混凝土重力坝的地震响应分析

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。

Seismic response analysis of a concrete gravity dam

Two-dimensional seismic responses of a concrete gravity dam under action of frequent and rare earthquakes were analyzed and influences of water level conditions on dynamic response of the dam were compared.The results show that under the frequent earthquake load the stress-strain relationship is basically in elastic deformation phase,while under the rare earthquake load,maximum seismic displacement occurs at the top of the dam,and with the increase of water level,displacement at top of the dam and dynamic stress at the dam heel decrease,and stress at the off slope of the dam changes slightly.