Measurement of pile load transfer using the Fiber Bragg Grating sensor system

Woojin Lee, Won Je Lee, Sang Bae Lee, Rodrigo Salgado

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

A series of laboratory and field tests were performed to evaluate the applicability of an optical fiber sensor system in the instrumentation of piles. A multiplexed sensor system, constructed by arranging several Fiber Bragg Grating (FBG) sensors along a single line of optical fiber, is capable of measuring local axial strains as a function of wavelength shifts. The distributions of axial load in three model piles and a field test pile evaluated from the strains measured by FBG sensors are found to be comparable, in terms of both magnitude and trend, with those obtained from conventional strain gauges. This suggests that the FBG sensor system is an effective tool for the analysis of the axial load transfer in piles. The successful instrumentation of a soil-cement injected precast (SIP) pile using FBG sensors suggests that the use of these sensors in drilled shafts and other types of cast in situ concrete piles is feasible. With the rapid advance of optical fiber sensor technology, the economics of the use of optical fiber sensors in this type of instrumentation is expected to improve significantly in coming years.

Original languageEnglish
Pages (from-to)1222-1232
Number of pages11
JournalCanadian Geotechnical Journal
Volume41
Issue number6
DOIs
Publication statusPublished - 2004 Dec 1

Fingerprint

Fiber Bragg gratings
Piles
pile
sensor
Sensors
Fiber optic sensors
Axial loads
instrumentation
Cast in place concrete
Soil cement
Strain gages
fibre
Optical fibers
Wavelength
shaft
Economics
gauge
cement
wavelength
economics

Keywords

  • Fiber Bragg Grating sensor
  • Fiber optic sensor
  • Load transfer
  • Pile foundation

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

Cite this

Measurement of pile load transfer using the Fiber Bragg Grating sensor system. / Lee, Woojin; Lee, Won Je; Lee, Sang Bae; Salgado, Rodrigo.

In: Canadian Geotechnical Journal, Vol. 41, No. 6, 01.12.2004, p. 1222-1232.

Research output: Contribution to journalArticle

Lee, Woojin ; Lee, Won Je ; Lee, Sang Bae ; Salgado, Rodrigo. / Measurement of pile load transfer using the Fiber Bragg Grating sensor system. In: Canadian Geotechnical Journal. 2004 ; Vol. 41, No. 6. pp. 1222-1232.
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