Search found 533 matches
- Mon Mar 01, 2021 5:39 am
- Forum: OpenSees.exe Users
- Topic: Lumped Mass system
- Replies: 2
- Views: 52
Re: Lumped Mass system
Do not use the Linear algorithm if you have nonlinear response! Use Newton.
- Sun Feb 28, 2021 6:14 am
- Forum: OpenSees.exe Users
- Topic: MDOF lumped mass model
- Replies: 4
- Views: 79
- Sat Feb 27, 2021 6:08 am
- Forum: OpenSees.exe Users
- Topic: MDOF lumped mass model
- Replies: 4
- Views: 79
Re: MDOF lumped mass model
Eigenvalue analysis is not required to do response history analysis.
- Thu Feb 25, 2021 5:38 am
- Forum: OpenSeesPy
- Topic: Openseespy can't calculate all seismic load steps completely
- Replies: 2
- Views: 85
Re: Openseespy can't calculate all seismic load steps completely
Please provide more details. Are you sure the models are exactly the same?
- Sun Feb 21, 2021 9:17 pm
- Forum: OpenSeesPy
- Topic: WARNING element type ShellNLDKGT is unknown
- Replies: 1
- Views: 69
Re: WARNING element type ShellNLDKGT is unknown
Thanks for reporting this. Looks like this element is in Tcl but not in the Python interpreter for some reason. I will add it.
- Wed Feb 17, 2021 6:00 am
- Forum: OpenSees.exe Users
- Topic: only-compression material
- Replies: 1
- Views: 76
Re: only-compression material
Use Hysteretic or MultiLinear material and set the strength values on the tension side to be very low. It's not elegant, but it should work.
- Wed Feb 17, 2021 5:57 am
- Forum: OpenSees.exe Users
- Topic: When buckling analysis in OpenSees?
- Replies: 1
- Views: 76
Re: When buckling analysis in OpenSees?
Probably not. But you can perform direct analyses to get buckling loads: https://wp.me/pbejzW-Bh
- Wed Feb 17, 2021 5:52 am
- Forum: OpenSeesPy
- Topic: Adding new p-y material in opensees
- Replies: 2
- Views: 123
Re: Adding new p-y material in opensees
Develop it as p-y. Uniaxial materials are scalar functions and have no inherent meaning. The calling objects treat the functions appropriately.
- Mon Feb 15, 2021 6:59 am
- Forum: OpenSees.exe Users
- Topic: Step time dependent material
- Replies: 5
- Views: 203
Re: Step time dependent material
It could be an error in the material state determination, or in how you set up the testing script. I can't really tell.
- Fri Feb 12, 2021 5:29 am
- Forum: OpenSees.exe Users
- Topic: Step time dependent material
- Replies: 5
- Views: 203
Re: Step time dependent material
You can get the time step from ops_Dt, a global variable. Search the source code for it. You can see an example in BilinearOilDamper.cpp.
- Thu Feb 11, 2021 5:59 am
- Forum: OpenSees.exe Users
- Topic: Hysteretic material
- Replies: 1
- Views: 656
Re: Hysteretic material
No, you can only define three points on the backbone of the HystereticMaterial.
- Sat Feb 06, 2021 7:46 am
- Forum: OpenSees.exe Users
- Topic: ArpackSolver::Error with _saupd info = -9999
- Replies: 2
- Views: 440
Re: ArpackSolver::Error with _saupd info = -9999
Try asking for one or two modes instead of five.
- Thu Feb 04, 2021 1:39 pm
- Forum: OpenSeesPy
- Topic: Question on the best practice to run multiple OpenSeesPy sessions in parallel
- Replies: 2
- Views: 761
Re: Question on the best practice to run multiple OpenSeesPy sessions in parallel
This presentation by Dr. Minjie Zhu describes parallel computing with OpenSeesPy very well: https://youtu.be/vjGm2kM5Ihc
- Tue Feb 02, 2021 12:56 pm
- Forum: OpenSeesPy
- Topic: fiber section stress-strain output through recorder command
- Replies: 9
- Views: 1613
Re: fiber section stress-strain output through recorder command
This will be fixed in the next version of OpenSeesPy. For now, use str() like described here: https://wp.me/pbejzW-Si
- Tue Feb 02, 2021 12:52 pm
- Forum: OpenSeesPy
- Topic: Warning material type FluidSolidPorousMaterial is unknown
- Replies: 3
- Views: 450
Re: Warning material type FluidSolidPorousMaterial is unknown
Thanks! I will update the documentation.