複合体理論を適用しモデル化した沖積層地盤の動力学特性に関する研究 : (その2)上下加振ground complianceに与える間隙水の動的連成効果

抄録

This paper describes a theoretical study concerning soil-structure dynamic interaction problems on an alluvial medium. The dynamical characteristics of a poroelastic half space are investigated using an analytical model based on theory of aggregate body. There are some permeability ranges which are unable to be qualitatively explained explained by behaviors of both perfectly elastic body and Voigt-type viscoelastic one simulated by using the characteristics of the body waves traveling in the aggregate body. The value of imaginary part of Dynamical Ground Compliance corresponding to radiation energy through a sub-soil ground, is large in high permeability range, on the other hand, it becomes small in low permeability range, because the relative particle velocities between the porous elastic body and the pore water decreases in this range.