An Optical Fiber Sensor Method for Simultaneously Monitoring Corrosion and Structural Strain Induced by Loading

作者：Mao, Jianghong; Xu, Fangyuan^*; Jin, Weiliang; Gao, Qian; Xu, Yidong; Xu, Chen

来源：Journal of Testing and Evaluation, 2018, 46(4): 1443-1451.

DOI：10.1520/JTE20160466

• concrete durability
• corrosion
• cracking
• optical fiber
• BOTDA

Monitoring the entire process of concrete corrosion is critical for assessing the remaining life of the structure and determining if maintenance is needed. In this study, the long-distance embedded optical fiber sensor (LEOFS) and the embedded corrosion optical fiber sensor (ECOFS) were both embedded to form a smart reinforced concrete beam that could simultaneously sense loading and corrosion. The structural strain induced by loading was recorded by the LEOFS; meanwhile, the structural strain induced by corrosion was monitored by the ECOFS. The experimental result shows that the aluminum-plastic tube makes the LEOFS effective for long-term monitoring in the corrosive environment. The result also indicates that selecting an appropriate location for the ECOFS leads to high accuracy measurement of strain induced by corrosion. The data of the ECOFS are meaningful for judging the corrosion cracking moment and for estimating the corrosion crack width for the entire corrosion process.

• 出版日期2018-7
• 单位浙江大学宁波理工学院; 浙江大学; 重庆交通大学