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Dear Vesna, - I have a problem on running the given example. The error: "OpenSees > analyze failed, returned: -2 error flag ProfileSPDLinDirectSolver::solve() - aii < 0 (i, aii): (0,0) DisplacementControl::newStep(void) - failed in solver StaticAnalysis::analyze() - the Integrator failed at ite...

Following I present the model I have done. If someone check it and notice the error, please let me know! Thanks in advance. puts "Begin Pinching_Definition" puts " ------------- " ###################################### puts "# Creat Model Builder, Nodes and Boundary Conditio...

I'm trying to model a PINCHING4 material under cyclic behaviour! Problem: I don't know why, but there's always errors in the model of the cyclic behaviour. Firstly, I followed the tutorial. For my model it made sense to use the following code, but it didn't run. http://opensees.berkeley.edu/wiki/ind...

Dear Vesna,

I kindly ask you for a check up on the previous command. I can't progress on my thesis work and the deadline is getting closer.

Graciously,
Daniel Castro

Dear Vesna,

Is there any chance you check up the commands I developed?

Best regards.

Dear Vesna, I'm trying to develop a pinching material, however I always get an error. Immediately it stops in the first increment. Could you please check the code and give me some advices about it? Best regards. .................................................. puts "Begin Pinching_Definition&...

Dear, I need to model a pinching4 material for my work, however I have got a problem. Both OpenSees tutorial as OpenSees Wiki are not clear to explain the "unloading stiffness degradation", "reloading stiffness degradation" and "strength degradation". Well there is an e...