[1] Maheshwari M, Tjin S C, Asundi A. Combined fiber Bragg grating and fiber optic polarimetric sensors on a single fiber for structural health monitoring of two-dimensional structures[J]. Structural Health Monitoring, 15, 599-609(2016).

[2] Glisic B. Concise historic overview of strain sensors used in the monitoring of civil structures: the first one hundred years[J]. Sensors, 22, 2397(2022).

[3] Liu H W[M]. Mechanics of materials(2011).

[4] Li Y, Wang H P, Cai W B et al. Stability monitoring of surrounding rock mass on a forked tunnel using both strain gauges and FBG sensors[J]. Measurement, 153, 107449(2020).

[5] Biondi Vaccariello A M, Abedin S, Wu R et al. Distributed strain sensing textile using a rosette pattern fiber sensor[J]. Proceedings of SPIE, 12487, 124871F(2023).

[6] Suhaimi N S, Ahmad M I M, Nuawi M Z et al. Structural condition assessment based strain-stress behaviour for railway welded rail joint using rosette fibre Bragg grating optical sensor[J]. Results in Engineering, 19, 101300(2023).

[7] Biazi-Neto V, Marques C A F, Frizera-Neto A et al. FBG-embedded robotic manipulator tool for structural integrity monitoring from critical strain-stress pair estimation[J]. IEEE Sensors Journal, 22, 5695-5702(2022).

[8] Ramos C A, de Oliveira R, Marques A T et al. Design and experimental evaluation of a composite strain rosette using fiber Bragg grating[J]. Microwave and Optical Technology Letters, 53, 1853-1857(2011).

[9] Shen W, Yan R J, Xu L et al. Application study on FBG sensor applied to hull structural health monitoring[J]. Optik, 126, 1499-1504(2015).

[10] Chen D M, Dai X N, Tang Z B. Development of metallized three-directional fibre Bragg grating strain sensor[J]. Journal of Physics: Conference Series, 1654, 012092(2020).

[11] Wang H K, Xu D C, Lin L et al. Design and performance study on three-way strain gauge based on fiber grating[J]. Piezoelectrics & Acoustooptics, 43, 761-765(2021).

[12] Li H, Wang M, Wu B Y et al. Fabrication of chirped and tilted fiber Bragg gratings with femtosecond laser[J]. Acta Optica Sinica, 43, 0536001(2023).

[13] Tian K, Chen G X, Song Q Y et al. Time- and wavelength-division multiplex distributed sensing interrogation system based on distributed feedback laser array and ultraweak fiber Bragg grating[J]. Optical Engineering, 56, 117104(2017).

[14] Li C L, Tang J G, Cheng C et al. Simultaneously distributed temperature and dynamic strain sensing based on a hybrid ultra-weak fiber grating array[J]. Optics Express, 28, 34309-34319(2020).

[15] Han H M, Shi B, Zhang C C et al. Application of ultra-weak FBG technology in real-time monitoring of landslide shear displacement[J]. Acta Geotechnica, 18, 2585-2601(2023).

[16] Tong G Q, Liu D M, Huang J L et al. Research on dual-core ribbon flexible inclinometric fiber optic cable based on ultra-weak fiber grating[J]. Laser & Optoelectronics Progress, 61, 1906006(2024).

[17] Luo Z H, Ding S, Lin Z K et al. Ultra-weak fiber grating strain field monitoring method for bored piles[J]. Laser Journal, 44, 207-211(2023).

[18] Zheng X, Shi B, Sun M Y et al. Evaluating the effect of post-grouting on long bored pile based on ultra-weak fiber Bragg grating array[J]. Measurement, 214, 112743(2023).

[19] Yang M H, Bai W, Guo H Y et al. Huge capacity fiber-optic sensing network based on ultra-weak draw tower gratings[J]. Photonic Sensors, 6, 26-41(2016).

[20] Luo Z H, Lu B, Xiang H et al. A modular demodulation system of ultra-weak fiber Bragg grating[J]. Journal of Natural Science of Heilongjiang University, 39, 741-749(2022).

[21] Liu X M, Ren Y L, Zhou F et al. Research progress of FBG sensing signal demodulation technology for high-speed dynamic measurement[J]. Chinese Journal of Lasers, 50, 1000001(2023).

[22] Luo Z H, Lin Z K, Ding S et al. Axial strain monitoring method of cast-in-place piles based on ultra-weak fiber Bragg grating[J]. Measurement Science and Technology, 34, 035204(2023).

[23] Zhong Z C, Zhao B, Lin J et al. Three dimensional in-situ stress sensor based on optical fiber sensing technology[J]. Optics and Precision Engineering, 26, 325-335(2018).