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DYNAMICS IN STAAD

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luke01

luke01

Structural
Joined
May 13, 2009
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Currently I am working with Staad.Pro on an bridge model where I am looking for its dynamic performance.
In addition to its natural frequency the software also provides mass participation in percent for x,y,z.
Unfortunately, I have no idea what this data is telling me. Especially because my fundamental frequency has a Participation Y of 28%, the 2nd-4th modes have 0%, the 5th 22%,...
Could somebody please explain in easy terms (I am not a dynamic pro) what this means?

Thanks
 
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