【摘要】 针对淤沙对混凝土坝地震响应的影响问题,基于液固两相介质的Biot固结理论,推导了饱和多孔液固两相介质的压力波动方程,并以某混凝土坝为例,分析了不同淤沙孔隙率、渗透系数及淤沙层厚度对混凝土坝面地震响应的影响。实例应用结果表明,淤沙能降低坝面动水压力、减小混凝土坝对地震的响应,且一定的淤沙对坝体抗震有益。更多还原

【Abstract】 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.更多还原