How strain- and strain-rate- weakening of rupture-surface strength affects rapid landslides explored through numerical models of the 2009 Jiweishan rock avalanche

Rapid sliding in a rock avalanche may occur from strain- and strain-rate- weakening of the rupture-surface strength. However, existing research on rock-avalanche dynamics pays little attention to rupture-surface weakening. In this paper, we used high-speed-friction tests on limestone and shale of th...

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Bibliographic Details
Published in:Engineering geology 2022-06, Vol.303, p.106668, Article 106668
Main Authors: Yang, Long, Zhang, Ming, Zhang, Chenyang, Wang, Zhengbo, Li, Weichao, Wu, Youyin, Wang, Luqi, Yan, Guoqiang
Format: Article
Language:English
Subjects:
Numerical modeling
Rock avalanche
Rupture surface
Strain-rate-weakening
Strain-weakening
Transport distance
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Summary:Rapid sliding in a rock avalanche may occur from strain- and strain-rate- weakening of the rupture-surface strength. However, existing research on rock-avalanche dynamics pays little attention to rupture-surface weakening. In this paper, we used high-speed-friction tests on limestone and shale of the Qixia Formation to determine strain- and strain-rate- weakening of the rupture surface of the Jiweishan rock avalanche. The strain- and strain-rate- weakening model inferred that the friction coefficient of the rupture surface decreased rapidly to a residual value of
ISSN:0013-7952
1872-6917
DOI:10.1016/j.enggeo.2022.106668