The OpenSees Community

Take a look at your model builder command: http://opensees.berkeley.edu/OpenSees/manuals/usermanual/403.htm Say you have the SDOF below: x---------------o --->F A fixed end support at "x" and element between "x" and "o" with no support at "o" and a force F applied at "o". If you model the it with -n...

With the script I have posted you are about 90% of the way to solving your problem. You need to modify the script now to add uniformly distributed load instead of the one point load I inserted and play with the stiffness value of the rotational spring until you get the moment resistance you want.

Your question is a little unclear, but if I wanted to have a beam, with rotational springs at it's ends instead of pins, I might do something like this. # Create ModelBuilder (with two-dimensions and 3 DOF/node) model basic -ndm 2 -ndf 3 # Set parameters for overall model geometry set length 360 # C...

Thanks for the answer. Yes. That is what I did. I recorded the nodal displacements and they do not show the odd behavior. Any idea why the localDisplacements given by the bearing element don't match up with the displacements at its iNode and jNode? I accounted for the different orientation of the tw...

Well who knows why the display is so weird, but it seems that when you graph the displacements of the beam node and the slider node the weird displacement shown in the display is not really there. Not sure what to conclude. I will try using it against my data and see if anything reasonable comes out...

Here is a little model to demonstrate what I am talking about. Please download the ground motions used in the flat slider bearing element examples : http://opensees.berkeley.edu/wiki/index.php/Flat_Slider_Bearing_Element model BasicBuilder -ndm 2 -ndf 3 set gravity 9.81; set mass 10.e3; # Nodes node...

Hello, I am having a problem with the flat slider bearing element. I am trying to model a mass sliding along the beam of a moment frame: https://photos.google.com/search/_tra_/photo/AF1QipPQCjQLHptRqQ1dPD6KxAPC9dxK7eQA1vmZVE_G I have placed the slider element between the mid-node on the beam and the...

That is odd. I get zero axial in tension.

Hi. I am also using ENT for some uplift modelling, but I am not getting any tension participation from the element. Here is how I define the material: set E 200000; set matCompSupport 1; uniaxialMaterial ENT $matCompSupport $E; element zeroLength 1 1 2 -mat $matCompSupport -dir 1 -orient 0 1 0 -1 0 ...

That is the right geometric transformation.
How do you apply the "P" load? Are you using the loadConst command after applying the P load?

Have you looked at this example? http://opensees.berkeley.edu/wiki/index ... l_Building

Otherwise, post your script. It is hard to understand what is happening from your description.

Take a look at your nodes. The node 6 is unnecessary. Comment out this line and the code works fine. Otherwise you need to restrain it.

I have not used it myself, but I would interpret it that way ie. the displacement should be relative... but I would test it first!

Ah sorry. I read your post quickly. Look here.. she gives a quick description: http://opensees.berkeley.edu/community/ ... rce#p42683

and also here for a longer description : http://opensees.berkeley.edu/wiki/image ... EvsDBE.pdf

It is hard to explain this without a schema. Take a look at this: https://goo.gl/photos/NXLwGy7maGVX16Y7A

If your element's x-axis is parallel to the global x-axis then local and global displacements are the same, if not be careful that you know which one you are recording.