基于ABAQUS的两种库水附加质量模型下重力坝动力分析  

The dynamic analysis of gravity dam under two added water mass models based on ABAQUS

作　　者：徐金英[1] 李德玉[1] 郭胜山[1] 

机构地区：[1]中国水利水电科学研究院工程抗震研究中心,北京100048

出　　处：《中国水利水电科学研究院学报》2014年第1期98-103,共6页Journal of China Institute of Water Resources and Hydropower Research

摘　　要：库水附加质量反映了坝体与库水间的相互作用。本文以Koyna重力坝为例,基于ABAQUS并辅以部分MATLAB程序计算了两种不可压缩性库水附加质量模型下坝体的自振特性。分析Koyna各计算条件下的自振频率,结果表明:与库水有限元模型相比,Westergaard模型夸大了坝体与库水间的相互作用,应当进行折减,折减系数取0.8较为适宜。考虑折减的Westergaard模型下坝体地震响应计算结果与实际震害更符合,从而验证了折减系数的准确性。Added water mass reflects the interaction between dam and water. Taking the gravity dam Koyna as an example in this paper, the natural vibration characteristics of the dam are calculated by using ABAQUS and MATLAB, under two different added water mass models which assume that the water is incompressible. The result shows that the vibration frequency from the Westergaard model exaggerates the interaction between the dam and water compared with that of the finite element model and should be reduced with a reasonable reduction factor of 0.8. The result of Westergaard model by considering the reduction factor is consistent with the real damage of earthquake, thus verifying the accuracy of reduction factor values.

关 键 词：ABAQUS 重力坝 动力分析 库水有限元 Westergaard 折减系数 

分 类 号：TV642[水利工程—水利水电工程]