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If neither the Bounding Cam Clay nor the Cap Plasticity model work, then does STKO have a model that supports cap plasticity? A cap plasticity model is necessary for geotechnical consolidation analyses. If STKO does not have a cap plasticity model it would severely limit its geotechnical ...

Hi STKO,

Following up on a previous post (https://asdeasoft.net/forum/viewtopic.php?t=3235), geotechnical settlement analyses often require a cap plasticity model. The Bounding Cam Clay model does not appear to work in OpenSees, and I was directed to use the CapPlasticity model.

I’ve attached a ...

I am still unable to get the Bounding Cam Clay model to work. Is there another material model with a cap yield surface suitable for Geotechnical consolidation problems? The old template3dep nDmaterial model had a Cam Clay option, but it is no longer available. What about the more recent ...

I've updated the material properties and analyses stages to be identical to the previously discussed single-element test. It's attached for reference (ccel.zip). I've simplified the problem so that all materials consist of the BoundingCamClay nDMaterial. I also removed the updateMaterialState ...

Hi STKO,

Following up from this post: (https://asdeasoft.net/forum/viewtopic.php?t=2615&sid=e1ede03a24303a14896484fcae8de080), I would like to automate the setup of the Bounding Cam Clay model. I've created soil properties much like I did for the single-element model, but for a small embankment ...

Thanks for the additional information and ideas. I'm actually running it in parallel using subprocess.Popen in my implementation. I thought it would be simpler to just provide the code for sequential operation. Interestingly, multiprocessing.Pool opens multiple instances of the STKO GUI, which is ...

The Python API provided enough information for me to develop my own solution. I've pasted a code snippet of my solution, which is intended only to work with the example problem posted previously. Some of the material and analysis properties hard-coded into the script and need to be modified for ...

Sure. I previously attached an example 2D slope stability problem, which I’ve attached again for convenience. The model consists of two layers, each defined by the PressureIndependMultiYield nDmaterial. I would like to programmatically modify the parameters:
• Sand fill: $frictionAng,
• Recent ...

I would like to update the cohesion ($cohesi) and friction angle ($frictionAng) of the PressureIndependMultiYield nDmaterial. Ideally, I would like to update the parameter during the analysis. As far as I can tell, the "parameter" command doesn't support updates of those parameters. So, we will have ...

Michael Scott talks a little bit about updated OpenSees parameters within the analyses loop in his blog: https://portwooddigital.com/2021/08/15/parameter-updates-in-the-loop/

All of the examples seem to be related to updating elastic material stiffness or UP element permeability. What about ...