Fiber Bragg Grating Strain Sensing in Reinforced Concrete Beams

광섬유 BRAGG GRATING SENSOR를 이용한 철근 콘크리트 보의 변형 측정

  • 김지상 (서경대학교 이공대학 토목공학과) ;
  • 이상배 (한국과학기술연구원 광기술연구센터) ;
  • 김남식 (현대건설주식회사 기술연구소)
  • Published : 2001.05.01

Abstract

Fiber Bragg Grating sensors currently attract a great deal of attentions, mainly due to their potentials in health monitoring for civil structures and composite materials. In this experimental study, the strains of reinforced concrete beams were measured to failure In order to verify the applicability of FBG(Fiber Bragg Grating) sensors. The FBG sensors were directly buried in concrete and attached to re-bars at the time of fabrication. In this experiment, the changes of strains in concrete and re-bars were successfully measured as the movement in wavelength of light signals. The FBG sensors may be a very effective tool to investigate the behavior inside of reinforced concrete structures.

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