Vertical ground motion analysis for submerged pore-elastic media with random void ratios

摘要: Abstract Recently, very strong vertical ground motions have been recorded during several earthquakes. The are the consequence of compressional stresses which mainly transmitted by pore fluids. For linear elastic analysis a submerged soil layer, permeability has minor effect on shear-wave response for fluids not taken into account. But compressional-wave response, dominates damping and is thought as principal influential factor from In this study, changing explored. practice it harder to obtain coefficient permeability, κ, than measure void ratio, e. order evaluate explore its influence shaking, formula relating κ–e saturated selected 1D pore-elastic model subjected sine-wave loading. random, linear, linear-plus-random, logarithmic, log-plus-random depth functions ratio account in study. intrinsic error due use arithmetic mean certain area with heterogeneous distribution also assessed. Numerical simulations show that five distributions all result extra viscous forces. shaking controlled harmonic spatial rather permeability. more appropriate be representative because inversely proportional