The vertical downward earthquake acceleration av= 0.1g acting on a gravity dam will do what ?
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When the vertical acceleration is acting downward the foundation try to move downward away from the dam body. This reduces the effective weight and the stability of the dam.
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The vertical downward earthquake acceleration that is on an average of av= 0.1g acting on a gravity dam will eventually increase its resisting weight of dam approx by 10 percent.
the explanation of this is given that when the vertical acceleration acts on any body inversely or down ward the action force try to move it back to away from the dam body and so therefore it reduces the effective weight and the stability of it. the failure can be happen when there is a tension crack on it. the failure of gravity can cause a major disturbance.
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