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Hi, Here is the command as defined in the website: https://opensees.berkeley.edu/wiki/index.php/PDMY03_elementdriver nDMaterial PressureDependMultiYield03 $matTag 2 $massDen $refG $refB $frinctionAng \ $peakShearStrain $refPress $pressDependCoe $phaseTransAng \ 0 $contraction_a $contraction_b $contr...

Hi everyone,

PDMY03 model (PressureDependMultiYield03) is not working while running OpenSees and I have the warning of not being able to create this material model.
I will appreciate any idea about this case.

Thanks!

Hi everyone, I wanna use PyLiq and TzLiq materials for the soil-pile interface in my modeling. In the material properties explanation, the timeseries for the mean eff. stress is needed. I have three questions related: 1. How shall I get this stress and implement in my material definition? 2. 'Pult' ...

Dear all, I am doing 2D modeling and I need to consider soil-pile interaction in my analysis. I am using PDMY for my soil domain with 9-4 quad UP elements. I checked the OpenSees website and also read some papers related to how to consider soil-pile interaction but unfortunately could not find the e...

Hi,

I have just soil domain in this stage and I am using PDMY02 material. Would you please share the eigenvalue analysis command for soil domain in OpenSees in order to check the frequencies?

Many thanks,

Hi, Many thanks for your response. I was doing a nonlinear dynamic analysis. I increased the iterations, but again I got convergence error. I noticed that I need to do the plastic gravity analysis also for the soil domain before applying my load. I decided to do this but I got convergence error agai...

Hi everyone, I am doing nonlinear analysis for my soil-pile-structure problem and after about 12 hours of run, I face a convergency error which is at the middle time for my analysis. I increased the number of iterations but again I got this error after a long time of running. I will appreciate your ...

Hi everyone, I am running a time history analysis in OpenSees. I receive a warning about invalid nodeId after it reads one of the loadings defined for a node. That node exists in my model, but I am wondering why I receive this warning. I am defining as this to read the loads from a txt file and appl...

Hi everyone, I am running a time history analysis in OpenSees. I receive a warning about invalid nodeId after it reads one of the loadings defined for a node. That node exists in my model, but I am wondering why I receive this warning. I am defining as this to read the loads from a txt file and appl...

Hi everyone,

I am looking for the best soil constitutive model in OpenSees to capture the pore water pressure generation which is quite important for liquefaction. I will appreciate your suggestions in this respect.
Bests,

Ok, many thanks for your explanations.
Bests,

My total model is a pile inside a soil medium. First I decided to make the eigen value analysis to take the natural frequencies for just the soil medium wo the pile and check the natural frequencies from OpenSees with that equation to see if I am doing right in modeling. That is why I wanna do eigen...

It is a sandy soil, using PDMY2 model and quadUP elements.
I am modeling a soil medium of 70m*30m and wanted to do the eigen value analysis for this. Shall I just model it as a column to see the natural frequencies?
Many thanks,

Hi, I am using elastic analysis. You mean effective stress values in the output? I am using these values for PDMY2 material" # Soil -material parameters definition set massDen 1.99; #(ton/m3) set refG 75.71e3; # (kPa) set refB 202.14e3;# (kPa) set frinctionAng 31.33; set peakShearStrain 0.1; set ref...

Hi everyone, I am doing eigen value analysis for the soil medium with quadUP elements and PDMY2 material model. The rate for period in simulation is higher than what I am expecting by the formulation of 4H/vs (about 10 times). I checked the steps but do not know where the problem is. I will apprecia...