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May I ask why it flashes back after opening STKO? Last night I did a dynamic analysis with dense grids and then STKO flashed back, today all the scd files except for some of the simplified model files are flashing back as soon as I open them.

Dear stko team:
Excuse me: Why does the program crash when I click on "[1] Concrete" in "Physical Property" or modify the parameters inside?

May I ask what is the difference between "displacement-based beam column element" and "force-based beam column element"? Why do the hysteresis curves of the same model drawn using two different elements differ so much, and it seems that the hysteresis curves drawn using the displacement method are ...

Here is my final model file. Thank you very much for your help.

Thank you for your answer. I have used the method you mentioned, but it seems that I cannot find the source of non-convergence. I would like to know if this non convergence is caused by the model parameters of pinching4, incorrect use of rigidlink, or the method of establishing rigid regions.

Firstly, thank you for your help. However, after I changed the material in it to "concrete02", the result of the proposed static analyses is almost unchanged and still does not converge. Below are the screenshots of the parameters of concrete02 and the results of the analysis.

Please help me. This is a two-storey masonry structure built using the equivalent frame modelling approach. When performing gravity analysis and proposed static analysis to obtain the hysteresis curve of the structure, the gravity analysis works fine, but the results of the proposed static analysis ...