Premium
Integrated distributed fiber optic sensing technology‐based structural monitoring of the pound lock
Author(s) -
Song ZhanPu,
Zhang Dan,
Shi Bin,
Chen ShenEn,
Shen MengFen
Publication year - 2017
Publication title -
structural control and health monitoring
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.587
H-Index - 62
eISSN - 1545-2263
pISSN - 1545-2255
DOI - 10.1002/stc.1954
Subject(s) - reflectometry , materials science , distributed acoustic sensing , optical fiber , fiber bragg grating , fiber optic sensor , time domain , structural health monitoring , structural engineering , composite material , engineering , fiber , computer science , telecommunications , computer vision
Summary In this paper, an integrated distributed fiber optic sensing technology, which includes Raman optical time‐domain reflectometry (ROTDR), Brillouin optical time‐domain analysis (BOTDA), and fiber Bragg grating (FBG) sensing technologies, is adopted to monitor the temperature and the stress/strain variations of a reinforced concrete pound lock structure during the construction process. The Raman optical time‐domain reflectometry was used to monitor the internal temperature variation throughout the concrete curing process when concrete hydration heat was released in the base plate of the lock head. The FBG temperature sensors were adopted to measure the surface temperature of the concrete, and the temperature data were used to compensate the results that are measured by BOTDA sensing technology to get the real concrete strain of the base plate. To better understand the stress/strain state of the base plate before and after filling water in the lock, the BOTDA sensing cable and FBG temperature sensors monitoring continued throughout the whole construction process. The observation provided a positive indication that the proposed integrated distributed fiber optic sensing technology may have great potential in performance monitoring of hydraulic structures.