EP 1110-2-12
30 Sep 95
may be ignored in the preliminary design of new
f. Conclusions. Under certain critical seismic
dams not subject to critical seismic conditions. The
conditions, the response to the vertical component of
vertical component of ground motion shall be
ground motion may be significant when compared to
included for preliminary designs subject to critical
the response to the horizontal component; however
seismic conditions, all final designs, and evaluation of
the phase relationship will greatly moderate the verti-
existing dams.
cal component contribution to the total response. On
this basis, the vertical component of ground motion
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