• myGriffith
    • Staff portal
    • Contact Us⌄
      • Future student enquiries 1800 677 728
      • Current student enquiries 1800 154 055
      • International enquiries +61 7 3735 6425
      • General enquiries 07 3735 7111
      • Online enquiries
      • Staff phonebook
    View Item 
    •   Home
    • Griffith Research Online
    • Conference outputs
    • View Item
    • Home
    • Griffith Research Online
    • Conference outputs
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

  • All of Griffith Research Online
    • Communities & Collections
    • Authors
    • By Issue Date
    • Titles
  • This Collection
    • Authors
    • By Issue Date
    • Titles
  • Statistics

  • Most Popular Items
  • Statistics by Country
  • Most Popular Authors
  • Support

  • Contact us
  • FAQs
  • Admin login

  • Login
  • Determination of mobilized asperity parameters to define rock joint shear strength in low normal stress conditions

    Thumbnail
    View/Open
    103725_1.pdf (1.638Mb)
    Author(s)
    Kim, Dong Hyun
    Gratchev, Ivan
    Balasubramaniam, Bala
    Chung, Matthew
    Griffith University Author(s)
    Balasubramaniam, Bala B.
    Chung, Matthew
    Gratchev, Ivan
    Kim, Dong Hyun H.
    Year published
    2015
    Metadata
    Show full item record
    Abstract
    This paper describes the role of mobilized asperity angles in shear behaviour of weak rock joints based on the results of direct shear tests using roughness profiles in 1mm intervals. Matched joint sets of plaster casts, which simulate Barton's typical joint roughness profiles, are created for the tests. In order to simulate accurate asperities with the same intervals, special moulds are produced by a 3D printing technique. Based on the measured compressive strength of the plaster casts, the direct shear tests are performed under low normal stress conditions. The interpretation of the test data demonstrates a parameter ...
    View more >
    This paper describes the role of mobilized asperity angles in shear behaviour of weak rock joints based on the results of direct shear tests using roughness profiles in 1mm intervals. Matched joint sets of plaster casts, which simulate Barton's typical joint roughness profiles, are created for the tests. In order to simulate accurate asperities with the same intervals, special moulds are produced by a 3D printing technique. Based on the measured compressive strength of the plaster casts, the direct shear tests are performed under low normal stress conditions. The interpretation of the test data demonstrates a parameter which is the relationship between the mean values of mobilized asperity angles in damaged areas to the asperity component of Barton's shear strength criterion. In low normal stress conditions, Baton's criterion, combined with the proposed parameter, shows high correlation with the test results. This indicates that the shear behaviour of joints is governed by the partly mobilized asperities in low normal stress conditions. As a result, the parameter has a linear relationship with the joint roughness coefficients according to the normal stresses and the compressive strength of the plaster materials. As the parameter is obtained from the asperity angles estimated by 1mm intervals, this can correlate with measured roughness profiles obtained by manual or remote sensing methods. Keywords: JRC, average asperity angles, mobilized asperity parameter, 3D printing
    View less >
    Conference Title
    12th Australia New Zealand Conference on Geomechanics (ANZ 2015): The Changing Face of the Earth - Geomechanics & Human Influence
    Publisher URI
    https://www.isrm.net/conferencias/detalhes2.php?id=3272&show=conf
    Copyright Statement
    © 2015 AGS. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the conference's website for access to the definitive, published version.
    Subject
    Civil Geotechnical Engineering
    Publication URI
    http://hdl.handle.net/10072/69685
    Collection
    • Conference outputs

    Footer

    Disclaimer

    • Privacy policy
    • Copyright matters
    • CRICOS Provider - 00233E
    • TEQSA: PRV12076

    Tagline

    • Gold Coast
    • Logan
    • Brisbane - Queensland, Australia
    First Peoples of Australia
    • Aboriginal
    • Torres Strait Islander