### Abstract

The paper presents findings of an experimental as well as theoretical/analytical research initiated (a) to quantify joint surface roughness on a plane and then (b) to develop a new peak shear strength criterion for rock joints which has the capability of capturing the anisotropic behavior of peak shear strength due to the anisotropy of joint surface roughness. The results show clearly that at least two parameters are required to quantify joint roughness in one dimension. By limiting to only statistical parameters, an average slope of the profile (average I angle) is suggested to quantify the large scale undulations of the profile (non-stationary part of the profile) and the root mean square of the slope (z_{2}) is suggested to quantify the small scale roughness of the profile (stationary part of the profile). In order to capture the anistropic roughness, it was found necessary to calculate both averages I and z_{2}' in different directions on the joint surface. The shear strength results of a model material joint show that the suggested new equation, which is based on very limited experimental data, has a good capability of predicting the anisotropic peak shear strength of the joints.

Original language | English (US) |
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Pages | 565-572 |

Number of pages | 8 |

State | Published - Jan 1 1994 |

Event | 1st North American Rock Mechanics Symposium, NARMS 1994 - Austin, United States Duration: Jun 1 1994 → Jun 3 1994 |

### Other

Other | 1st North American Rock Mechanics Symposium, NARMS 1994 |
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Country | United States |

City | Austin |

Period | 6/1/94 → 6/3/94 |

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### ASJC Scopus subject areas

- Geochemistry and Petrology
- Geophysics

### Cite this

*A new empirical peak shear strength criterion for rock joints*. 565-572. Paper presented at 1st North American Rock Mechanics Symposium, NARMS 1994, Austin, United States.

**A new empirical peak shear strength criterion for rock joints.** / Kulatilake, Pinnaduwa; Shou, Guohua; Morgan, Robert M.; Huang, Tsan Hwei.

Research output: Contribution to conference › Paper

}

TY - CONF

T1 - A new empirical peak shear strength criterion for rock joints

AU - Kulatilake, Pinnaduwa

AU - Shou, Guohua

AU - Morgan, Robert M.

AU - Huang, Tsan Hwei

PY - 1994/1/1

Y1 - 1994/1/1

N2 - The paper presents findings of an experimental as well as theoretical/analytical research initiated (a) to quantify joint surface roughness on a plane and then (b) to develop a new peak shear strength criterion for rock joints which has the capability of capturing the anisotropic behavior of peak shear strength due to the anisotropy of joint surface roughness. The results show clearly that at least two parameters are required to quantify joint roughness in one dimension. By limiting to only statistical parameters, an average slope of the profile (average I angle) is suggested to quantify the large scale undulations of the profile (non-stationary part of the profile) and the root mean square of the slope (z2) is suggested to quantify the small scale roughness of the profile (stationary part of the profile). In order to capture the anistropic roughness, it was found necessary to calculate both averages I and z2' in different directions on the joint surface. The shear strength results of a model material joint show that the suggested new equation, which is based on very limited experimental data, has a good capability of predicting the anisotropic peak shear strength of the joints.

AB - The paper presents findings of an experimental as well as theoretical/analytical research initiated (a) to quantify joint surface roughness on a plane and then (b) to develop a new peak shear strength criterion for rock joints which has the capability of capturing the anisotropic behavior of peak shear strength due to the anisotropy of joint surface roughness. The results show clearly that at least two parameters are required to quantify joint roughness in one dimension. By limiting to only statistical parameters, an average slope of the profile (average I angle) is suggested to quantify the large scale undulations of the profile (non-stationary part of the profile) and the root mean square of the slope (z2) is suggested to quantify the small scale roughness of the profile (stationary part of the profile). In order to capture the anistropic roughness, it was found necessary to calculate both averages I and z2' in different directions on the joint surface. The shear strength results of a model material joint show that the suggested new equation, which is based on very limited experimental data, has a good capability of predicting the anisotropic peak shear strength of the joints.

UR - http://www.scopus.com/inward/record.url?scp=84937752659&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84937752659&partnerID=8YFLogxK

M3 - Paper

SP - 565

EP - 572

ER -