... | there are no objects that carry the load
This is de warning I'm getting. I think its saying that no elements intersect with the cladding, but the cladding goes through beams, floors and stands on top of a concrete wall.
I tried a correcting with the 'correct' function, but it didnt fix it.
How can I fix this?
(I feel like RSA is sometimes giving me warnings where there shouldnt be one!
Like the warnings 'no material' and 'isolated nodes'. Nodes that have a support are considered isolated??)
Try to generate calculation model first and then run verification.
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Roman Zhelezniak
Robot Evangelist & Passionate Civil Structural Engineer
AlexDT wrote:
... | there are no objects that carry the load
This is de warning I'm getting. I think its saying that no elements intersect with the cladding, but the cladding goes through beams, floors and stands on top of a concrete wall.
I tried a correcting with the 'correct' function, but it didnt fix it.
How can I fix this? (I feel like RSA is sometimes giving me warnings where there shouldnt be one!
Not being able to check your model I can't tell what is the reason for this warning. If you think it is excessive run model generation and then select the load in which you defined the cladding load. In the attributes dialog mark forces generated automatically and check how they were generated. If they seem to be correct calculate model and check sum of reactions comparing it to the value of load and area of the cladding.
Like the warnings 'no material' and 'isolated nodes'. Nodes that have a support are considered isolated??)
Again make sure that you run model generation before its verification. The supported node is reported as isolated when not attached to any part of the model.
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Thanks both!
Handy function Artur, I can now confirm how the claddingload is distributed! But the warning remains eventhough I see how it is and that it is distributed :S?
I dont know how to check the sum of reactions!!
(I will open a new thread on the isolated nodes)
I dont know how to check the sum of reactions!!
1. Create a separate load case for the cladding load you have issue with
2. Run calculations
3. Open table of reactions and filter it so that only this load case is displayed
4. Check sum of reactions
5. Calculate manually the total value of cladding load you applied
6. Compare values - if the load is correctly applied they should be equal.
If you find your post answered press the Accept as Solution button please. This will help other users to find solutions much faster. Thank you.
Thanks, I will do that now.
I started to fixing, but as I trying to fix problems the more problems I get 😞
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? Error: Bar length zero
? Error: The element is defined on a story different from the assigned one
? Warning: Faces (the objects without assigned thickness) not used solid area generation. FE mesh has not been generated
? Warning: Distorted element
? Warning: The load has not been distributed correctly | there are no objects that carry the load
Warning: Incoherent mesh on edges.
Warning: Cohesion of the calculation model has been provided by definition of the kinematic constraints in incoherent points of the finite elements mesh
Warning: The element is defined outside the stories
Warning: the element exceeds geometric limits of the story
Warning: The element is not assigned to any story
---------------------------
? Error: Bar length zero
? Error: The element is defined on a story different from the assigned one
? Warning: Distorted element
Warning: Incoherent mesh on edges.
Warning: Cohesion of the calculation model has been provided by definition of the kinematic constraints in incoherent points of the finite elements mesh
Warning: The element is defined outside the stories
Warning: the element exceeds geometric limits of the story
Warning: The element is not assigned to any story
tony
---------------------------
Thank you Tony for your valuable comments
Two tips that may help:
1. If your structure is regular try to define structural axes along the walls and at the levels of the floors and use Edit > Detailed Correct with adjusting to structural axes
2. In the meshing parameters go to the detailed options and switch off regular mesh.
These should solve some meshing problems for models with inaccurately defined geometry.
Goodmorning! (I live in the Netherlands 🙂 )
Thanks Tony. I will try your suggestions. I've deleted the stories as you say, so that should be that.
What do you guys recommend for model tolerance as I dont know what this function does exactly? I assume that the model tolerance controls which nodes to merge or something? I'd say 0.2mm instead of 0.1mm.
Ill get back at the other points in a sec.
Thanks Artur.
Yes the tolerance just shifts nodes / edges a little to get everything to meet properly. Just be careful, if you set the tolerance too low (say 10mm), entire beams / panels will visibly shift around. Then you will have bigger problems than you are currently getting.
I htink the calculate tolerance button is meant to give you an indication of the ideal tolerance.
1. Mark iterative adjustment of meshes
2. Change from Coons to Delaunay and switch off regular mesh
My understanding is that the primary source of your problems is the fact that the accuracy of the entered model geometry is not perfect therefore I'm suggesting the settings that use the meshing algorithm that is less vulnerable for such lack of accuracy of the model.
OK, understood. It's probably because I imported it from Revit.
Im still working on the given solutions.
See also:
http://forums.autodesk.com/t5/Autodesk-Robot-Structural/Meshing-into-robots-2012/td-p/3310651
Hi,
So many things have been going wrong :(. My model crashed 2 times and nothing was saved, so I had to redo everything for that day.
I couldnt check the total sum of the reaction resulting from the load on the cladding, so thats why I didnt answer. RSA kept crashing and say it was out of memory (1,5 out of 4 gb :S) and somethings had an "error nr. 5000".
After some adjustments I managed to get some results. The total sum of reactions was arround 80 kN but my total load on the cladding was 84,7 kN. I cannot explain this.
After all modifications the problem still stands. When I check load distribution regions I can see that the panel is not spreading his load as I want it to. I let all the connecting elements, that should not carry the claddings load, ignore "trapezoidal and triangular".
(I can edit the model more precisely now, but I get alot of strange things like panels(/walls/floors) not connecting nicely. All de panel coordinates are good, but the panel just dont fit onto eachother :S maybe its just a graphic problem?
I will start another thread on this problem!)
If the file keeps crashing maybe open in "repair mode"
Maybe put the file up here for bored people to have a look at
Tony
haha I dont think people ever get bored with RSA!
I did open it a couple of times in repair mode, not sure if there is some problem there.
Model:
http://wtrns.fr/451Sg95fjzaN6g (wetransfer.com)