Abstract
The author has studied the time domain evaluation of the frequency dependent impedance, and has proposed some transform methods. In this paper, the the time history response analysis method of the dynamic stiffness with both frequency and strain dependency was studied. The frequency dependent complex stiffness was calculated at each strain level first, then they were transformed to the impulse response in the time domain. The characteristics of the complex stiffness and the impulse response of both 2-layered soil and the viscoelastic dampers were investigated as examples. Then the time history response analysis method considering both frequency and strain dependency using the impulse response of each strain level was proposed and the example analysis of 2-layered soil was shown.
