Dynamic Tensile Failure of the Rock Interface Between Tuff and Basalt |
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| Authors: | Fei Yan Xia-Ting Feng Rong Chen Kaiwen Xia Changyu Jin |
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| Institution: | (1) State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Science, Wuhan, 430071, People’s Republic of China;(2) Department of Civil Engineering, Lassonde Institute, University of Toronto, Toronto, ON, M5S 1A4, Canada;(3) College of Science, National University of Defense Technology, Changsha, 410073, People’s Republic of China;(4) School of Resources and Civil Engineering, Northeastern University, Shenyang, 110004, People’s Republic of China; |
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| Abstract: | The dynamic tensile strength properties of the rock interface and its host rocks sampled from the Baihetan Hydropower Station
from Western China were measured using a split Hopkinson pressure bar (SHPB). The results were compared with those for its
two host rocks. The dynamic tensile strengths of the two host rocks, tuff and basalt have typical loading rate dependence.
However, the dynamic response of the rock interface is much more complicated and at a given loading rate, varies between those
of tuff and basalt. To explain the observation, numerical simulation using the discrete element method (DEM) was conducted
to determine the detailed tensile failure process of the rock interface. The numerical simulation verifies that the variation
of the dynamic tensile strength of the rock interface is a result of the variation of the interface geometry. |
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