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Dynamic behavior of fiber-reinforced soil under freeze-thaw cycles

机译：冻融循环下纤维增强土壤的动力特性

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摘要

This research presents the dynamic behavior of fiber-reinforced soil exposed to freeze-thaw cycles. The series of dynamic triaxial tests were conducted on fine-grained soil mixed with different percentages of basalt and glass fibers subjected to freeze-thaw cycles. The results showed that after freeze-thaw cycles, with the addition of basalt and glass fibers, the damping ratio and the shear modulus increased at a constant confining pressure because of the increase of stiffness, but the shear modulus decreased with increasing shear strain. Moreover, the theoretical analytical formulations were developed to define for dynamic shear stress and dynamic shear modulus. The parameters were predicted by Hardin-Drnevich model and Kondner-Zelasko model. The shear modulus was expressed as a function of freeze-thaw cycles, fiber contents, confining pressure and initial water content. Finally, ten coefficients were calibrated by analyzing the experimental results and then employed to describe dynamic shear modulus of the fiber-reinforced soil.
机译：这项研究提出了暴露于冻融循环的纤维增强土壤的动力学行为。在混合有不同百分比的玄武岩和玻璃纤维的细粒土壤中进行了一系列动态三轴试验，并进行了冻融循环。结果表明，冻融循环后，随着玄武岩和玻璃纤维的加入，由于刚度的增加，阻尼比和剪切模量在一定的围压下增加，但剪切模量随剪切应变的增加而减小。此外，开发了理论分析公式来定义动态剪切应力和动态剪切模量。参数由Hardin-Drnevich模型和Kondner-Zelasko模型预测。剪切模量表示为冻融循环，纤维含量，围压和初始水含量的函数。最后，通过分析实验结果校准了十个系数，然后用它们来描述纤维增强土的动态剪切模量。

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