粘土の動的弾性係数に関する理論的考察

Abstract

In this paper, the dynamic viscoelastic properties of clay under the load of low fre-quency are theoretically investigated. The authors analysed the effect of frequency andtemperature on elasticity of clay by introducing a relaxation spectrum. This spectrumwas adopted as a box type distribution by refering to the results of stress relaxation testson clay samples.Principal results obtained from their analysis are as follows;(1) The dynamic elastic modulus of clay increases linearly with increase of logarithmof angular velocity.(2) Elasticity of clay decreases in hyperbolic relation with increase of temperaturenot only because of time scale effect but the change of inherent nature of clay structure.Moreover, the dependence of elasticity of clay on the applied stress amplitude is discussedconsidering a change in clay structure.