Numerical Modeling of Nonlinear Response of Seafloor Porous Saturated Soil Deposits to SH-Wave Propagation

Numerical modeling of seismic response soil deposits is usually conducted as part hazard assessment, preceding facility construction in any tectonically active regions, including offshore sites. A significant feature subsea soils their porous and water-saturated structure. Thus, the purpose present study to introduce a procedure for nonlinear behavior porous, moist during SH-wave propagation, verify it compare synthetic profiles with medium parameters specific low moisture onshore high sites cohesive non-cohesive soils. The well-known approved NERA code was used basis improved incorporate Biot Gassman equations elastic waves propagation fluid-saturated solid. applicability presented approach substantiated integration into other algorithms. Obtained results showed good agreement between simulated by different methods observed spectra. also that both explained effects resonances effect amplitude saturation, which, turn, depend on corresponding value layer thickness S-wave impedance saturated layer. proposed scheme could have practical usage studying deposits.