Original paper(Vol.47 No.11 pp.1178)

On sensor and actuator for intelligent structure of concrete reinforced by CFRP

Zako Masaru; Takano Naoki; Fujioka Hidenori

Abstract:When CFRP lamina is applied for the reinforcement of concrete structures, the lamina has a possibility to delaminate from the surface of concrete. The delamination must be detected and be repaired as soon as possible for the reliability of structures. In pursuit of this, an intelligent structure was proposed in this paper. Both sensor and actuator are required to detect and to repair the delamination, respectively. As the intelligent structure, optical fiber was used to detect the delamination of CFRP as a sensor. Epoxy resin adhesive in a capsule was used to repair the delamination as an actuator.
In the first paper, characteristics of both sensor and actuator were investigated. The brightness of transmitted light in the optical fiber was decreased at bended point caused by delamination of CFRP. On the other hand, the capsuled epoxy resin has been spreaded widely into delaminated interface. As a result, it was recognized that the proposed sensor and actuator can be used to detect and repair the delamination of CFRP.

Key Words:intelligent structure, optical fiber sensor, actuator, CFRP, Epoxy