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Prediction of shear behaviour of joints using profiles

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Summary

The nature of roughness scale effects and the limited use of simple regular profiles are discussed. Some details of the empirical Barton-Bandis and Ladanyi-Archambault models are critically reviewed. It is shown that true roughness amplitude exhibits an increasing magnitude with scale in contrast to the Barton-Bandis model.

Generalized relationships between stress, displacement, and compliance are developed for a joint at the commencement of sliding. the relationships are derived using a new fundamental approach based upon profilometry, Hertzian contact theory and the laws of friction. Predictions for an interlocked slate joint and a mismatched granite joint agree well with experiment. An as yet unconfirmed nominal scale effect upon shear compliance is predicted, the latter increasing with joint area.

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Authors and Affiliations

  1. Canmet, Elliot Lake, Ontario, Canada

    G. Swan & S. Zongqi

  2. Central-South Institute of Mining and Metallurgy, Changsha, China

    G. Swan & S. Zongqi

Authors
  1. G. Swan
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  2. S. Zongqi
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Swan, G., Zongqi, S. Prediction of shear behaviour of joints using profiles. Rock Mech Rock Engng 18, 183–212 (1985). https://doi.org/10.1007/BF01112506

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