I want to model this 25 bar truss benchmark. the schematic of the benchmark, the loading conditions and my partial tcl file are attached.
How can I define this kind of loading in my code? Because there are multiple loading on nodes 1 and 2.
is it possible with multiple pattern plains? if yes how can i link them to analyze simultaneously.
I tried to model it as it's shown in the tcl file, but it doesn't work, since the maximum deflection in the nodes should be lower than 0.35 inch.
Any help would be appreciated, thanks in advance.
source of pictures : http://ethesys.lib.ttu.edu.tw/ETD-db/ETD-search/getfile?URN=etd-0813110-182801&filename=etd-0813110-182801.pdf
Hirad I found what your were meaning yesterday.
1- based on elementary statics, it is possible to add each component of a force vector to the corresponding component of another force vector acting on the same node.
2- due to this fact, I think the loading is two different loads and are not applied simultaneously. otherwise, the resultant force would have been specified.
3- However, if you want to apply two different loads simultaneously on one node, it is possible to define several load pattern using "Pattern Plain ..." command in OpenSees.
Thank you so much Mohammad, but How can I define the parts of analyze and time steps? Would you mind taking a look at the tcl file which I attached in the original post.
My final goal is to consider the 25 bar truss under this loading condition which consists of 6 force vectors. four vectors on node 1,2 and two vectors on node 3,6.
Thanks so much in advance.
Hirad, look at this one. You will like it :D
There were some problems with defining your three-dimensional model [Applying nodal loads, fixing some required dofs, etc.]
Furthermore, I have added a graphical view which might be interesting :D
Check it and tell me if there is any problem
Hi Ali, it is modeled by Opensees commands in tcl language. The tcl file is attached to the main question if it helps.