WHY ARE THE BRIDGE DECLARED UNSAFE AFTER A LONG USE?
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Expert's answer
2014-11-13T03:10:59-0500
If the bridge is used for a long time, dueto 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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