"excesive" number of modes for a structure

memoalcr · ‎10-05-2020

I am looking for suggestions on how to make this model more efficient. To me it is a fairly regular structure, but with 300 modes I am only able to obtain 23% mass participation.

For some reason I can not upload the file "The attachment's adminnr.rtd content type (application/octet-stream) does not match its file extension and has been removed."

Any suggestions out there?

memoalcr · ‎10-05-2020

here is the file

Simau · ‎10-05-2020

@memoalcr

Your structure is too stiff.

You don't need that much shear walls. If you use instead columns + beams you'll get 90% mass participation with only 54 modes

M. Agayr
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memoalcr · ‎10-05-2020

Thank you. I agree; but is an existing structure

Simau · ‎10-05-2020

So There

M. Agayr
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Simau · ‎10-05-2020

So there is no problem for stability against horizontal loads

M. Agayr
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memoalcr · ‎10-05-2020

No. The building does not have any stability problems against lateral loads

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&quot;excesive&quot; number of modes for a structure