Experimental Research on Reinforced Concrete Corrosion Monitoring based on Optical Fiber Sensor
Corrosion-induced cracking is a widely existed issue for coastal infrastructure which would lead to its advanced failure.The monitoring of corrosion-induced cracking is an important means to evaluate its influence to structure normal use and safe operation.However, traditional sensor such as strain gage is unsuitable to embed into concrete, and to record long-term strain of concrete caused by steel bar corrosion.The optical fiber sensor, Brillouin Optical Time Domain Analysis (BOTDA) can effectively avoid the undetected phenomenon existed in point-wise test method, and it owns the characteristic of automated monitoring.The optical fiber sensor is also electrical insulation and anti-electromagnetic interference, so it is suitable for detecting the corrosion-induced cracks.In this paper, experimental research on corrosion-induced cracking monitoring based on BOTDA is introduced.The distributed optical fiber embedded into concrete around the steel bar to record expansion force of concrete.An accelerated corrosion test is performed to investigate the relationship between tiny geometrical change of steel bar and concrete expansion force.Different rates of corrosion current are applied to the specimen.The accelerated corrosion test approved that the optical fiber sensor can effectively monitor the whole process of corrosion-induced cracking.
BOTDA concrete durability corrosion monitoring optical fiber
J.H.Mao Y.He F.LU
Ningbo Institute of Technology,Zhejiang University,Ningbo 315100,China Institute of Structural Engineering,Zhejiang University,Hangzhou,310058,China
国际会议
南京
英文
369-373
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）