Search found 913 matches
- Tue May 23, 2017 11:17 pm
- Forum: OpenSees.exe Users
- Topic: Activate an element through analysis
- Replies: 11
- Views: 5179
Re: Activate an element through analysis
Did you try it? Please give it a try as I know cases that it worked just fine.
- Tue May 23, 2017 11:13 pm
- Forum: OpenSees.exe Users
- Topic: Diaphragm and NL beam modelling
- Replies: 14
- Views: 12299
Re: Diaphragm and NL beam modelling
If the truss method works for your case and your results are good, you should proceed with that. You don't need to necessarily use the equal dof constrain in the axial direction.
To explore the issue with the equal dof solution, what is the constraints handler that you are using?
To explore the issue with the equal dof solution, what is the constraints handler that you are using?
- Tue May 23, 2017 10:28 am
- Forum: OpenSees.exe Users
- Topic: Nonprismatic section
- Replies: 3
- Views: 3567
Re: Nonprismatic section
You can divide your element into several elements and assign different sections (or I and A depending on the element that you use) to each element. If you use enough number of elements, you can have a good enough approximation.
- Sun May 21, 2017 11:38 pm
- Forum: OpenSees.exe Users
- Topic: zeroLength element: recording multiple materials
- Replies: 2
- Views: 2987
Re: zeroLength element: recording multiple materials
You can use the force recorder to record all forces of the zerolength element. Below is an example:
recorder Element -file name.out -time -ele 11 force;
recorder Element -file name.out -time -ele 11 force;
- Sun May 21, 2017 11:25 pm
- Forum: OpenSees.exe Users
- Topic: timber section
- Replies: 1
- Views: 2255
Re: timber section
Please check the list of available NDmaterials from the link below and see if any of them is useful for your purposes.
http://opensees.berkeley.edu/wiki/index ... al_Command
http://opensees.berkeley.edu/wiki/index ... al_Command
- Sun May 21, 2017 11:21 pm
- Forum: OpenSees.exe Users
- Topic: 3D model problem: frame and core walls
- Replies: 4
- Views: 4200
Re: 3D model problem: frame and core walls
You can try displacement-based elements instead of the force-based elements for the walls. However, in this case you should use more than one element (probably 4 or 5) for each wall. Since the displacement-based elements do not require an iterative element formulation, you can improve convergence fo...
- Sun May 21, 2017 11:08 pm
- Forum: OpenSees.exe Users
- Topic: Diaphragm and NL beam modelling
- Replies: 14
- Views: 12299
Re: Diaphragm and NL beam modelling
Does the second solution (the one with the truss) work properly for your 3D model?
- Sun May 21, 2017 11:03 pm
- Forum: OpenSees.exe Users
- Topic: Local force response and summation stress is different
- Replies: 4
- Views: 4844
Re: Local force response and summation stress is different
A more straightforward way to make this check can be: Change the materials to elastic materials and increase the number of fibers (30x30 for example). Check if the recorded stress at a particular location is equal to the theoretical value from s=My/I. If this equation holds correctly, there may be o...
- Sun May 21, 2017 10:44 pm
- Forum: OpenSees.exe Users
- Topic: Acceptable test $tol convergence
- Replies: 4
- Views: 4827
Re: Acceptable test $tol convergence
You can find an example adaptive script below. You may need to make some modifications to fit it into the rest of your script. set Tol 1.0e-8; set maxNumIter 100; set printFlag 0; set NewmarkGamma 0.5; set NewmarkBeta 0.25; set TestType EnergyIncr; set algorithmType NewtonLineSearch; for {set ik 1} ...
- Sun May 21, 2017 10:31 pm
- Forum: OpenSees.exe Users
- Topic: steel plate shear wall
- Replies: 5
- Views: 2407
Re: steel plate shear wall
There are different methods in literature to model steel shear walls. What are you using in your case, trusses?
- Sun May 21, 2017 10:26 pm
- Forum: OpenSees.exe Users
- Topic: Acceptable test $tol convergence
- Replies: 4
- Views: 4827
Re: Acceptable test $tol convergence
Please see the below reference for investigation of the effect of convergence tolerance on several response parameters of bridges. In that paper 1e-5 is observed to be adequate for energy norm. However, the best strategy is to start with a small tolerance like 1e-8 and try iterations with increasing...
- Sun May 21, 2017 10:07 pm
- Forum: OpenSees.exe Users
- Topic: curve curvature depending the time
- Replies: 1
- Views: 890
Re: curve curvature depending the time
Yes it is possible to output curvature using the section deformation recorder. An example is provided below:
recorder Element -file ele1sec1Defo.out –time -ele 1 section 1 deformation
recorder Element -file ele1sec1Defo.out –time -ele 1 section 1 deformation
- Sun May 21, 2017 10:04 pm
- Forum: OpenSees.exe Users
- Topic: Help
- Replies: 3
- Views: 4272
Re: Help
Please check http://opensees.berkeley.edu/OpenSees/user/download.php for downloading OpenSees and installing tcl.
You can find many tcl file examples in
http://opensees.berkeley.edu/wiki/index ... les_Manual or
http://opensees.berkeley.edu/wiki/index ... les_Manual
You can find many tcl file examples in
http://opensees.berkeley.edu/wiki/index ... les_Manual or
http://opensees.berkeley.edu/wiki/index ... les_Manual
- Sat May 20, 2017 4:18 pm
- Forum: OpenSees.exe Users
- Topic: Error in Triple Friction Pendulum Element example
- Replies: 5
- Views: 5259
Re: Error in Triple Friction Pendulum Element example
Please see the explanation provided by the user ndao.
- Sat May 20, 2017 4:16 pm
- Forum: OpenSees.exe Users
- Topic: Buckling
- Replies: 1
- Views: 2280
Re: Buckling
You can simulate global buckling using corotational transformation and a small initial offset in the middle of the element (could be 1/1000 of the element length).
http://opensees.berkeley.edu/wiki/index ... sformation
http://opensees.berkeley.edu/wiki/index ... sformation