粘性土の減衰特性, とくに減衰定数について

Abstract

In this paper the authors are mainly concerned with the damping characteristics of cohesivesoils from a viewpoint of dynamic rheology. The characteristics of wave attenuation are observedin the rod wave propagation test by the shock tube technique. And the stress or strain level belowwhich the characteristics of wave attenuation can be regarded to be viscoelastic is confirmed by thepeak stress attenuation with propagating distance. By using the experimental results for dampingfactor obtained from the free vibration test and the forced vibration test as well as the wave pro-pagation test which have been performed below the stress or strain level as described above, thefrequency dependency of the damping factor is considered in the wide frequency range.