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本文在平面应变问题范围内,讨论粘弹性均匀半平面地基对重力坝地震反应(主要指地震荷载)的影响,定义了相互作用影响系数。数值分析结果表明,在坝基动力相互作用问题中,坝与地基的弹模之比和重力坝的第一自振频率与地震波主频率之比是两个重要影响因素。
In this paper, the influence of viscoelastic uniform half-plane foundation on the seismic response of gravity dam (mainly earthquake load) is discussed in the plane strain problem, and the interaction influence coefficient is defined. The results of numerical analysis show that the ratio of the dam-to-ground elastic modulus and the ratio of the first natural frequency of the dam to the main frequency of the seismic waves are two important influencing factors in the dynamic interaction of the dam foundation.