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Proceedings Paper

Bridge external prestressing monitoring based on FBG
Author(s): Sheng Li; De-sheng Jiang
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Paper Abstract

Being an important bridge engineering structural strengthening manner, external prestressing method usually makes steel strand which is one of the most widely used member in external cable bear large strain in construction and operating stage. By means of directly testing structural strain to monitor the mechanical condition and prestressing loss of steel strand is a great challenge for civil engineers. In order to exert the advantages of FBG sensing technology, study FBGbased bridge external prestressing test method, achieve the FBG-based prestressing loss monitoring, in this paper, the difficulties that use FBG to test structural large strain were analyzed and a FBG-based monitoring strategy was elicited. In order to verify the proposed method, a real bridge strengthening engineering paradigm was given. The monitoring results showed that the proposed strategy not only met the requirement for structural large strain testing during the whole construction process, but also the intact FBG sensor still played a role in the subsequent prestressing loss monitoring.

Paper Details

Date Published: 5 October 2009
PDF: 4 pages
Proc. SPIE 7503, 20th International Conference on Optical Fibre Sensors, 75035G (5 October 2009); doi: 10.1117/12.834549
Show Author Affiliations
Sheng Li, Wuhan Univ. of Technology (China)
De-sheng Jiang, Wuhan Univ. of Technology (China)


Published in SPIE Proceedings Vol. 7503:
20th International Conference on Optical Fibre Sensors
Julian D. C. Jones, Editor(s)

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