Analysis of Porous Medium Sediments on Seismic Response of Concrete Dam

To solve the problem of sediments on seismic response of concrete dam,pressure wave formula of saturated porous fluid-solid two-phase medium is derived from the Biot's consolidation theory.Taking a concrete dam for an example,it analyzes the influence of sediment porosity,permeability coefficient and sediment thickness on the seismic response of concrete dam.The result shows that the sediments can decrease hydrodynamic pressure of the dam surface and reduce seismic response of concrete dam.Thus,the sediment is useful to resist earthquake for concrete dam.