Developing a generalized multiple-step loading damage model to predict rock behaviour during multiple-step loading triaxial compression test
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(Published version)
Date
2009
Authors
Taheri, A.
Tani, K.
Editors
Hamza, M.
Shahien, M.
El-Mossallamy, Y.
Shahien, M.
El-Mossallamy, Y.
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Conference paper
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Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering, 2009 / Hamza, M., Shahien, M., El-Mossallamy, Y. (ed./s), vol.1, pp.429-432
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A, Taheri, K.Tani
Conference Name
17th International Conference on Soil Mechanics and Geotechnical Engineering (ICSMGE) (5 Oct 2009 - 9 Oct 2009 : Alexandria, Egypt)
Abstract
Multiple-step Loading Triaxial Compression Test (ML-TCT) method is a useful tool to evaluate strength parameters from a single specimen. However, because of accumulated damage in the specimen with repeated cycles of axial loading/unloading, the shear strength is prone to be underestimated. Therefore, considering two models which were previously developed for a siltstone and a mudstone, a generalized Multiple-step Loading Damage (MLD) model was developed to simulate ML-TCTs with various stress paths. Numerical simulations of generalized MLD model indicated that the margin between shear strength parameters determined by Single-step Loading Triaxial Compression Tests (SL-TCT) and ML-TCTs, increase with increasing rock strength. Moreover, the upper bound values for c′ and lower bound values for ф′ could be resulted for ML-TCTs with confining pressure in increasing manner. Whereas, the upper bound values for ф′ and lower bound values for c′ can be obtained for decreasing manner tests.
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© 2009 IOS Press. This work is licensed under a creative commons license https://creativecommons.org/licenses/by-nc/3.0/