T n m m

The term, (2m4-hi)c is the mthperiod of the reservoir, Tm,. Therefore, the westergaard's solution is valid if the period of loading, T, is greater than the

0.38h

0.875h

Figure 2.19: Added mass approach first period of the reservoir, T\ = —,. If T = Tm, then p = to and we have resonance.

The Westergaard pressure equation at the upstream face of the dam can be written as followings:

4apg n cos ut

0 0

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