The OpenSees Community

Hello, My name is Carlota Gama, I'm a Civil Engeneering student in the New University of Lisbon and I have a doubt about the stress record in example 15 in the OpenSees Geotechnical Simulation Capabilities. Supposedly the stress output should follow the order: Txx, Tyy, Tzz, Txy and nr. However, the...

Hello, I need help figuring why a very simple square elastic model under 0.1 g accelerogram shows no deformation at all, i.e. all the nodal points have the same approximate acceleration output record and the relative displacements are smaller that 10e-13m . It's a block with 40x30 (m), Young's modul...

I'm trying to model a port structure (Caisson Quay Wall). I started by making simple models but always with the material pressure dependent. I'll start over but with the material pressure independent, like you suggested, to see if I make better progress.

Thank you for all

Yes, I know but I tried to put two types of boundary conditions (restricting the vertical displacements on both sides and put the same displacement on both sides with the command equalDOF) and even then the analysis fails. Boundary conditions: equalDOF 3 494 1 2 equalDOF 5 495 1 2 equalDOF 11 499 1 ...

Is there any news about this problem?

Thanks

Thank you. I'll wait for an answer.

Yes, it work.
I did the same example but wiht the nDMaterial PressureDependMultiYield in saturated, undrained elastic-plastic state (coupled with FluidSolidPorous Material) and this example worked well.

element quad 473 515 528 534 521 1 PlaneStrain 1 $press 0.0 $unitWeightX $unitWeightY element quad 474 510 523 528 515 1 PlaneStrain 1 $press 0.0 $unitWeightX $unitWeightY element quad 475 502 518 523 510 1 PlaneStrain 1 $press 0.0 $unitWeightX $unitWeightY element quad 476 492 511 518 502 1 PlaneSt...

Hello, I need help, I don't understand why this happend. I know the model is large but it shoud run normaly. When I run the model gives me the following error: CTestNormDispIncr::test - failed to converge What could be wrong? file mkdir Data set accMul 1 ;# acceleration multiplier set massDen 2 ;# s...

Fixing the boundary conditions I can get fairly consistent results. My goal is to reach a much more complex structure but for this I have to go through all the intermediate stages. Making two blocks side by side occur exactly the same, OpenSees only runs with tolerances of 1e-4 which, as you said, i...

What I can not understand is why whenever I change the mesh I have to change these two parameters. For example, changing the tcl file for a mesh 4*4, opensees only runs with values of tolerance of 1e-2, either to gravitational analisis or dynamic analysis. Is this normal? I think it's a little stran...

I install the version 2.2.2 and try to run the scrip but still gives me the same error. Thus sending the scrip which is equal to the example 10 of the manual OpenSees Geotechnical Simulation Capabilities with the difference of having created a mesh of 2*2. set accMul 7 ;# acceleration multiplier set...

I was making a mistake on numbering the nodes. However I have another question for the same example (Example 10 of the Geotechnical Simulation Capabilities). Why by making a simple change of the example by creating a mesh with nx=2 ny=2 the convergence of the problem is not verified and increasing t...

I've tried all possible combinations, especially different nodes tags, and still can not make the meshes. I think I'll make the meshes with GID, which may be the easiest way.

Thanks,
Best regards.

Hi, I want to do 2 layers of different soils and generate at each layer a diferent mesh. I'm trying to do this with the block2D command, because is much easier and simple, but it gives me an error on the common nodes. How can I get around this? This is what I was trying to do: set Quad quad set eleA...