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    A direction-dependent shear strength criterion for rock joints with two new roughness parameters

    Access Status
    Fulltext not available
    Authors
    Ban, L.
    Qi, C.
    Lu, Chunsheng
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Ban, L. and Qi, C. and Lu, C. 2018. A direction-dependent shear strength criterion for rock joints with two new roughness parameters. Arabian Journal of Geosciences. 11 (16): Article ID 466.
    Source Title
    Arabian Journal of Geosciences
    DOI
    10.1007/s12517-018-3818-6
    ISSN
    1866-7511
    School
    School of Civil and Mechanical Engineering (CME)
    URI
    http://hdl.handle.net/20.500.11937/72292
    Collection
    • Curtin Research Publications
    Abstract

    The surface morphology of a rock joint is closely related to its mechanical properties. To reasonably characterize a rock surface, two new roughness parameters were proposed in this paper. One is related to the average slope angle of asperities that contribute to the shear strength, and the other reflects the frictional behavior of asperities that is defined as the maximum possible contact area in the shear direction. Taking the standard joint roughness coefficient profiles as example, these two roughness parameters can be applied to describe the directional characteristics of shear strength. Based on their relationships with initial dilation angles, the proposed roughness parameters were incorporated into a peak shear strength criterion. It is shown that the predicted peak shear strength is consistent with experimental data, and there is a power–law relationship. The application range of new roughness parameters was determined, which may facilitate a measurement process.

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