Share Email Print
cover

Proceedings Paper

Integrity monitoring of an old steel bridge using fiber optic distributed sensors based on Brillouin scattering
Author(s): Branko Glišić; Daniele Posenato; Daniele Inaudi
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Götaälvbron, the bridge over Göta river, was built in thirties and is now more than seventy years old. The steel girders were cracked and two issues are in cause of steel cracking: fatigue and mediocre quality of the steel. The bridge authorities repaired the bridge and decided to keep it in service for the next fifteen years, but in order to increase the safety and reduce uncertainties related to the bridge performance an integrity monitoring system has been mandatory. The main issue related to selection of the monitoring system has been the total length of the girders which is for all the nine girders more than 9 km. It was therefore decided to monitor the most loaded five girders (total length of 5 km approximately) and logically a fiber optic distributed sensing system have been selected. For the first time a truly distributed fiber optic sensing system, based on Brillouin scattering effect, is employed on such large scale to monitor new crack occurrence and unusual strain development. The monitoring system itself, the monitoring strategy, challenges related to installation and the data management are presented in this paper.

Paper Details

Date Published: 19 April 2007
PDF: 8 pages
Proc. SPIE 6531, Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007, 65310P (19 April 2007); doi: 10.1117/12.716055
Show Author Affiliations
Branko Glišić, Smartec SA (Switzerland)
Daniele Posenato, Smartec SA (Switzerland)
Daniele Inaudi, Smartec SA (Switzerland)


Published in SPIE Proceedings Vol. 6531:
Nondestructive Characterization for Composite Materials, Aerospace Engineering, Civil Infrastructure, and Homeland Security 2007
H. Felix Wu; Aaron A. Diaz; Peter J. Shull, Editor(s)

© SPIE. Terms of Use
Back to Top