Seismic Response Analysis of Reservoir Water-Gravity Dam-Foundation System

Abstract:

The Scaled boundary finite element method and finite-infinite element method are used to model the system of reservoir water – gravity Dam - infinite foundation. The effect of the reservoir water and the infinite foundation on the seismic response of the dam system is analyzed. In the paper, taking the Koyna gravity dam as the research object, the dynamic water pressure on the upstream face of the dam is calculated by SBFEM. The finite-infinite element method is used to model the infinite foundation. Finally, the time history of seismic displacement and the response of the dam under different elastic modulus are evaluated. By comparing the displacement response of the infinite element model of different elastic modulus, the conclusion is drawn that the response of the dam is increased with the increase of the elastic modulus of the foundation. In addition, the calculated results are compared with those of the model with no-mass foundation. It shows that the results of the model considering the radiation damping of the foundation are less than that of the model with no mass foundation.

• Periodical: Key Engineering Materials (Volume 737)
• Pages: 494-499
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.737.494
• Online since: June 2017
• Authors: Yu Yang Wang*, Jun Yu Liu, Bao Kuan Ning, Ping Zhang
• Keywords: Dynamic Interaction, Finite Element Analysis (FEA), Gravity Dam, Infinite Element, Massless Foundation, Radiation Damping, Reservoir Water Pressure, Scaled Boundary Finite Element Method

References

[1] Y. I. Wang, G. Lin, Z. Q. Hu, Solution of hydrodynamic pressure on gravity dam with considering characteristics of impounded water, J. Shengyang Univ. Technol. 36(1) (2014) 114-120.

[2] G. Lin, Y. Wang, Z. Hu, An efficient approach for frequency-domain and time-domain hydrodynamic analysis of dam–reservoir systems, Earthq. Eng. Struct. Dyn. 41(13) (2012) 1725-1749.

DOI: 10.1002/eqe.2154

[3] G. Lin, J. G. Du, Analysis of dam -reservoir interaction based on SBFEM, J. Dalian Univ. Technol. 45(5) (2005) 723-729.

[4] Y. Wang, Z. Q. Hu, Dynamic water pressure calculation of arch dam based on finite element method, Water Resour. Power, 29(2) (2011) 44-46.

[5] D. H. Chen, C. B. Du, Time domain model of structure -foundation dynamic interaction, Rock Soil Mech. 35(4) (2014) 1164-1172.

[6] C. M. Song, The scaled boundary finite element method in structural dynamics, Int. J. Numer. Methods Eng. 77(8) (2009) 1139-1171.

DOI: 10.1002/nme.2454

[7] G. Lin, Y. Wang, Z. Hu, An efficient approach for frequency-domain and time-domain hydrodynamic analysis of dam – reservoir systems, Earthq. Eng. Struct. Dyn. 41(13) (2012) 1725-1749.

DOI: 10.1002/eqe.2154