The OpenSees Community

Hello everyone, I am currently working on a project where I want to model a cantilever retaining wall, following Wiki's example. However, I am facing a problem where the wall element crosses the soil element during the excavation process in certain condition, such as when the wall is a 10-meter flex...

Check this link:
https://portwooddigital.com/2021/12/26/ ... converter/

it helps you to convert some basic tcl codes to python.

Yes, you're right. I did exactly as you said. You can see in my previous message that I do not use kwargs ( The first line is only a comment for reference). I do not have any problem in the running of analysis. The analysis starts and finishes properly but the results are the same while I change &qu...

Hi, I want to use PDMY02 material. I have one problem regarding using it. I tried to follow the instruction to write the code for the material, I just wonder why changing the void ratio(e) does not change any results. I even model a single 2d element and simulate a triaxial test with this material, ...

Hello, I am trying to model a retaining wall using dispbeamcol and the BeamContact2D interface. Can anyone help me with its force queries? The terms are "force", "frictionforce", "scalarforce", and "masterforce". Could anyone tell what they exactly are? wiki's...

Hello, Could anyone help me how the forces are calculated in quad element? Are the results from the guass point or the nodes? I use the quad element in my analysis and I get 8 force values for each element. What are exactly those results? are they horizontal an vertical forces in each guass point or...

Dear professor Scott, I would b really grateful if you could help me with this issue. When we use uniform excitation, the values for disp, vel and accel are relative. However, if we use acceleration timeseries we can use the following command to obtain absolute values: " recorder Node -file acc...

Thank you very much.
In the uniform excitation pattern, the relative values obtained from all nodes are relative to the base node results ?

Hello,
I want to apply earthquake loading to soil model using uniform excitation command. But, from this command, we can only obtain relative values in the results. Is there anyway to obtain the absolute values?

Thank you very much

Thank you for your response.

So, Gmsh can help me in outputting the coordinate script? what is the script language? Is it possible to change it to a python script to feed that to OpenSEESPY?

Hi,

Is there any software for pre-processing (to build the geometry of the model, and then import them to Python to perform the analysis)? I guess there are STKO and GiD, but they only output the tcl scripts, right?

Thank you for your help!

Kamyar

Thank you very much for your response. The uniform excitation input file is an acceleration time history. Are there any sources to know how the equivalent forces are calculated? Furthermore, the other way to apply dynamic load is using velocity time history and dashpots. In using the uniform excitat...

Hello all, I am modeling a soil column in Openseespy. When I apply the acceleration time history as uniform excitation, is it applied to all the base nodes? besides that, when the acceleration is applied by using this pattern, the acceleration time history is zero at the base nodes and increases gra...

Hello, I want to exert a sine wave motion to a soil model in Openseespy. I have written the codes as written below:" ops.timeSeries('Sine', 50, 0.0, 10.0 , 2, '-factor', cFactor) ops.pattern('UniformExcitation', 32, 1, '-accel', 50) But the problem is that all displacements, accelerations, and ...