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Geotechnical and Geological Engineering

, Volume 32, Issue 2, pp 321–335 | Cite as

An Elasto-Plastic Constitutive Model for Rock Joints Under Cyclic Loading and Constant Normal Stiffness Conditions

  • Jan Nemcik
  • Ali MirzaghorbanaliEmail author
  • Naj Aziz
Original paper

Abstract

An elasto-plastic constitutive model is introduced for rock joints under cyclic loading, considering the additional shear resistance generated by the asperity damage in the first forward shear cycle and sliding mechanism for further shearing. A series of cyclic loading direct shear tests was conducted on artificial joints with triangular asperities and replicas of a real rock asperity surface under constant normal stiffness (CNS) conditions. The model was calibrated and then validated using selected data sets from the experimental results. Model simulations were found to be in good agreement with the rock joints behaviour under cyclic loading and CNS conditions both in stress prediction and dilation behaviour. In addition, dynamic stability analysis of an underground structure was carried out, using Universal Distinct Element Code and the proposed constitutive model.

Keywords

Rock joints Shear behaviour Cyclic loading Constant normal stiffness conditions 

Notes

Acknowledgments

The financial support of the University of Wollongong for the research presented in this paper is gratefully acknowledged. The authors also wish to thank Mr. Alan Grant at Engineering School of University of Wollongong for his assistance during laboratory work.

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.School of Civil, Mining, and Environmental EngineeringUniversity of WollongongWollongongAustralia

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