Analysis of pile load transfer using optical fiber sensor

Jeong-Ho Oh; Wonje Lee; Sang Bae Lee; Woojin Lee

doi:10.1117/12.383156

20 April 2000 Analysis of pile load transfer using optical fiber sensor

Jeong-Ho Oh, Wonje Lee, Sang Bae Lee, Woojin Lee

Proceedings Volume 3988, Smart Structures and Materials 2000: Smart Systems for Bridges, Structures, and Highways; (2000) https://doi.org/10.1117/12.383156
Event: SPIE's 7th Annual International Symposium on Smart Structures and Materials, 2000, Newport Beach, CA, United States

Abstract

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 wavelengths 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.

Citation Download Citation

Jeong-Ho Oh, Wonje Lee, Sang Bae Lee, and Woojin Lee "Analysis of pile load transfer using optical fiber sensor", Proc. SPIE 3988, Smart Structures and Materials 2000: Smart Systems for Bridges, Structures, and Highways, (20 April 2000); https://doi.org/10.1117/12.383156

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