Application research on health monitoring of Sutong Bridge based on distributed optical fiber sensing

Yafei Feng; Huan Zheng; Hua Guan; Xiangyun Li; Hua Wei; Bin Hu; Haiyang Li

doi:10.1117/12.2537913

18 December 2019 Application research on health monitoring of Sutong Bridge based on distributed optical fiber sensing

Yafei Feng, Huan Zheng, Hua Guan, Xiangyun Li, Hua Wei, Bin Hu, Haiyang Li

Proceedings Volume 11340, AOPC 2019: Optical Fiber Sensors and Communication; 1134002 (2019) https://doi.org/10.1117/12.2537913
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China

Abstract

In this paper, combining with the tenth anniversary load test of Sutong Bridge, we proposed the Brillouin Optical Time Domain Analysis (BOTDA) to conduct health monitoring research on the bridge, and completed the following three aspects: Firstly as an auxiliary measure of strain monitoring, monitor the level of stress and strain along the longitudinal bridge to each position. Secondly through the parking of the vehicles at different positions on the bridge pavement, the influence lines on the overall structural stress of the bridge are obtained. Thirdly through the long-term strain monitoring of the bridge, the impact of the usual traffic load information on the bridge strain is obtained.The results show that the technology not only breaks through the monitoring bottleneck of traditional point sensors, but also realizes distributed measurement of strain on the transmission path; it can also be used for real-time monitoring, damage identification, crack location, settlement monitoring of traffic load information of bridges and other structures.. Compared with the traditional sensor test results, the effectiveness and frontier of the technology are proved, and the significance of the distributed fiber-optic sensor technology for the health monitoring of major structures such as bridges is fully explained.

Citation Download Citation

Yafei Feng, Huan Zheng, Hua Guan, Xiangyun Li, Hua Wei, Bin Hu, and Haiyang Li "Application research on health monitoring of Sutong Bridge based on distributed optical fiber sensing", Proc. SPIE 11340, AOPC 2019: Optical Fiber Sensors and Communication, 1134002 (18 December 2019); https://doi.org/10.1117/12.2537913

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