XU Jin-ying, LI De-yu, GUO Sheng-shan

Earthquake Engineering Research Center, IWHR, Beijing 100048, China

Abstract: 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.

Key words: ABAQUS, gravity dam, dynamic analysis, finite element for reservoir, Westergaard, Reduction factor

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 12 No. 1, 2014)