Earthquake Effects on Rectangular Dam-Reservoir Systems

摘要

This study deals with the earthquake effect on a three-dimensional, rectangular dam-reservoir system with vertical boundary. Both the longitudinal and the lateral harmonic ground excitations have been investigated. The compressibility of water, the seismic wave attenuation and the phase difference between two ends of a reservoir are considered. Analytic solutions are obtained for the hydrodynamic pressures, forces, and moments by using the method of orthogonal expansions. The possibility of resonance is discussed. Resonances tend to occur for a deep dam excited by a ground motion of small seismic period. The effects of the seismic wave attenuation, the phase difference, and the length of a reservoir are found to be small.