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Hello,

I am using openseesMP for modeling a large soil medium (partitioned) and noticed a difference in the results compared to sequential analysis. What could be the reason for this deviation of openseemMP results?

hi,

I have a soil model. And I am using MultiYieldSurfaceClay material and quad elements for modeling the soil. However, I get this error when running the analysis:

FATAL:MultiYieldSurfaceClay::Can not deal with e2p

what's that mean?

Hi, I am trying to run a model of a nonlinear frame system with force-based elements using openseesSP. However, the analysis doesn't start at all and i get this error "ForceBeamColumn3d::update() -- could not invert flexibility". Although the analysis of the same model can be done successf...

Hi

I am trying to perform a site response analysis of a 2D soil model. The soil is modeled using quad elements. During the analysis, I get this warning:

WARNING DOF_Group::setID - invalid location 2 in ID of size 2

What does that mean?

Hi,

I am trying to model an elastic isotropic soil medium using plane strain formulation. So, do I need to either use only a quad element with a plane strain type or only a PlaneStrain material to impose the plane strain conditions? or should I use both?

Thanks

Hi,

I am trying to model an elastic isotropic soil and I am wondering about the appropriate material to be used.
for the ElasticIsotropic material:

nDMaterial ElasticIsotropic $matTag $E $v <$rho>

is the soil shear modulus implicitly defined in terms of E and v?

I defined a node using this command node 08010 6.00 0.00 -1.00 however, i get this error when running the model: WARNING invalid nodeTag Want: node nodeTag? [ndm coordinates?] <-mass [ndf values?]> expected integer but got "08010" while executing "node 08010 6.00 0.00 -1.00" (fil...

Hi, I am trying to model a spring-damper system in which the spring and the damper are placed in parallel. I couldn't find any material or element that would simulate that behavior. The available ViscousDamper material simulates a spring and a damper put in series, and the Viscous material isn't all...

Try with Newmark instead of alphaOS. Also, see if you have issues with all elastic materials. I use newmark as the primary integrator. But then I use a convergence approach that incorporates different nonlinear algorithms, integrators, time step sizes and tolerance values. Here it is: # %%% DYNAMIC...

This forum is generally for OpenSeesPy (Python) specific questions. But, perhaps you can make all your uniaxialMaterials Elastic and see if you have convergence problems. Here are some steps to follow: https://wp.me/pbejzW-1C It's difficult to say what the problem is based on your post. A screen sh...

Hi, I am modelling a 5-story, 2-bay and 1-bay in the horizontal two directions, RC structure. For performing a nonlinear seismic analysis, I once used a dispbeamcolumn element and then forcebeamcolumn element for modeling both beams and columns. In terms of convergence, the dispbeamcolumn element wa...

i figured out the problem. It is because i defined the element recorder like that: recorder Element -file Results/Force11111.out -time -ele 11111 section 1 force But once I deleted the "seciton 1" part, the results are reasonable. But I still don't understand what the results at the sectio...

selimgunay wrote: ↑Sat Aug 22, 2020 12:27 pm This looks like a simply supported boundary condition. I would recommend checking the boundary conditions for the bottom nodes of your columns.

This is the command I used for the boundary conditions

fixY 0.0 1 1 1 1 1 1

Hi, I am carrying out dynamic analysis on a 3D RC structure with fixed supports using a bidirectional earthquake. When I extract the straining actions of the base columns at the base section, i get no moments about the x and y axes. why is that? All frame elements are modeled using the dispBeamColum...

Hi, i am trying to run three files [model.tcl, Gravity.tcl, PushX.tcl] from inside another file using the "source" command: wipe; puts [pwd]; source model.tcl; puts [pwd]; source Gravity.tcl; source PushX.tcl; All files are in the same folder. However, when i try running the script, the cu...