Search found 913 matches
- Tue Feb 02, 2021 3:48 pm
- Forum: OpenSees.exe Users
- Topic: could not open file
- Replies: 1
- Views: 1324
Re: could not open file
It may be that you don't have the at2 ground motion file in the correct folder.
- Sat Jan 23, 2021 11:13 am
- Forum: OpenSees.exe Users
- Topic: ConcreteCM stress strain curve
- Replies: 1
- Views: 2210
Re: ConcreteCM stress strain curve
You can record the stress and strain at one of the fibers in your section that has the concreteCM material.
Please see the example at the bottom of this link here: https://opensees.berkeley.edu/wiki/inde ... t_Recorder
Please see the example at the bottom of this link here: https://opensees.berkeley.edu/wiki/inde ... t_Recorder
- Fri Jan 22, 2021 12:44 pm
- Forum: OpenSees.exe Users
- Topic: Is the ReinforcingSteel material sensitive to units of measure?
- Replies: 3
- Views: 3465
Re: Is the ReinforcingSteel material sensitive to units of measure?
To eliminate the possibility that unit change leads to other changes in your tcl file and the model, could you check the initial slope of the resulting moment curvature in both cases.
- Thu Jan 14, 2021 12:01 pm
- Forum: OpenSees.exe Users
- Topic: SDOF with a dashpot
- Replies: 3
- Views: 3556
Re: SDOF with a dashpot
Are you modeling the nonlinear dashpot in Matlab? If you are not, the difference could be because of that
- Thu Jan 14, 2021 11:59 am
- Forum: OpenSees.exe Users
- Topic: steel tube slip
- Replies: 2
- Views: 1189
Re: steel tube slip
There is a bond slip material that is available to model the slip between rebars and concrete. You can explore if you can use this somehow to model the slip between concrete and the steel tube: https://opensees.berkeley.edu/wiki/index.php/Bond_SP01_-_-_Strain_Penetration_Model_for_Fully_Anchored_Ste...
- Thu Jan 14, 2021 11:55 am
- Forum: OpenSees.exe Users
- Topic: Singular Matrix Error - for Shearwall Pushover Analysis
- Replies: 6
- Views: 6314
Re: Singular Matrix Error - for Shearwall Pushover Analysis
You can try directly using the rigid link command instead of a rigid element
https://opensees.berkeley.edu/wiki/inde ... nk_command
https://opensees.berkeley.edu/wiki/inde ... nk_command
- Wed Jan 06, 2021 10:16 am
- Forum: OpenSees.exe Users
- Topic: SDOF with a dashpot
- Replies: 3
- Views: 3556
Re: SDOF with a dashpot
If your viscous material has a linear force-velocity relation, i.e. f=Cv, you can just use mass proportional damping
- Fri Jan 01, 2021 3:17 pm
- Forum: OpenSees.exe Users
- Topic: plastic hinge (only beam element)
- Replies: 3
- Views: 3519
Re: plastic hinge (only beam element)
You can try using Reinforcing Steel material. Another option is to determine the collapse point during postprocessing
- Wed Dec 30, 2020 11:42 am
- Forum: OpenSees.exe Users
- Topic: Output not being recorded
- Replies: 2
- Views: 1268
Re: Output not being recorded
Is the pushiver analysis completed? You can add an exit command to the very bottom of your script and see if there is data in the recorder output files
- Wed Dec 23, 2020 3:47 pm
- Forum: OpenSees.exe Users
- Topic: axial force problem on nonlinear beam element
- Replies: 6
- Views: 5425
Re: axial force problem on nonlinear beam element
Yes that looks right. Let's see how your results look like when you include that.
- Wed Dec 23, 2020 2:33 pm
- Forum: OpenSees.exe Users
- Topic: axial force problem on nonlinear beam element
- Replies: 6
- Views: 5425
Re: axial force problem on nonlinear beam element
The solution in the first post looks like a reasonable solution. Or instead of modeling a fiber section, you can compute the moment-curvature relation of the beam offline and assign it to your section.
- Sun Dec 20, 2020 4:18 pm
- Forum: OpenSees.exe Users
- Topic: Bouc-wen model and ZeroLength Element
- Replies: 3
- Views: 3434
Re: Bouc-wen model and ZeroLength Element
The results should change I think. Could you try replacing the Bouc-Wen with an elastic material and see if the results change when you change the parameters?
- Sun Dec 20, 2020 1:40 pm
- Forum: OpenSees.exe Users
- Topic: Bouc-wen model and ZeroLength Element
- Replies: 3
- Views: 3434
Re: Bouc-wen model and ZeroLength Element
You need to define the Bouc-wen material as a unizxialmaterial and assign it to your zerolength element
https://opensees.berkeley.edu/wiki/inde ... n_Material
https://opensees.berkeley.edu/wiki/inde ... th_Element
https://opensees.berkeley.edu/wiki/inde ... n_Material
https://opensees.berkeley.edu/wiki/inde ... th_Element
- Fri Dec 18, 2020 8:47 am
- Forum: OpenSees.exe Users
- Topic: Apply the load only at base of frame
- Replies: 1
- Views: 2180
Re: Apply the load only at base of frame
You can apply the vertical gravity forces only at the first floor nodes
- Thu Dec 17, 2020 11:14 am
- Forum: OpenSees.exe Users
- Topic: RC Frame Pushover Curve
- Replies: 3
- Views: 1307
Re: RC Frame Pushover Curve
It should, but you can make the same stress-strain checks for the fibers of the section at the top end of the column and the beam end. If you are using a constraint that sets the elongation/shortening of the beam to be zero, that has an unintended consequence of introducing axial force on the beam s...