Issue with Nonlinear Time History Analysis in a High-Rise Model
Posted: 10 Jan 2025, 10:12
Dear SeismoStruct Team,
I am encountering an issue while attempting to perform a nonlinear time history analysis on my model. The details of my model are as follows:
- A 50-story structure consisting of shear walls, cores, and beams.
- All elements are modeled as force-based elements.
- Eigenvalue analysis and pushover analysis run successfully without issues.
However, when I try to run a nonlinear time history analysis, the program frequently stops responding without displaying any error messages. I can only close it using the Windows Task Manager.
Additional Observations:
The model successfully completes the analysis only under these conditions:
Number of steps: 1000
Time step: 0.05
and changing some factors in (Convergence criteria factors & Global iterative strategy & Element iterative strategy).
However, this configuration is not suitable for my analysis needs.
My original earthquake excitation has 10,000 steps with a time step of 0.005, but this causes the program to stop.
When I reduce the number of steps to 2500 with a time step of 0.02 (which is the configuration I wish to use), the same problem occurs.
and I tried another EQ excitations but I faced the same problem.
Despite multiple trials and adjustments, the issue persists.
Could you please suggest any solutions or adjustments that may help resolve this issue? Your guidance would be greatly appreciated.
Thank you for your support and time.
I am encountering an issue while attempting to perform a nonlinear time history analysis on my model. The details of my model are as follows:
- A 50-story structure consisting of shear walls, cores, and beams.
- All elements are modeled as force-based elements.
- Eigenvalue analysis and pushover analysis run successfully without issues.
However, when I try to run a nonlinear time history analysis, the program frequently stops responding without displaying any error messages. I can only close it using the Windows Task Manager.
Additional Observations:
The model successfully completes the analysis only under these conditions:
Number of steps: 1000
Time step: 0.05
and changing some factors in (Convergence criteria factors & Global iterative strategy & Element iterative strategy).
However, this configuration is not suitable for my analysis needs.
My original earthquake excitation has 10,000 steps with a time step of 0.005, but this causes the program to stop.
When I reduce the number of steps to 2500 with a time step of 0.02 (which is the configuration I wish to use), the same problem occurs.
and I tried another EQ excitations but I faced the same problem.
Despite multiple trials and adjustments, the issue persists.
Could you please suggest any solutions or adjustments that may help resolve this issue? Your guidance would be greatly appreciated.
Thank you for your support and time.