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K max is the maximum acceleration of the sliding mass from the crest to the depth
y . K max is determined from the abacus in Figure 10.6 depending on the natural period
and the maximum acceleration at the crest u max .
Figure 10.7. k max /u max versus y/h (Ambraseys and Sarma)
T 0 is the first natural period of the dam:
T 0 = 2.61.h/Vs
u max is the maximum acceleration at the crest obtained from the spectral analysis,
equal to 1.6 times the spectral acceleration for the natural period of the dam Sa(T 0 ) :
u max = 1.6 Sa( T 0 );
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