title: Monitoring the corrosion process of reinforced concrete using BOTDA and FBG sensors.
abstract: Expansion and cracking induced by the corrosion of reinforcement concrete is the major factor in the failure of concrete durability. Therefore, monitoring of concrete cracking is critical for evaluating the safety of concrete structures. In this paper, we introduce a novel monitoring method combining Brillouin optical time domain analysis (BOTDA) and fiber Bragg grating (FBG), based on mechanical principles of concrete expansion cracking. BOTDA monitors concrete expansion and crack width, while FBG identifies the time and position of cracking. A water-pressure loading simulation test was carried out to determine the relationship between fiber strain, concrete expansion and crack width. An electrical accelerated corrosion test was also conducted to evaluate the ability of this novel sensor to monitor concrete cracking under practical conditions.
authors.affiliation: Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China. jhmao@nit.zju.edu.cn.
authors.forename: Jianghong
authors.initials: J
authors.lastname: Mao
authors.affiliation: Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China. chanjiayun@gmail.com.
authors.forename: Jiayun
authors.initials: J
authors.lastname: Chen
authors.affiliation: Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China. lcui@zju.edu.cn.
authors.forename: Lei
authors.initials: L
authors.lastname: Cui
authors.affiliation: Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China. jinwl@zju.edu.cn.|Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China. jinwl@zju.edu.cn.
authors.forename: Weiliang
authors.initials: W
authors.lastname: Jin
authors.affiliation: Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China. zju_xuchen@zju.edu.cn.
authors.forename: Chen
authors.initials: C
authors.lastname: Xu
authors.affiliation: Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China. yong.he1979@gmail.com.
authors.forename: Yong
authors.initials: Y
authors.lastname: He