漫湾重力坝抗震试验研究

Experimental Studies on Dynamic Responses of a Model Gravity Dam Subjected to Earthquakes

针对漫湾溢流式厂房重力坝进行了动力模型试验，全面分析了大坝及其厂房的动力特性。由于某些模态之间耦合比较严重，为了得到纯模态，利用频响函数虚部进行识别。在８度地震作用下，漫湾重力坝能满足抗震稳定的要求，除上游坝踵和闸墩下游底部应力较大、应适当提高混凝土标号外，其余部分都符合水工建筑物抗震设计规范要求。

According to the dynamic model test of Manwan gravity dam,the dynamic behavior of dam andpower plant are discussed.In view of the fact that the coupled vibration is rather evident.The modal identifi-cation should be carried out by using frequency response function for obtaining the pure mode shapes.The results of studies indicate:the Manwan gravity dam is safe when subjected to the earthouake of in-tensity 8,however stresses at the dam heel on the upstream face as well as at the level of abrupt change onthe downstream face are higher stress places.The above places should be strengthened.