Dominant grains network and behavior of sand–silt mixtures: stress–strain modeling
Dominant grains network and behavior of sand–silt mixtures: stress–strain modeling
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DOI：
10.1002/nag.2152
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发表时间：
2013-10
影响因子：
4
通讯作者：
Ching S. Chang;M. Meidani
中科院分区：
文献类型：
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作者：
Ching S. Chang;M. Meidani
砂-粉土混合物的应力-应变模型在土结构分析和设计中具有重要意义。在本文中，我们开发了一个应力应变模型，可以预测的行为，砂粉土混合物与任何数量的细粒含量。该模型基于微观力学方法，其中涉及平均场假设。对于细粒含量较低的混合料，其力学行为主要由砂粒网络控制。细粉掺量高的混合料，其力学行为以粉粒网络为主。利用这种优势颗粒网络的概念，可以从单独了解砂和粉土的行为来预测具有任何数量的细粒的混合物的行为。我们还模拟了临界状态摩擦角，临界状态空隙比，和弹性刚度的混合物作为一个功能的罚款含量。通过比较两种不同类型的砂粉土混合物的模拟和实测结果，证明了该应力应变模型的适用性。版权所有© 2012约翰威利父子有限公司.
Stress–strain modeling of sand–silt mixtures is important in the analysis and design of earth structures. In this paper, we develop a stress–strain model that can predict the behavior of sand–silt mixtures with any amount of fines content. This model is based on a micromechanics approach, which involves mean‐field assumptions. For the mixtures with low amount of fines, the mechanical behavior is dominated by sand grains network. On the other hand, for the mixtures with high amount of fines, the mechanical behavior is dominated by silt grains network. Using this concept of dominant grains network, the behavior of mixtures with any amount of fines can be predicted from knowing the behavior of sand and silt, alone. We also modeled the critical state friction angle, critical state void ratio, and elastic stiffness for the mixtures as a function of fines content. The applicability of this developed stress–strain model is shown by comparing the simulated and measured results for two different types of sand–silt mixtures with full range of fines content. Copyright © 2012 John Wiley & Sons, Ltd.