Journal
ROCK MECHANICS AND ROCK ENGINEERING
Volume 43, Issue 5, Pages 597-613Publisher
SPRINGER WIEN
DOI: 10.1007/s00603-010-0085-6
Keywords
Rock fracture constitutive model; Barton's empirical model; Shear strength; Dilatancy; Shear stiffness
Funding
- Polytechnic of Turin, Italy
- DITAG, Polytechnic of Turin
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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.
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