A Methodology for Monitoring Prestressed Force of Bridges Using OFS-embedded Strand

광섬유센서가 내장된 강연선을 이용한 교량의 장력 모니터링 방법

  • 김현우 (전남대학교 건설.환경공학과) ;
  • 김재민 (전남대학교 건설.환경공학부) ;
  • 김진원 (전남대학교 건설.환경공학과) ;
  • 김영상 (전남대학교 건설.환경공학부) ;
  • 윤정방 (KAIST 건설 및 환경공학과)
  • Published : 2008.04.17


This study proposes a novel method for in-service evaluation of force in an external prestressing 7-wire tendon which is employed for retrofitting bridge superstructure. For this propose, a smart strand 7.0m long whose king wire is replaced by a steel tube and the FBG sensor, is developed. Performance of the strand is demonstrated through loading-unloading tests for a RC T-shaped beam 6.4m long. Finally, a couple of test results are presented to discuss effect of temperature change in the FBG sensor.