关于高土坝地震反应分析中阻尼模型的讨论

Discussion on damping models for seismic response analysis of high earth dams

主要讨论了不同阻尼模型对高土坝地震反应计算误差的影响。首先,通过理论分析,说明了土石坝地震反应分析采用常用阻尼模型的局限性。然后,运用有限元方法,分别用基于转换频率和土坝基频的两种阻尼模型对高土坝进行时域内的线性地震反应计算。最后,和频域内计算结果进行对比,分析了不同阻尼模型对计算结果精度的影响。

This paper discusses the effect of different damping models on the seismic response analysis accuracy of high earth dams. First a theoretical analysis is used to show the limitation of traditional damping model. Then seismic response computations are presented for six earth dams of different height with two damping models, the translation frequency model and the dam＇ s fundamental frequency model. Finally a comparison of the results by the time-domain method and by the frequency-domain method is given to show the difference of damping models.