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Date of Publication:2013-01-01

Journal:大连理工大学学报

Issue:5

Page Number:715-722

ISSN No.:1000-8608

Abstract:Earthquake analyses of gravity dams with five different heights in time domains are performed on the fluid-structure coupling model and the added mass model respectively. The hydrodynamic pressures obtained from the two models are compared with Westergaard solutions, and the comparative results show that the accurate results of hydrodynamic pressure can be obtained by Westergaard formula for middle and low dams with the height of about 70 m, but reasonable results of the dynamic responses of dam-reservoir system should be obtained by the fluid-structure coupling model for high dams with the height of above 160 m. Based on the comparison between the results from fluid-structure coupling model and the added mass model for dynamic responses of dam-reservoir system, it is found that the results of the added mass model are larger than those of fluid-structure coupling model in the views of fundamental frequencies, displacements and peak ground acceleration (PGA) of dams. As for the dams with a height of about 200 m, the influence of foundation on dam-reservoir interaction is significant and must be considered. As for the dams with a height of about 70 m, the influence of foundation can be neglected.

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