Multiscale insights into classical geomechanics problems
Multiscale insights into classical geomechanics problems
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DOI：
10.1002/nag.2406
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发表时间：
2016-02
影响因子：
4
通讯作者：
N. Guo;Jidong Zhao
中科院分区：
文献类型：
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作者：
N. Guo;Jidong Zhao
我们用一种新的计算多尺度建模方法来重新审视一些经典的地质力学问题。多尺度方法采用有限元法和离散元法的分层耦合。采用有限元法求解连续尺度下的边值问题，并通过有限元网格各高斯点的离散元法模拟得到质点响应。多尺度建模框架不仅有助于成功绕过传统建模方法中所要求的现象学本构假设，而且有助于有效地跨尺度解释和理解土壤行为。用该方法对经典挡土墙和基础问题进行了分析，结果表明其解析解可以很好地验证和验证模拟结果。此外，该研究为这些经典问题提供了新的多尺度见解，并为岩土工程师提供了直接基于土壤颗粒级信息设计和分析岩土工程应用的新工具。版权所有©2015 John Wiley & Sons， Ltd
We pay a revisit to some classical geomechanics problems using a novel computational multiscale modelling approach. The multiscale approach employs a hierarchical coupling of the finite element method (FEM) and the discrete element method. It solves a boundary value problem at the continuum scale by FEM and derives the material point response from the discrete element method simulation attached to each Gauss point of the FEM mesh. The multiscale modelling framework not only helps successfully bypass phenomenological constitutive assumptions as required in conventional modelling approaches but also facilitates effective cross‐scale interpretation and understanding of soil behaviour. We examine the classical retaining wall and footing problems by this method and demonstrate that the simulating results can be well validated and verified by their analytical solutions. Furthermore, the study sheds novel multiscale insights into these classical problems and offers a new tool for geotechnical engineers to design and analyse geotechnical applications based directly upon particle‐level information of soils. Copyright © 2015 John Wiley & Sons, Ltd.