The purpose of this study was to develop a carbon fiber sheet with embedded fiber optic sensor for maintenance and performance improvement of aged concrete bridges. The carbon fiber sheet reinforcement method can separate the concrete and the carbon fiber sheet, so it is necessary to investigate the bond performance level. However, separation of concrete and carbon fiber sheet and investigation of concrete scaling phenomenon are carried out by human, so it is difficult to secure objectivity and accurate investigation. Therefore, in this study, a method to confirm the bond level of carbon fiber sheet by reinforcing with a carbon fiber sheet with a fiber optic sensor was examined. In this study, we investigated the strain of fiber optic sensor embedded in carbon fiber sheet to identify the separate point of carbon fiber sheet. The strain measured by fiber optic sensor was measured by numerical analysis. The strain rate of the carbon fiber sheet was compared with that of the carbon fiber sheet. As a result, it was confirmed that the strain was changed at the point where the carbon fiber sheet was separated, and the strain occurred in the carbon fiber sheet was examined to predict the separate point.

Abstract
 1. 서 론
 2. FOS 내장 탄소섬유시트 보강공법 개요
 3. 탄소섬유시트 보강 콘크리트 보의구조적 거동
  3.1 탄소섬유시트의 설계인장강도
  3.2 탄소섬유시트의 시공단계 해석
 4. FOS 내장형 탄소섬유시트 보강 콘크리트보의 수치해석적 검토
  4.1 보강 후 탄소섬유시트의 인장 거동 해석 조건
  4.2 보강 후 탄소섬유시트의 인장 거동 해석 결과
  4.3 FOS 내장형 탄소섬유시트의 탈락 지점 예측
  4.4 FOS 내장형 탄소섬유시트의 탈락 지점 예측결과
 5. 결 론
 REFERENCES

• 박준석(한국건설기술연구원 노후인프라연구센터 박사후연구원) | Park Joon-Seok (Post Doc, Sustainable Infrastructure Research Center)
• 김병철(한국건설기술연구원 노후인프라연구센터 전임연구원) | Kim Byung-Cheol (Research Specialist, Sustainable Infrastructure Research Center)
• 박기태(한국건설기술연구원 노후인프라연구센터 선임연구위원) | Park Ki-Tae (Senior Research Fellow, Sustainable Infrastructure Research Center)
• 정규산(한국건설기술연구원 노후인프라연구센터 박사후연구원) | Jung Kyu-san (Post Doc, Sustainable Infrastructure Research Center) Corresponding author