Question

For full reservoir condition in a gravity dam, the critical combination

of vertical and horizontal earthquake accelerations to be considered

for checking the stability is
​

Answer 1

Explanation:

Vertically downward and horizontally downstream.

Due to the gravitational weight of the dam reservoir, and the vertical acceleration, it is vital to consider the vertically downward stream. Also when the dam is full, and it is pressurized by water, then if the direction of hydrostatic pressure is along the horizontal acceleration, then it will also produce drastical damage, so it is important to consider the horizontal downstream forces also