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A platform for research: civil engineering, architecture and urbanism
Fiber optic structural monitoring system of concrete beam retrofitted by composite patches
In order to extend the life time of building and civil infra-structure, nowadays, patch type fibrous composite retrofitting materials are widely used. Retrofitted concrete columns and beams gain the stiffness and strength, but they lose toughness and show brittle failure. Usually, the cracks of concrete structures are visible with naked eyes and the status of the structure in the life cycle is estimated with visible inspection. After retrofitting of the structure, crack visibility is blocked by retrofitted composite materials. Therefore, structural monitoring after retrofitting is indispensable and self diagnosis method with optical fiber sensor is very useful. In this paper, we try to detect peel out effect and find the strain difference between main structure and retrofitting patch material when they separate each other. In the experiment, two fiber optic Bragg grating sensors are applied to the main concrete structure and the patching material separately at the same position. The sensors show coincident behaviors at the initial loading, but different behaviors after a certain load.
Fiber optic structural monitoring system of concrete beam retrofitted by composite patches
In order to extend the life time of building and civil infra-structure, nowadays, patch type fibrous composite retrofitting materials are widely used. Retrofitted concrete columns and beams gain the stiffness and strength, but they lose toughness and show brittle failure. Usually, the cracks of concrete structures are visible with naked eyes and the status of the structure in the life cycle is estimated with visible inspection. After retrofitting of the structure, crack visibility is blocked by retrofitted composite materials. Therefore, structural monitoring after retrofitting is indispensable and self diagnosis method with optical fiber sensor is very useful. In this paper, we try to detect peel out effect and find the strain difference between main structure and retrofitting patch material when they separate each other. In the experiment, two fiber optic Bragg grating sensors are applied to the main concrete structure and the patching material separately at the same position. The sensors show coincident behaviors at the initial loading, but different behaviors after a certain load.
Fiber optic structural monitoring system of concrete beam retrofitted by composite patches
Kim, Ki-Soo (author) / Chung, Chul (author) / Kim, Hwa-Joog (author)
Smart Structures and Materials 2003: Industrial and Commercial Applications of Smart Structures Technologies ; 2003 ; San Diego,California,United States
Proc. SPIE ; 5054
2003-08-14
Conference paper
Electronic Resource
English
Fiber optic smart monitoring of concrete beam retrofitted by composite patches
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