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Negative Eigenvalue for 16-sty Building with 2 transfer floors

sohjiangwen

Civil/Environmental
Joined
Jun 29, 2025
Messages
1
Dear All,


I have been trying to solve this model for weeks but have yet to succeed. I would greatly appreciate it if any kind-hearted experts could lend a hand.

I believe the complexity of the building, particularly the multiple transfer floors, is contributing to the difficulty. The main issue I’m facing is that the model is ill-conditioned, and I’m trying to fix this.

I’ve read numerous articles and tried various methods, but the issue remains unresolved. I would truly appreciate any assistance.

The model file is attached for your reference. Thank you in advance.https://rspsgp-my.sharepoint.com/:u...RPvt8KXUaFQw8B6cTwhQLzgl20pbRV30La0Q?e=PjS210
 

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