The Study of the Numerical Calculation of the Nonlinear Seismic Response of the Rock-fill Dam of the High Panel

In the southwest areas of China, multiple seats of the CFRD (Concrete Faced Rock-fill Dam) are under construction or are being planned, and these areas are in the earthquake zone of the high intensity. Through the numerical calculation of the nonlinear finite elements, the author of this paper conducted the comparatively systematical analysis and research on the seismic response and the seismic performances of the CFRD. Based on the equivalent linearization method, the 2D and the 3D analyzing programs of the QUAD4 and THREE8 of the seismic response of the existing CFRD are improved. In the analysis, the special characteristics of the structures and the characteristics of the composition of the materials of the CFRD are mainly reflected. On the one hand, use the Goodman element simulation rock-fill without the thick contacting surface and the interface characteristics between the panels, and at the same time, use the panel units and the joint unit simulation panel and the panel toe plate. On the other hand, according to the empirical formula Professor Xu Hanzhong at Hohai University proposed to modify the Westergaard hydrodynamic pressure, reasonably consider the effect of the hydrodynamic pressure in the two-dimensional and the three-dimensional dynamic calculation. The numerical results and conclusions have the guiding significance for the evaluation of the seismic performance of the CFRD, and also have the important reference values for the seismic design of the Hongjiadu Concrete Faced Rock-fill Dam.