Utilization of fiber-optic Bragg grating sensors in concrete columns confined with glass fiber reinforced plastic (GFRP) laminate under uni-axial compression test

Peter K C Chan, K. T. Lau, Wei Jin, Li Min Zhou

Research output: Journal article publicationConference articleAcademic researchpeer-review

4 Citations (Scopus)


In this paper, we report results of experimental studies on strain monitoring by using fiber Bragg grating sensors in concrete structures. The strain variation of the specimen under different loading conditions were monitored by the Fiber-optic Bragg Grating (FBG) sensors. The FBG sensors have been pre-installed in the structure by embedding either inside the concrete specimen or at the interface between the concrete and the composites. The strain reading from the fiber grating sensor compares favourably with that obtained from the conventional strain gauge in uni-axial compression testing. The test results generally indicated that the concrete structures (with and without notch formation) can be strengthened significantly by wrapping with glass fiber composites. The sensor embedded at the notch tip provides a very good indication of the health condition of the strengthened structure, especially in high stress concentration area. The strain sensitivity by using FBG sensor is 67 με.
Original languageEnglish
Pages (from-to)64-72
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - 1 Jan 1999
EventProceedings of the 1998 Process Monitoring with Optical Fibers and Harsh Environment Sensors - Boston, MA, United States
Duration: 1 Jan 1999 → …

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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