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Allisa [31]
3 years ago
14

Why are bridges declared unsafe after a long use​

Physics
1 answer:
lina2011 [118]3 years ago
8 0

After it's long use, the bridge continuously undergoes through alternating strains. in result, the elastic strength of the bridge gets reduced. while the process goes on the bridge makes elastic fatigue and a permanent change happens which makes it collapse which is the reason why bridges are declared unsafe after a long use​ :)

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