College of Civil Engineering, Liaoning Technical University, Fuxin, China.
College of Architecture and Transportation, Liaoning Technical University, Fuxin, China.
PLoS One. 2022 Oct 26;17(10):e0276543. doi: 10.1371/journal.pone.0276543. eCollection 2022.
Considering the strain-softening characteristics of the pull-out interface between geotextiles and tailings; to determine the interface interaction characteristics, this paper proposes a trilinear shear stress displacement softening model of geotextile-reinforced tailings. The obtained nonlinear governing equations were dimensionless, which were expressed in finite difference form. The results indicated that an accurate numerical solution could be obtained within a reasonable calculation time by discretizing the reinforcement length into 300 units. Three new dimensionless interaction terms, namely, the relative stiffness α, relative displacement β, and relative interface shear stiffness η of the reinforcement-tailings interaction, were introduced. In addition, an estimation method based on the approximate value of the relative stiffness α of the reinforcement-soil interface in the low-tensile-force displacement range was proposed. The interface shear stress range according to parameters α, β, and η was parameterized, and the normalization relationship between the tensile force and pull-out end displacement was determined. The numerical values calculated by the model were compared with the pull-out test results, demonstrating that the proposed model can accurately predict the pull-out behavior of the extensible reinforcement.
考虑到土工织物与尾矿之间拔出界面的软化特性；为了确定界面的相互作用特性，本文提出了一种土工织物增强尾矿的三线性剪切应力-位移软化模型。得到的非线性控制方程是无量纲的，并用有限差分形式表示。结果表明，通过将加固长度离散成 300 个单元，可以在合理的计算时间内获得准确的数值解。引入了三个新的无量纲相互作用项，即加固-尾矿相互作用的相对刚度α、相对位移β和相对界面剪切刚度η。此外，提出了一种基于加固-土壤界面在低拉伸力位移范围内相对刚度α的近似值的估计方法。根据参数α、β和η的界面剪切应力范围进行了参数化，并确定了拉力与拔出端位移之间的归一化关系。模型计算的数值与拔出试验结果进行了比较，表明所提出的模型可以准确预测可拉伸加固的拔出行为。
