Rate-weakening friction characterizes both slow sliding and catastrophic failure of landslides
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- Alexander L. Handwerger
- Department of Geological Sciences, University of Oregon, Eugene, OR 97403;
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- Alan W. Rempel
- Department of Geological Sciences, University of Oregon, Eugene, OR 97403;
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- Rob M. Skarbek
- Department of Geological Sciences, University of Oregon, Eugene, OR 97403;
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- Joshua J. Roering
- Department of Geological Sciences, University of Oregon, Eugene, OR 97403;
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- George E. Hilley
- Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305
説明
<jats:title>Significance</jats:title><jats:p>A predictive understanding of landslide behavior remains elusive, to the extent that once landslide motion is detected the factors that control whether motion will remain slow or accelerate to catastrophic failure remain uncertain. Here, we adapt standard fault mechanics treatments to present a single model that captures both slow and catastrophic landslide motion. We test model predictions using field, laboratory, and remote sensing observations. The failure mode depends on the material properties and the dimensions of the landslide slip surface relative to a critical size. If the slip surface exceeds this size and has rate-weakening frictional properties then catastrophic failure must occur. However, landslides composed of rate-weakening material are characterized by slow sliding when the critical size exceeds landslide dimensions.</jats:p>
収録刊行物
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- Proceedings of the National Academy of Sciences
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Proceedings of the National Academy of Sciences 113 (37), 10281-10286, 2016-08-29
Proceedings of the National Academy of Sciences
