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You can only record stresses and strains for fiber elements with cross sections of interest. To record a particular fiber number: recorder Element $ele -file $filename section $sec fiber $i stressStrain To record at a y,z coordinate in the section: recorder Element $ele -file $filename section $sec ...

Steel03:
uniaxialMaterial Steel03 tag? fy? E0? b? r? rtype? <a1? a2? a3? a4?>
try with rtype = 2 (Dhakal and Maekawa), r = 20 for starters

Concrete04:
uniaxialMaterial Concrete04 $matTag $fc $ec $ecu $Ec <$ft $et> <$beta>

It struck me as a need for future model generation, debugging, sharing, and visualization that there be a standard in terms of a model file I/O feature. Let me motivate this by saying that a lot of the power in the usage of OpenSees is derived from the fact that it is built upon the tcl scripting la...

The -mass switch on nonlinearBeamColumn doesn't work, I've posted it in bugzilla already but perhaps it will help if you do as well.

ok, while I'm continually making some more errors, I just noticed it says Elastic ElasticPPGap, which is of course not true, it's just ElasticPPGap

errr, sorry, the eta comes before the damage in the new version, but can be omitted so that the previous syntax is still valid. ie, the old way works: uniaxialMaterial Elastic ElasticPPGap $matTag $E $Fy $gap <damage> and the new way is: uniaxialMaterial Elastic ElasticPPGap $matTag $E $Fy $gap <eta...

silvia, this is the current syntax: uniaxialMaterial Elastic ElasticPPGap $matTag $E $Fy $gap <damage> but Frank is sitting on a new version that has kinematic hardening built in, so the syntax in a day or so will then become: uniaxialMaterial Elastic ElasticPPGap $matTag $E $Fy $gap <damage> <eta?>...

yes, just add the word
damage
to the end of your uniaxialMaterial

it functions as you would expect

It didn't come from a reference. I coded it from scratch.