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Hi,

Could you please help me to model lumped plasticity under cyclic loading.
i have used RotSpring2DModIKModel.tcl but i have confused about 10 parameters (LS LK LA LD cS cK cA cD DP DN). I could not find any formulation calculate the values.

Could anybody help me please?

tnx

thank you,
You mean this model is not suitable for RC? Which model you recommend for plastic hinges in RC beams and columns?

Hi, could you please help me to understand "RotSpring2DModIKModel" six parameters. (LS,LK,LA,LD,CS,CK,CA,CD) which are related to cyclic deterioration based on Ibarra Krawinkler Deterioration Model. i want exactly know how to calculate these parameters. in my case it is rc section under cy...

Hi,

may i have your models details? i have got confused with my comparisons in this two method of modeling!!

thanks

Following parameters make an important role in analysis results. So how can i be sure which value is suitable to be considered for each one? (As an example i compared LS1 = 1.0 and LS2 = 1000 LS1 result no deterioration) set LS 1000.0; # basic strength deterioration (a very large # = no cyclic deter...

shear force - drift curve looks wrong! strength and stiffness deterioration is not observed!?
but backbone curve (moment-curvature) seems right!!

Hi, Could you please help me about this non convergence and warning! Thanks (i also copied my script.) Ec = 30769.358811184036 Modified Ibarra-Medina-Krawinkler Model with Bilinear Hysteretic Response T = 0.22599913714961264 Model Built 2e-3 Is Done -4e-3 Is Done 2e-3 Is Done -4e-3 Is Done 2e-3 Is D...

OMG!!!
thank you very much!

Hello, i have used using " rotspringModiKModel" to model a concentrated plastic hinge in a SDOF simplified column with lumped mass on top. I wonder what is wrong with this model! please help me Following is my simple model script! first it's error is: Starting OpenSees.. Modified Ibarra-Me...

Oh, yes! that's right.
i really appreciate
thanks

Hi, Could any one help me to find out what does this warning mean? I have got confused! Node::addunbalLoad - load to add of incorrect size 4 should be 3 WARNING DisplacementControl::domainChanged() - zero reference loadStaticAnalysis ::setAlgorithm() - Integrator::domainChanged() failedStaticAnalysi...