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首页> 外文期刊>Geotextiles and Geomembranes >A three-dimensional finite element approach for modeling biaxial geogrid with application to geogrid-reinforced soils
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A three-dimensional finite element approach for modeling biaxial geogrid with application to geogrid-reinforced soils

机译：双轴土工格栅建模的三维有限元方法在土工格栅加筋土中的应用

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摘要

Understanding soil-geogrid interaction is essential for the analysis and design of geogrid-reinforced soil structures. A first step towards accurate modeling of this interaction is choosing a suitable material model for the geogrid that is capable of simulating tensile test results. The model must be able to capture the three-dimensional response of the geogrid considering its exact geometry. Modeling geogrid inclusion as a continuous sheet has proven to reasonably simulate the overall response of soil-geogrid systems; however, it does not explain the different sources of interaction between the geogrid layer and the surrounding soil. To understand the three-dimensional aspects of this complex interaction problem, a two-phase numerical investigation is developed in this study. The first phase focuses on the three-dimensional modeling of unconfined biaxial geogrid subjected to tensile loading. Applicability of the geogrid model in solving soil-structure interaction problems is then demonstrated, in the second phase, by investigating the response of a reinforced subgrade subjected to a square shaped surface loading. It is concluded that modeling the three-dimensional geogrid geometry is important to accurately capture the true response of geogrid under both confined and unconfined conditions. The modeling approach proposed in this study for the analysis of unconfined and soil-confined geogrid can be adapted for other reinforced soil applications. (C) 2016 Elsevier Ltd. All rights reserved.
机译：了解土壤-土工格栅相互作用对于土工格栅加筋的土壤结构的分析和设计至关重要。对此相互作用进行精确建模的第一步是为土工格栅选择合适的材料模型，该模型能够模拟拉伸测试结果。考虑到模型的确切几何形状，该模型必须能够捕获土工格栅的三维响应。实践证明，将土工格栅夹杂物建模为连续的薄片可以合理地模拟土工格栅系统的整体响应；然而，它并没有解释土工格栅层与周围土壤之间相互作用的不同来源。为了理解这个复杂的相互作用问题的三维方面，本研究进行了两阶段数值研究。第一阶段着重于承受拉伸载荷的无限制双轴土工格栅的三维建模。然后，在第二阶段中，通过研究方形表面荷载作用下的加筋路基的响应，证明了土工格栅模型在解决土壤与结构相互作用问题中的适用性。结论是，对三维土工格栅几何结构建模对于在受限和非受限条件下准确捕获土工格栅的真实响应非常重要。本研究中提出的用于分析无约束土和土约束土工格栅的建模方法可适用于其他加筋土应用。 （C）2016 Elsevier Ltd.保留所有权利。

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