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.