Effects of fracture size and normal stress on the shear behavior of a fracture as estimated by mortar replica

A. A. Giwelli, K. Matsuki, K. Sakaguchi, Akihisa Kizaki, H. Sekino, K. Okatsu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The effects of fracture size and normal stress on the shear behavior of a fracture were investigated in the direct shear tests by using mortar fracture replicas of different sizes, which were produced from a tensile fracture created in granite. Monotonic shear loading was applied at normal stresses of 0.3 and 1MPa for shear displacements of 2 and 20 mm. The change in the surface topography was measured by using a profile measurement system with a laser profilometer to determine the evolution of surface damage and aperture during shear. The results showed that the standard deviation (SD) of the initial aperture during shear increases not only with fracture size but also with normal stress since the matedness decreases due to the fact that asperities are more damaged with normal stress. Consequently, the non-linearity in the closure curve during shear increases with normal stress.

Original languageEnglish
Title of host publicationHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics
Pages613-616
Number of pages4
Publication statusPublished - 2012 Feb 13
Event12th International Congress on Rock Mechanics of the International Society for Rock Mechanics, ISRM 2011 - Beijing, China
Duration: 2011 Oct 182011 Oct 21

Publication series

NameHarmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics

Other

Other12th International Congress on Rock Mechanics of the International Society for Rock Mechanics, ISRM 2011
CountryChina
CityBeijing
Period11/10/1811/10/21

Keywords

  • Lab testing
  • Rock joints
  • Rock mass
  • Rock properties

ASJC Scopus subject areas

  • Geology
  • Geotechnical Engineering and Engineering Geology

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  • Cite this

    Giwelli, A. A., Matsuki, K., Sakaguchi, K., Kizaki, A., Sekino, H., & Okatsu, K. (2012). Effects of fracture size and normal stress on the shear behavior of a fracture as estimated by mortar replica. In Harmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics (pp. 613-616). (Harmonising Rock Engineering and the Environment - Proceedings of the 12th ISRM International Congress on Rock Mechanics).