红黏土的动模量与阻尼比的试验研究

红黏土特殊的结构性使其具有高含水量、高孔隙比、高液塑限但力学性质较好的特性。为了研究红黏土的动力学特性，本文通过对取自桂林地区红黏土进行动力学试验，得到桂林红黏土的动应力-动应变关系曲线，该曲线适用于HARDIN的双曲线模型。得到的结论如下：（1）结合不同的试验影响因素的条件，得出桂林红黏土的双曲线模型参数。并得出其特有的应变软化特性。（2）桂林红黏土在不同的试验条件因素下得到的最大动剪切模量，结合围压、固结应力比、结构性等因素，得到了桂林红黏土在不同的影响因素影响下的阻尼比的拟合参数。经试验，该拟合参数能够很好地反映红黏土特性，可以应用于工程实际中。

THE LABORATORY STUDY ON THE DYNAMIC MODULUS AND DAMPING RATIO OF LATERITIC CLAY

The special structure of lateritic clay has the characteristics of high water content, high porosity ratio, high liquid plastic limit but good mechanical properties. In this paper, the dynamic stress-dynamic strain relation curve of Guilin lateritic clay is obtained by kinetic test from Guilin lateritic clay, which is suitable for Hardin hyperbolic model. The conclusions are as follows:(1) The hyperbolic model parameters of Guilin lateritic clay are obtained by combining the conditions of different test factors. and obtain its peculiar strain softening characteristic. (2) The maximum dynamic shear modulus of Guilin lateritic clay in different test conditions is connected with the factors of confining pressure, consolidation stress ratio and structure, and the fitting parameters of the damping ratio of Guilin lateritic clay under different influence factors are obtained. By experiment, the fitting parameters can reflect the characteristics of lateritic clay well and be applied in engineering practice.