进行了某混凝土重力坝在多遇和罕遇地震荷载作用下的二维地震响应分析,比较了水位条件对大坝动力响应的影响。研究表明,在多遇地震荷载作用下,大坝应力应变关系基本处于弹性状态,在罕遇地震荷载作用下,最大地震动位移出现在大坝上侧,随着水位的上升,大坝上侧的位移和坝踵处动应力逐渐减小,而下游坝面折坡处的动应力基本不变。 The 2D seismic response analysis of a concrete gravity dam under frequent and rare earthquakes was carried out and the effect of water level on the dam dynamic response was compared. The results show that under the action of frequent earthquake loads, the stress-strain relationship of the dam is basically in a state of elasticity. Under the rare earthquake load, the maximum ground motion displacement appears on the upper side of the dam. As the water level rises, the upper side of the dam The displacement and dynamic stress at the dam heel gradually decrease, while the dynamic stress at the downstream dam surface is basically unchanged.