Analysis of pile load transfer using optical fiber sensor

Jeong Ho Oh, Won Jae Lee, Sang Bae Lee, Woojin Lee

Research output: Chapter in Book/Report/Conference proceedingChapter

7 Citations (Scopus)


Distribution of axial strain in model piles was measured by Fiber Bragg Grating (FBG) sensor to investigate a possibility of measuring and analyzing the load transfer mechanism of pile foundation by Fiber Optic Sensor (FOS) system. Since FBG of different wave lengths can be multiplexed in an optical fiber, the installation of sensor system and the measurement of strains are relatively simple compared with the system consisted of strain gages. In this study, FBG sensors and electric strain gages were embedded in the piles and the distributions of load transfer measured by two sensor systems were compared. It was observed from the test results that the magnitudes of axial load measured by both systems showed insignificant difference and that the distributions of axial load by FBG were smoother than those by strain gage. Under the environments of laboratory testing, survival rate of embedded FBG system was higher than that of strain gage. Therefore, it was concluded that the use of FBG sensor has a great potential for the measurement of pile load transfer with accuracy.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Number of pages10
Publication statusPublished - 2000
EventSmart Structures and Materials 2000: Smart Systems for Bridges, Structures, and Highways - Newport Beach, CA, USA
Duration: 2000 Mar 62000 Mar 7


OtherSmart Structures and Materials 2000: Smart Systems for Bridges, Structures, and Highways
CityNewport Beach, CA, USA

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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