[1] KAKLAUSKAS G, SOKOLOV A, RAMANAUSKAS R, et al. Reinforcement strains in reinforced concrete tensile members recorded by strain gauges and FBG sensors:experimental and numerical analysis[J]. Sensors (Basel), 2019, 19(1):200.
[2] LIU Y G, YANG D Q, WANG Y X, et al. Fabrication of dual-parameter fiber-optic sensor by cascading FBG with FPI for simultaneous measurement of temperature and gas pressure[J]. Optics communications, 2019, 443:166-171.
[3] DATTA A, BABU A M, SAHA A. Enhanced sensitivity of fiber optic evanescent wave absorption-based concentration sensor by shining a Bessel-Gauss beam and effect of fiber bending on the sensor response:a theoretical analysis[J]. Optical engineering, 2019, 58(5):1-12.
[4] OKABE Y, YASHIRO S, KOSAKA T, et al. Detection of transverse cracks in CFRP composites using embedded fiber Bragg grating sensors[J]. Smart material structure, 2000, 9(6):832-838.
[5] OKABE Y, TSUJI R, TAKEDA N. Application of chirped fiber Bragg grating sensors for identification of crack locations in composites[J]. Composites part A-applied science and manufacturing, 2004, 35(1): 59-65.
[6] TAKEDA S, OKABE Y, TAKEDA N. Delamination detection in CFRP laminates with embedded small-diameter fiber Bragg grating sensors[J]. Composites part A-applied science and manufacturing, 2002, 33(7):971-980.
[7] KESAVAN K, RAVISANKAR K, PARIVALLAL S, et al. Experimental studies on fiber optic sensors embedded in concrete[J]. Measurement, 2010, 43(2):157-163.
[8] RODRIGUES C, FéLIX C, LAGE A, et al. Development of a long-term monitoring system based on FBG sensors applied to concrete bridges[J]. Engineering structure, 2010, 32(8):1993-2002.
[9] SU H Z, LI X, FANG B, et al. Crack detection in hydraulic concrete structures using bending loss data of optical fiber[J]. Journal of intelligent material systems and structures, 2017, 28(13):1719-1733.
[10] DAWOOD N, MARZOUK H. Crack spacing and width of thick high strength reinforced concrete panels[J]. Advances in structural engineering, 2013, 16(2): 273-285.
[11] SOLTANI A, HARRIES K A, SHAHROOZ B M. Crack opening behavior of concrete reinforced with high strength reinforcing steel[J]. International journal of concrete structures and materials, 2013, 7(4):253.
[12] WANG L L, HAO J G, SAI Y Z. Crack opening estimate of reinforced concrete using optical fiber sensor[C]//2020 IEEE 5th Optoelectronics Global Conference, September 7-11, 2020, Shenzhen, China. New York:IEEE, 2020:137-139.
[13] GAFSI R, EL-SHERIF M A. Analysis of induced birefringence effects on fiber Bragg gratings[J]. Optical fiber technology, 2000, 6(3):299-323.
[14] WANG L L, XIN X J, SONG J, et al. Finite element analysis-based study of fiber Bragg grating sensor for cracks detection in reinforced concrete[J]. Optical engineering, 2018, 57(2):1-6.
[15] ERDOGAN T. Fiber grating spectra[J]. Journal of lightwave technology, 1997, 15(8):1277-1294.
[16] WANG L L, SONG J, SAI Y Z, et al. Crack width analysis of reinforced concrete using FBG sensor[J]. IEEE photonics journal, 2019, 11(1):1-8.