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    Volume 48, Issue 6 (November 2020)

    Distributed Strain Sensing to Study a Composite Liner for Cast Iron Water Pipe Rehabilitation

    (Received 22 August 2017; accepted 20 August 2018)

    Published Online: 2019

    CODEN: JTEVAB

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    Abstract

    The use of cured-in-place pipe lining systems for the rehabilitation of cast iron water pressure pipe has grown significantly in the past 20 years. With limited information on the performance of these lining systems in service, strain measurements are needed to evaluate theoretical findings about three-dimensional strength limits. The application of distributed optical fiber sensing to study the properties of a polymer composite liner was investigated in this research. Polyimide optical fibers were installed into flat liner coupons fabricated in the laboratory, and the specimens were subsequently tested in uniaxial tension and four-point bending. Using optical frequency domain reflectometry, Rayleigh backscatter was monitored from preinstalled optical fiber sensors and strains of up to 4,000 μϵ were obtained. Comparisons between experimental optical fiber measurements and results obtained from conventional strain measurement techniques (i.e., extensometer and crosshead displacement) showed a strong correlation with an average difference of 3 % in four-point bending and 6 % in tension. However, the orientation and diameter of the composite fiber reinforcements were observed to affect distributed sensing performance.

    Author Information:

    Adebola, Titilope O.
    Department of Civil Engineering, Queen’s University, Kingston, ON

    Hoult, Neil
    Department of Civil Engineering, Queen’s University, Kingston, ON

    Moore, Ian D.
    Department of Civil Engineering, GeoEngineering Centre at Queen’s Royal Military College, Queen’s University, RMC, Kingston, ON


    Stock #: JTE20170497

    ISSN:0090-3973

    DOI: 10.1520/JTE20170497

    Author
    Title Distributed Strain Sensing to Study a Composite Liner for Cast Iron Water Pipe Rehabilitation
    Symposium ,
    Committee F17