基于ADINA的重力坝地震响应分析

针对云南某重力坝，利用大型有限元软件ADINA分别基于流固耦合理论和Westergaard附加质量方法建立了数值分析模型，对其自震频率和地震响应进行了分析。结果表明，两种模型的自震频率比较接近，附加质量模型的地震响应要大于流固耦合模型。因此，在重力坝抗震研究中，采用较简单的附加质量模型代替复杂的流固耦合模型考虑水体的影响是偏于安全的，适用于重力坝结构抗震的定性分析。

Application of ADINA to Analysis of Earthquake Response of Gravity Dam

With an aim at a gravity dam in Yunnan,using ADINA,a numerical analysis model is establish on the basis of the dynamic fluid-structure coupling theory and the additional mass method,and also,the self-vibration frequency and the seismic response of the dam structure are analysed.The results indicate that the two models' self-vibration frequency is approximately the same and that the seismic response with additional mass is larger than corresponding result with the fluid-structure coupling.Therefore,in the gravity dam's seismic research,it is comparatively safe to adopt the simple additional mass model instead of the complex fluid-structure coupling model,so that the additional mass model is practical for the qualitative analysis in the seismic research of the gravity dam structure.