A gravity dam is called:
A. A low dam if the maximum allowable stress at the base controls the base width.
B. A low dam if the base width controls from the consideration of the resultant falling as close as possible to the extremities of the middle third of the base.
C. A high dam if the base width controls from the consideration of no tension anywhere in the beam.
D. A high dam if its height is greater than 100 meters.
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Right Answer is: B
SOLUTION
A gravity dam is defined as a structure which is defined in such a way that its own weight resists the external forces.
Maximum possible height (limiting height) of the dam is given by:
\({H_{max}} = \frac{f}{{{\gamma _w}\left( {{S_c} + 1} \right)}}\)
A low gravity dam is the one whose height is less than Hmax.
A high gravity dam is the one whose height is greater than Hmax.
A gravity dam is called as low dam if the base width is designed from the consideration of the resultant falling as close as possible to the extremities of the middle third of the base.