Volume 37, Issue 2 (March 2014)

    Rock Mass Dynamic Test Apparatus for Estimating the Strain-Dependent Dynamic Properties of Jointed Rock Masses

    (Received 27 June 2012; accepted 21 October 2013)

    Published Online: 2014

    CODEN: GTJOAD

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    Abstract

    A rock mass dynamic test (RMDT) apparatus was developed to estimate the strain-dependent dynamic properties (i.e. shear modulus and damping ratio) of jointed rock masses over a wide range of shear strains from 10−5 % to 10−2 %. The resonance and equipment-generated damping of the apparatus were investigated in detail. The dynamic properties obtained from the quasi-static resonant column tests were in agreement with those of the RMDT apparatus, which suggests that the developed RMDT apparatus is valid. Furthermore, the experimental test results on gneiss discs demonstrated that the dynamic properties of jointed rock masses are stress-dependent and strain-dependent, with similar trends to those of soil, whereas the elastic threshold strain of a jointed rock is significantly lower than that of soil.


    Author Information:

    Chong, Song-Hun
    Former Graduate Student, Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon,

    Kim, Joo-Won
    Engineer, Civil and Environment Division, POSCO Engineering & Construction Co., Ltd., Pohang,

    Cho, Gye-Chun
    Professor, Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon,


    Stock #: GTJ20120127

    ISSN: 0149-6115

    DOI: 10.1520/GTJ20120127

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    Author
    Title Rock Mass Dynamic Test Apparatus for Estimating the Strain-Dependent Dynamic Properties of Jointed Rock Masses
    Symposium , 0000-00-00
    Committee D18