Abstract: The plastic damage of concrete gravity dams in strong earthquake is discussed. Taking Koyna gravity dam and a concrete gravity dam in China as the research objects, the generation and development of plastic fatigue damage areas in two gravity dams in strong earthquake are calculated and analyzed respectively by numerical simulation. According to the results of comparative analysis, some suggestions about the key parts of gravity dams need special attention in design stage are put forward, for reference.

Key words: concrete gravity dam, earthquake, plastic damage, earthquake resistant capacity

摘要： 对强震作用下混凝土重力坝塑性损伤问题进行了探讨，以Koyna重力坝和国内某混凝土重力坝坝段为研究对象，通过数值模拟分别计算分析出两个重力坝在强震作用下塑性疲劳损伤区域的产生及发展趋势，根据对比分析结果对重力坝设计阶段中需要重点关注的部位提出了有关建议，供设计部门参考。

关键词: 混凝土重力坝, 地震, 塑性损伤, 抗震能力