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Dear STKO team,

I'm working on validating a numerical model that simulates the cyclic response of RC rocking walls. I'm trying to simulate quasi-static cyclic test results available in the literature. However, when I tried to increase the number of analysis steps, the analysis stopped without any warning. While the number of analysis steps was larger, the analysis stopped earlier.

I wonder if there is an upper limit for the number of analysis steps.

I would appreciate it if you could help me with this.

I attached screenshots of the command line and monitor windows.

Thanks,

Franco

Hi, without detailed information and also the model, It's difficult to provide you with solution. There could be many reasons.

Hi kesavapraba,

Thanks for replying. I don't know what information you need, the analysis ends without a warning or error (the last step converged with one iteration).

I would like to know if there is an upper limit for the number of analysis steps or recorded data. I ask this because when I check the .mpo database for different numbers of analysis steps after the analysis stops, the size is the same (see attached figure).

Thanks again.

Franco

Hi, Number of analysis steps do not make the analysis to stop. Also, it is not clear to me from your post the number of analysis steps that you used and the analysis settings (allgorithm, error norm etc.). Without such details, it is challenging to debug and suggest any solution. When you say that the model stops after a certain steps, the structure might have reached its failure point! If the model is available, one can atlleast check and try to provide the solution.

I don't know the details of your model but certainly there are some issues!
Looking at the output from opensees you can see that you accept a huge error! 1.0e11.
In this way, the results are garbage and the simulation can suddenly blow up.