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Modal analysis question

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RamiHabchi93

Civil/Environmental
Joined
Jan 22, 2017
Messages
26
Location
DE
Hi, I have a question:
In modal analysis, to get the displacement of a story we combine story displacements obtained from each mode.what is the reason behind this?
 
When waves of different periods add constructively, you get a bigger wave.

Reaction to change doesn't stop it :-)
 
To the OP, a course on vibration analysis should have been a requirement in your line of work.
 
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