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Dynamic Brillouin Scattering–Based Condition Assessment of Cables in Cable-Stayed Bridges

Dynamic Brillouin Scattering–Based Condition Assessment of Cables in Cable-Stayed Bridges

Authors :
Saeed Babanajad
Farhad Ansari
Alice Scarella
Giancarlo Salamone
Alessandro De Stefano
Source :
Journal of Bridge Engineering. 22
Publication Year :
2017
Publisher :
American Society of Civil Engineers (ASCE), 2017.

Abstract

A method for structural health monitoring of cable-stayed bridges based on the dynamic distributed sensing of bridge deck strains is introduced in this article. The objective is to detect the location and the magnitude of the cables that have totally or partially lost their tensile load-carrying capacities. Dynamic sensing provides a realistic approach for condition assessment of the bridge under operational conditions. A Brillouin scattering optical time domain analysis (BOTDA) fiber-optic sensor was used to monitor the distributed strain in the deck of a scaled model cable-stayed bridge in the laboratory. The formulations developed in the present study take advantage of the dynamic distributed sensing capability of the BOTDA in amplitude transfer (AT) mode for the establishment of a relationship between the redistribution of deck strains and the tension loss in the individual cables of cable-stayed bridges. The experimental program involved single cable and multicable damage scenarios. The appli...

Details

ISSN :
19435592 and 10840702
Volume :
22
Database :
OpenAIRE
Journal :
Journal of Bridge Engineering
Accession number :
edsair.doi...........84d72510c6644804055b5495c00d8319
Full Text :
https://doi.org/10.1061/(asce)be.1943-5592.0001010