Rock Mechanics and Rock Engineering

, Volume 43, Issue 5, pp 597–613 | Cite as

Experimental Validation of Modified Barton’s Model for Rock Fractures

  • Pooyan Asadollahi
  • Marco C. A. Invernizzi
  • Simone Addotto
  • Fulvio Tonon
Original Paper

Abstract

Among the constitutive models for rock fractures developed over the years, Barton’s empirical model has been widely used. Although Barton’s failure criterion predicts peak shear strength of rock fractures with acceptable precision, it has some limitations in estimating the peak shear displacement, post-peak shear strength, dilation, and surface degradation. The first author modified Barton’s original model in order to address these limitations. In this study, the modified Barton’s model (the peak shear displacement, the shear stress–displacement curve, and the dilation displacement) is validated by conducting a series of direct shear tests.

Keywords

Rock fracture constitutive model Barton’s empirical model Shear strength Dilatancy Shear stiffness 

Notes

Acknowledgments

Simone Adotto and Marco Invernizzi conducted this research as part of their MS theses over a 6-month period spent at the University of Texas (UT) at Austin when they were sponsored by the Polytechnic of Turin, Italy. Professor Daniele Peila, DITAG, Polytechnic of Turin co-advised Simone Adotto and Marco Invernizzi and found the funds necessary for supporting their stay at UT Austin.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Pooyan Asadollahi
    • 1
  • Marco C. A. Invernizzi
    • 2
  • Simone Addotto
    • 2
  • Fulvio Tonon
    • 1
  1. 1.Department of Civil EngineeringUniversity of TexasAustinUSA
  2. 2.Land, Environment, and Geo-Engineering DepartmentTurin PolytechnicTurinItaly

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