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首页> 外文会议>International Conference on Unsaturated Soils; 20060402-06; Carefree,AZ(US) >The Effects of Relative Velocities and Accelerations of the Pore Fluids on the Dynamic Behavior of Unsaturated Soils
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The Effects of Relative Velocities and Accelerations of the Pore Fluids on the Dynamic Behavior of Unsaturated Soils

机译：孔隙流体的相对速度和加速度对非饱和土壤动力特性的影响

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摘要

Unsaturated soils are three-phase porous media consisting of a solid skeleton, pore liquid, and pore gas. The overall behavior of Unsaturated soils is influenced not only by these three bulk phases, but also by the interfaces between them. The coupled mathematical equations governing the dynamics of Unsaturated soils can be derived based on the theory of mixtures with interfaces (TMI). Solution of these equations requires large computational resources. A framework-based parallel finite element code was developed for efficiently solving such large problems. Simulation of an unsaturated soil embankment subjected to earthquake loading is presented to show the capabilities of the computer code developed. A reduced set of governing equations, neglecting the relative accelerations and velocities of fluids, is also solved to study the effects of these quantities on the overall dynamic behavior of unsaturated soils. The reduced set of equations gives comparable results to that of the complete set of equations for a low permeable soil considered in this study.
机译：不饱和土壤是由固体骨架，孔隙液体和孔隙气体组成的三相多孔介质。不饱和土壤的整体行为不仅受这三个本体相的影响，而且还受它们之间的界面的影响。可以基于带界面混合理论（TMI）导出控制非饱和土动力学的耦合数学方程。这些方程式的求解需要大量的计算资源。开发了基于框架的并行有限元代码以有效解决此类大问题。提出了模拟非饱和土路堤承受地震荷载的方法，以显示所开发计算机代码的功能。还解决了简化的控制方程组，忽略了流体的相对加速度和速度，以研究这些量对非饱和土壤整体动力特性的影响。简化的方程组与本研究中考虑的低渗透性土壤的完整方程组具有可比的结果。

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