层状淤沙对混凝土重力坝地震响应的影响分析

本文研究了不同厚度淤沙对混凝土重力坝地震响应的影响以及一定厚度层状淤沙的不同分布形式对混凝土重力坝的地震响应的影响。基于饱和多孔液固两相介质的压力波动方程,设层状淤沙各层厚度不同,将层状淤沙分为三种不同分布形式,在每种分布形式每层的物理参数相同和物理参数不同两种情况下,确定了淤沙对混凝土重力坝地震响应的影响大小。通过算例分析表明,相同物理性质不同的分布形式对地震响应的影响不显著,而不同的分布形式对坝体的地震响应影响较大。

Analysis on impact from layered sediment on seismic response of concrete gravity dam

The impacts from various thicknesses of sediments and the differently distributed layered sediments with certain thicknesses on the seismic response of concrete gravity dam are studied herein. Based on the equation of pressure fluctuation for saturated porous fluid-solid medium，the thicknesses of all the layers of the layered sediments are set，while the layered sediments are divided into three different distribution forms. Under the conditions of both the same physical parameter distribution and the different physical parameter distribution for each distribution form for each layer，the magnitude of the impact from the sediment on the seismic response is determined. Through the analysis made on a typical calculation case，it is indicated that no any significant impacts from the same physical properties with different distributions are there on the seismic responses. Nevertheless，the impacts from different distribution forms have larger impacts on the seismic responses of the dam body.