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thanks selimgunay! I have just fighting for the final exams last two weeks.I will try your advice!

thanks Jhno!This is a very good suggestion! the parameters I used to construct the IMK model are calculated according to the corresponding paper(I think that these parameters are not likely to be wrong.)! I guess my model has some incompatibility issues,how can I debug it? I just feel very clueless....

WARNING: CTestEnergyIncr::test() - failed to converge after: 50 iterations current EnergyIncr: 2.12244e+007 (max: 1e-006) Norm deltaX: 16.9499, Norm deltaR: 2.66389e+006 ModifiedNewton::solveCurrentStep() -the ConvergenceTest object failed in test() DirectIntegrationAnalysis::analyze() - the Algorit...

Hello，everyone I am pretty new to Opensees and am trying to model a 3X3 steel brace frames,but I have encountered some difficulties;It can't always converge;I have tried many methods to dubug,but I can't get the reasons; Would you please help me with this? I do appreciate your help.I have also attac...