1. Dynamic Brillouin Scattering–Based Condition Assessment of Cables in Cable-Stayed Bridges
- Author
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Saeed Babanajad, Farhad Ansari, Alice Scarella, Giancarlo Salamone, and Alessandro De Stefano
- Subjects
Engineering ,business.industry ,020101 civil engineering ,02 engineering and technology ,Building and Construction ,Structural engineering ,Condition assessment ,0201 civil engineering ,Deck ,Bridge deck ,020210 optoelectronics & photonics ,Fiber optic sensor ,Brillouin scattering ,0202 electrical engineering, electronic engineering, information engineering ,Time domain ,Cable stayed ,Structural health monitoring ,business ,Civil and Structural Engineering - 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...
- Published
- 2017
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