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The horizontal component of an earthquake wave...

The horizontal component of an earthquake wave producing instability in a dam is the one which acts __________________

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asked Sep 5, 2023 in Irrigation Engineering by Carter (75.2k points)

The horizontal component of an earthquake wave producing instability in a dam is the one which acts __________________

(a) towards the reservoir

(b) towards the dam

(c) away from the reservoir

(d) away from the dam

I had been asked this question during an internship interview.

This question is from Gravity Dam Design topic in division Gravity Dam Design and Construction of Irrigation Engineering

irrigation engineering
gravity dam design and construction
gravity dam design

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1 Answer

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answered Sep 16, 2023 by Greg (106k points)

Correct answer is (a) towards the reservoir

The explanation: Hydrodynamic pressure and horizontal inertia force are caused by the horizontal acceleration of an earthquake wave acting towards the reservoir. As the foundation and dam accelerate towards the reservoir there is an increase in the water pressure which is resisted by water, the extra pressure is hydrodynamic pressure.

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