The OpenSees Community

mhscott wrote: ↑

Wed Feb 08, 2023 3:05 pm

Use ops.constraints('Transformation')

Thank you Prof. Scott

Hi all, I am tranferring Opensees Tcl to Openseepy but encountered a problem here. The code is to model a 9-4 quad u-p element under cyclic load (sine) with PDMY03 model. The original code can be found https://opensees.berkeley.edu/wiki/index.php/PDMY03_elementdriver and I am working on the "undrain...

Dear all, I am trying to use updateMaterials function to update bulk modulus of UCSD soil models in openseespy but it seems there is no corresponding function called updateMaterials like the one in Opensees (https://opensees.berkeley.edu/OpenSees/manuals/usermanual/4246.htm). I cannot find it in the...

Hi all, Just in case someone is also interested in this topic. The reason my code didn't work was the I set the wrong boundary condition on two nodes (dof 3, pore pressure). [/ # -*- coding: utf-8 -*- """ Created on Sat Jul 23 11:13:25 2022 @author: Zhongze Xu, the University of Texas at Austin 1D c...

mhscott wrote: ↑

Thu Jul 28, 2022 8:39 am

With a little more useful error messages, it seems the issue is with node 1
"FATAL ERROR NineFourNodeQuadUP tag=0 has wrong number of DOFs at node 1"

Thank you for all the help Prof. Scott! I will try to correct the error and put the correct code here.

mhscott wrote: ↑

Wed Jul 27, 2022 8:20 pm

What version of OpenSeesPy are you using? version 3.4.0.2 is the newest

Yes 3.4.0.2, the latest version of openseespy

sorry that the original code I posted has some errors but I have update the code. If there is wrong with the code, error or warning should be given by python but the only thing I can see is the warning that kernel dead. I tried with Spyder and Jupyter Notebook. Both Macos and Windows 11. All same is...

I am practicing a 1-D consolidation with 9_4_quadUP elements. The original tcl code can be found at https://opensees.berkeley.edu/wiki/index.php/One-dimensional_Consolidation The problem I have is that op.element('9_4_QuadUP', eleTag, nI, nJ, nK, nL, nM, nN, nP, nQ, nR, thick, matTag, bulk, H2ODensi...

mhscott wrote: ↑

Tue May 03, 2022 6:16 am

ops.timeSeries('Path',1,'-time',...) #https://openseespydoc.readthedocs.io/en ... athTs.html
ops.pattern('Plain',2,1)
ops.sp(3,...)
ops.sp(4,...)

Thank you very much Prof. Scott!

Dear all, I am transferring the opensees pm4sand example to openseespy. I am currently stuck on one command: set ts1 "{Series -time {100 80000 1.0e10} -values {1.0 1.0 1.0} -factor 1}" eval "pattern Plain 2 $ts1 { sp 3 2 $vDisp sp 4 2 $vDisp }" Openseespy does not seems to have this Series function ...