Effects of confining‐pressure dependent Lame moduli on the frequency‐dependent amplification of a poro‐viscoelastic soil layer under horizontal cyclic loading

In this paper, a series of Biot theory-based analytical solutions are proposed to study the dynamic response viscoelastic two-phase porous medium subjected horizontal cyclic loading. To investigate effect material properties' depth (or confining-pressure) dependency, two types soil stiffness profiles adopted, along with constant Lame elastic and loss moduli depth: that linearly increasing nonlinearly depth. The influence loading frequency, retardation time viscous damping), newly introduced model parameter expresses cohesion on numerically examined. When is small periodic, it demonstrated ground surface displacement versus frequency greatly affected by moduli's depth-dependency; peak-to-peak period becomes shorter amplitude decay tends be minimal, considering depth-dependency, particularly in condition addition, cohesion-related affects not only periodic but also phase characteristics. Furthermore, depth-dependency investigated amplification factor distribution under