
--
作者：
Sun, Yijie;Shi, Bin;Lu, Yi
本文提出了一种光纤布里渊传感器的线圈缠绕装置，用于测量混凝土柱的膨胀变形的中心钢筋受到加速腐蚀。光学传感器监测了从初始变形到最终开裂的整个动态腐蚀过程。实验结果表明，布里渊光时域反射仪（BOTDR）可以准确测量模拟钢筋混凝土（RC）柱的应变值，并识别裂缝位置。采用理论模型计算了钢筋混凝土的腐蚀膨胀力和裂缝长度。结果表明，实测的应变和开裂历史揭示了钢筋锈蚀的发展模拟RC柱内。
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.