Beam check/ Lateral restrain
Hi @simjack
I wanted to ask if there is a simple way to laterally restrain beams. At the moment I just applied restrains at every 0.05L however I am not sure whether that is the right procedure.
This will work but you can also do this like that:
In the attached model, I am only interested in the lower level portal frame. I performed a simple check to see whether the load is being distributed correctly. I applied a permanent load 2kN/m2 on the first floor slab and calculated a deflection for the middle beam (10) to be 16.5mm (5x(2x4.3)x7160^4)/(384x210000x8500x10^4). I understand it's two point loads rather than UDL however the difference is so large. Can you please advise why can this be?
IMHO you disregarded the fact that part of the load is taken by both the slab and perpendicular beams as they have their stiffness too.
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Artur Kosakowski
Hi @simjack
Are you implying that in the model the stiffness of the slab gives it the ability to spans between outer beams?
If you define it at the beam lecvel and mesh then it is what actually happens.
In reality the slab would be supported on the intermediate beams with simple pin connections so the vertical load should be taken by the beam 10 and the corresponding perpendicular beams. Is there a way how to correct this?
Assuming you don't need to check the results for the slab itself you can do it in this way:
Otherwise mesh the panel but define it above the beams and connect it with the beams with short bar elements (pins).
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Artur Kosakowski
