Thank you for your comments. I will revise the model accordingly:
1. I will correct the frame connectivity by ensuring proper intersections so that all transverse beams are fully connected to the border beams.
2. I will remesh the truss members so that each member is modeled as a single element ...
Search found 2 matches
- Fri Feb 20, 2026 3:43 pm
- Forum: Analysis
- Topic: ProfileSPDLinDirectSolver Error (aii < 0) in BRB Model
- Replies: 3
- Views: 302
- Tue Jan 27, 2026 6:52 am
- Forum: Analysis
- Topic: ProfileSPDLinDirectSolver Error (aii < 0) in BRB Model
- Replies: 3
- Views: 302
ProfileSPDLinDirectSolver Error (aii < 0) in BRB Model
I am currently using STKO in OpenSees to model a Buckling-Restrained Brace (BRB) frame, but I am encountering a persistent stability error that I cannot resolve.
The Error: When running the analysis, I receive the following error immediately: ProfileSPDLinDirectSolver::solve() - aii < 0 (i, aii ...
The Error: When running the analysis, I receive the following error immediately: ProfileSPDLinDirectSolver::solve() - aii < 0 (i, aii ...