I want to know how to calculate a beam on lateral buckling. Can someone help me with this? Are the calculations from Karamba based on the eurocodes with or without national annex? I am working with the FREE/TRIAL package from Karamba 3d.

Hello @1631349hunen,
the lateral buckling calculation is based on the EC3 (see here). It is crucial to set the lateral torsional buckling length correctly via the ModifyElement-component (see here).
– Clemens

Thank you very much for your reply. I have another question. We have learned that the bending moment around the Y axis is positive when counterclockwise and negative clockwise. Could it be the other way around in Karamba? That is how it looks on the moments line.

Hello Bas,
in Karamba3D a bending moment is positive when it causes a positive rotationincrement (according to the screwdriver rule) about the corresponding local beam axis. See here a cantilever beam under dead weight. The green arrow is the local Y-axis:

Ok that’s clear for me. Sorry but I have one more question. I want to place multiple point loads on this beam with 2 supports, but it only places them at the coordinates of the supports. If I add a coordinate on the line myself, it won’t work at all. Can you help me with this?

Hello @1631349hunen,
in Karamba3D 1.3.2. it is not yet possible to place point loads along beams. Thus one has to divide the line of the beam axis using e.g. Grasshopper’s Shatter-component to create interior nodes for placing point-loads.
– Clemens

Hello,
I also found a problem when calculating the deflection at two supports. The formula (5 * Q * L ^ 4) / (384 * E * I) is not used here, but which formula is?