Abstract
Despite of extensive efforts made by many researchers, the mechanisms involved in rapid, dry, dense granular flows are thought only understood in broad line. In this paper, Discontinuous Deformation Analysis (DDA) was applied to simulate some experimental flows in a large flume and a large rock avalanche triggered by the Wenchuan earthquake, as a step to make clear some mechanisms in rock avalanches. Simulated results show that DDA was able to capture essential characteristics of granular flows and friction coefficient was a key parameter in the numerical analysis. Furthermore, the apparent friction coefficient, which was determined by field investigation, served as a reasonable parameter to reproduce the field event, rather than the friction coefficient measured in the laboratory.
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Yang, Q., Cai, F., Ugai, K., Su, Z., Xu, L. (2013). Numerical Simulation of Granular Flows by DDA. In: Ugai, K., Yagi, H., Wakai, A. (eds) Earthquake-Induced Landslides. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-32238-9_69
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DOI: https://doi.org/10.1007/978-3-642-32238-9_69
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