Journal of Engineering Mechanics · 1986 · 52 citations · 5 references
EngineeringEarth SciencesGeophysicsEarthquake EngineeringReservoir EngineeringSeismologyEngineering SeismologyGeotechnical Earthquake EngineeringHydrodynamic ResponsePoromechanics Of RocksRock PhysicsSediment PropertiesAnalytical SolutionsDampingDamping CoefficientsDesaturationEarthquake SeismologyHydrodynamic Response AnalysisPoroelastic BehaviorSeismic Response Modeling
Typical reservoirs may have a substantial sediment layer on top of bedrock, yet the influence of such sediment on the dissipation and damping of earthquake‑induced hydrodynamic waves has largely been ignored in prior studies of dam‑reservoir‑foundation systems. The study models the sediment layer as a poroelastic material to assess its effect on earthquake‑induced hydrodynamic response. Analytical solutions for vertical excitations were derived using computer algebra (MACSYMA). Bottom damping coefficients were explicitly expressed as functions of material properties and earthquake frequency, revealing that modest sediment layers and slight pore‑water desaturation can significantly alter hydrodynamic response curves.
In typical reservoir a sediment layer of considerable depth may be deposited on top of exposed bedrock foundation. The effect of sediment on the dissipation and damping of earthquake induced hydrodynamic waves is by and large ignored in earlier studies of dam‐reservoir‐foundation system. The present work models the sediment as a poroelastic material. For vertical excitations, analytical solutions are sought with the aid of computer algebra (MACSYMA). As a result, the bottom damping coefficients are explicitly expressed as functions of material properties and earthquake frequency. For a modest amount of sediment and slight desaturation of pore water, significant changes in the hydrodynamic response curves are observed.
5