DYNAMIC SHEAR STRENGTH OF ROCK JOINTS SUBJECTED TO IMPULSE LOADING
The shear testing of rock joints under impulse loading is studied in the present paper. Following the description of novel shear equipment which allows the shear tests to be carried out under both static and dynamic loading conditions, the results of tests on saw-cut surfaces are given, with attention being paid to the mechanical behaviour of rock discontinuities prior to peak strength in a stage where no irreversible shearing has yet occurred. The objective is to describe the initial dynamic strength of a rock discontinuity versus the shearing stress rate applied during the test. It is shown that: (i) under low normal stress and no initially mobilized strength, the dynamic shear strength is greater than the corresponding static value and is greater in relation to the higher shearing stress rate applied (ii) the dynamic to static shear strength ratio has a tendency to decrease as the mobilized shear strength prior to loading increases (iii) with the normal stress increasing, the dynamic influence on the shear strength reduces. (A)
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Availability:
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Corporate Authors:
The Boulevard, Langford Lane
Kidlington, Oxford United Kingdom OX5 1GB -
Authors:
- BARBERO
- BARLA
- ZANINETTI
- Publication Date: 1996-2
Language
- English
Media Info
- Features: References;
- Pagination: p. 141-51
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Serial:
- INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING & GEOMECHANICS ABSTRACTS
- Volume: 33
- Issue Number: 2
- ISSN: 0148-9062
Subject/Index Terms
- TRT Terms: Loads; Rock jointing; Rock mechanics; Shear strength; Strength of materials; Tests
- ITRD Terms: 4089: Joint (geomorphol); 5567: Load; 5757: Rock mechanics; 5531: Shear; 5544: Strength (mater); 6255: Test
- Subject Areas: Geotechnology;
Filing Info
- Accession Number: 00723158
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- Files: ITRD
- Created Date: Jul 26 1996 12:00AM