A 2D Smoothed Particle Hydrodynamics method for liquefaction induced lateral spreading analysis
A 2D Smoothed Particle Hydrodynamics method for liquefaction induced lateral spreading analysis
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DOI：
10.2208/journalam.8.591
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发表时间：
2005-08
期刊：
影响因子：
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通讯作者：
M. Naili;T. Matsushima;Yasuo Yamada
中科院分区：
文献类型：
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作者：
M. Naili;T. Matsushima;Yasuo Yamada
本文在流体动力学框架中使用基于二维平滑粒子流体动力学（SPH）的数值方法研究了液化引起的横向扩散。由于横向扩展时引起的位移可能达到数米，并且剪应变发展到100%，因此开发了一种本质上是朗格朗日无网格粒子的方法来处理大位移。通过假设液化底土在地震振动过程中表现为粘性流体，使用宾汉姆型模型对液化土进行建模。使用振动台实验的结果来检查该方法的能力，以再现自由表面形状、流速并研究流速的时间历史、液化土厚度和表面地面坡度之间的关系。
This paper investigates liquefaction induced lateral spreading using a 2D Smoothed particle hydrodynamics (SPH) based numerical method in the framework of fluid dynamics. Owing to the fact that the induced displacement during lateral spread may reach several meters and the shear strain develops till 100%, a method which is essentially a Langrangian meshfree particle was developed to deal with large displacement. By assuming the liquefied subsoil to behave as a viscous fluid during earthquake shaking, a Bingham type model is used to model the liquefied soil. The ability of the method is checked using results from shaking table experiments to reproduce free surface shape, flow velocity and to investigate the relationship between time history of flow velocity, liquefied soil thickness and surface ground slope.