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Why bridges are declared unsafe after long use? Mechanics .

Why bridges are declared unsafe after long use? Mechanics .
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Grade:11

1 Answers

Arun
25750 Points
5 years ago
If the bridge is used for a long time, due to alternate cycles of stress and strain the bridge gradually loses its elastic property and finally reaches to a condition called elastic fatigue. Hence, at this stage, the strain produced for a given stress will be very large and ultimately the bridge may collapse. Hence, bridges are declared unsafe after a long use.

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