Shear Failure Criterion Based on Experimental and Modeling Results for Fiber-Reinforced Clay
Shear Failure Criterion Based on Experimental and Modeling Results for Fiber-Reinforced Clay
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DOI：
10.1061/(asce)gm.1943-5622.0000258
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发表时间：
2013-12
影响因子：
3.7
通讯作者：
M. Jamei;P. Villard;H. Guiras
中科院分区：
文献类型：
--
作者：
M. Jamei;P. Villard;H. Guiras
本文对短纤维增强粘土在平面应变和轴对称情况下的抗剪强度进行了试验研究和建立了分析模型。本研究的主要理论框架是Michalowski模型的扩展，该模型应用于加筋砂土。根据试验结果，土体复合材料的破坏是由纤维滑移引起的。因此，通过拔出试验研究了单纤维与粘土之间的界面行为。综合考虑纤维含量、界面行为和土体破坏准则，建立了粘土/纤维复合材料破坏预测模型。与加筋粘土不排水三轴压缩试验结果的比较表明，轴对称模型最适合于再现加筋材料的破坏准则。
AbstractThe present paper deals with an experimental study and an analytical model set up to predict the shear resistance of clay reinforced by short fibers in plane strain and axisymmetric cases. The primary theoretical framework of this study is an extension of the Michalowski model, which is applied to reinforced sandy soils. According to the experimental findings, the failure of soil composite material is caused by slippage of the fibers. Thus, interface behavior between single fibers and the clay has been investigated by means of pullout tests. Taking into account the fiber content, interface behavior, and soil failure criterion, a model that enables the prediction of the failure of clay/fiber composite has been produced. The comparison with the results of undrained triaxial compression tests performed on reinforced clay has shown that the axisymmetric model is best suited for reproducing the failure criterion of the reinforced material.