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Self Diagnosis Technique of Concrete Structure Repaired and Strengthened by Carbon fiber Sheets Using Optical fiber Sensors  

Kim, Ki-Soo (Graduate School of Venture, Hoseo University)
Publication Information
Journal of the Korean Society for Nondestructive Testing / v.23, no.2, 2003 , pp. 133-139 More about this Journal
Abstract
In order to extend the life time of building and civil infra-structure, nowadays, patch type fibrous composite materials are widely used. Repaired 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 repairing of the structure, crack visibility is blocked by repaired carbon sheets. Therefore, structural monitoring after repairing is indispensible and self diagnosis method with optical fiber sensor is very useful. In this paper, peel-out effects is detected with optical fiber sensors and the strain difference between main structure and repaired carbon sheets when they separate each other.
Keywords
concrete structure; carbon fiber sheet; repaired and strengthened; optical fiber sensor; self diagnosis;
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