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High Rise Builiding Modal Mass Participating Ratio

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Rendradi

Rendradi

Structural
Aug 15, 2024
4
Hi, everyone

I'am currently modelling a 20 story apartment building (see image). But I notice that the modal mass participating ratio is already 90% at 12th mode shape. Is this reasonable? (I'am a student so my engineering sense isn't there yet)
 
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No image attached. Also, if this is an academic question. It's probably best posted in the "Student Engineer - General Discussion" forum. Some people get annoyed at students posting homework questions and the like....
 
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