A depth‐integrated, coupled SPH model for flow‐like landslides and related phenomena
A depth‐integrated, coupled SPH model for flow‐like landslides and related phenomena
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DOI：
10.1002/nag.705
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发表时间：
2009-02
影响因子：
4
通讯作者：
Manuel Pastor;B. Haddad;G. Sorbino;S. Cuomo;V. Drempetic
中科院分区：
文献类型：
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作者：
Manuel Pastor;B. Haddad;G. Sorbino;S. Cuomo;V. Drempetic
在过去的几十年里，流状灾害性滑坡在世界各地造成了许多受害者和重要的经济损失。因此，重要的是预测它们的路径、速度和深度，以便提供适当的缓解和保护措施。本文提出了一个考虑孔隙压力与崩塌块体内部固体骨架之间的耦合作用的模型。从土壤动力学中使用的Biot-Zienkiewicz模型的速度-压力版本导出了一个深度集成的、耦合的数学模型。这些方程由描述土体特性的简单流变学方程补充，并用SPH方法离散。利用一系列基准对该模型的精度进行了评估，并利用该模型对一些已有现场资料的灾害性流状斜坡运动的传播阶段进行了反分析。版权所有©2008 John Wiley&Sons，Ltd.
In the past decades, flow‐like catastrophic landslides caused many victims and important economic damage around the world. It is therefore important to predict their path, velocity and depth in order to provide adequate mitigation and protection measures. This paper presents a model that incorporates coupling between pore pressures and the solid skeleton inside the avalanching mass. A depth‐integrated, coupled, mathematical model is derived from the velocity–pressure version of the Biot–Zienkiewicz model, which is used in soil dynamics. The equations are complemented with simple rheological equations describing soil behaviour and are discretized using the SPH method. The accuracy of the model is assessed using a series of benchmarks, and then it is applied to back‐analyse the propagation stage of some catastrophic flow‐like slope movements for which field data are available. Copyright © 2008 John Wiley & Sons, Ltd.