Abstract: This paper presents the principles of the analysis on the seismic performance of the earth and rock filled dams in Poindo, Tibet. The seismic response spectrum, seismic capacity of the dam structures and the required energy in earth and rock filled dam at failure are also summarized in the paper. The concepts of energy criteria for the seismic stability and the risk potential for the seismic failure for the Piondo earth and rock filled dams are also proposed and these concepts are used in the seismic analyses of the two dimensional structures such as dams in order to evaluate factors such as, the acceleration in dam, maximum seismic shear strain, maximum principal stress and maximum seismic deflection, on the dam safety. The results are proved to be reasonable.

Key words: Seismic Performance, Response Spectrum, Time Domain Analysis