Calibration of Testing Equipment for Reliable Small-Strain Deformation Measurements Using Synthetic Specimens

    Volume 23, Issue 4 (December 2000)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Page Count: 10


    Kim, D-S
    Associate professor, Korea Advanced Institute of Science and Technology, Taejon,

    Kweon, G-C
    Assistant professor, Dong-Eui University,

    (Received 9 March 1998; accepted 2 June 2000)

    Abstract

    For reliable deformation measurements at small strains, calibration of the entire testing system in addition to routine transducer calibrations are very important. Seven synthetic specimens of varying stiffness (4.3 to 1500 MPa) were constructed and tested to measure the compliance of testing equipment and to improve the measurement setups. Testing equipment used in this study included resonant column device (RC), torsional shear device (TS), free-free resonant column device (FF-RC), cyclic resilient modulus testing device (MR) and the static compression testing device. Moduli of synthetic specimens determined by various testing equipment after improvement were almost identical if considered the effect of loading frequency, indicating that all of the testing devices were well calibrated over a wide stiffness range. To verify the effectiveness of calibration on soil testing, two subgrade soils were tested, and moduli determined by various tests compared well. Use of synthetic calibration specimens shows potential for calibrating testing equipment and determining its capability and limitation of small-strain deformation measurements.


    Paper ID: GTJ11066J

    DOI: 10.1520/GTJ11066J

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    Author
    Title Calibration of Testing Equipment for Reliable Small-Strain Deformation Measurements Using Synthetic Specimens
    Symposium , 0000-00-00
    Committee D18