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Proceedings Paper

Local health monitoring of Sifangtai Bridge using fiber Bragg grating sensors
Author(s): Xuefeng Zhao; Jinping Ou
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Paper Abstract

In this paper, one large Fiber Bragg Grating (FBG) sensor sensing network for bridge local health monitoring was studied, designed and implemented to Harbin Sifangtai Bridge, China. According to the hot point principle and finite element analysis results, FBG sensors installation scheme was made to monitor the local strain of key elements, respectively. 60 FBG sensors had been installed in monitoring points along the height of I-shape girders distributed in three main monitoring sections along the bridge. Monitoring results in load testing period was obtained, the static and dynamic results show that FBG sensors can monitoring the local strain precisely, and the local strain response is in the safe range under test vehicle load. Monitoring results in service period was obtained, 9 months after load test. Results show that maximum local strain responses in three main monitoring sections are in the safe range, under the dynamic vehicle load. Comparison of the monitoring results from FBG sensor sensing network are used to unveil the local health condition of Sifangtai Bridge reflected by local strain response.

Paper Details

Date Published: 10 April 2008
PDF: 12 pages
Proc. SPIE 6935, Health Monitoring of Structural and Biological Systems 2008, 69351M (10 April 2008); doi: 10.1117/12.778672
Show Author Affiliations
Xuefeng Zhao, Dalian Univ. of Technology (China)
Jinping Ou, Dalian Univ. of Technology (China)
Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 6935:
Health Monitoring of Structural and Biological Systems 2008
Tribikram Kundu, Editor(s)

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