I want to compare the differences in buckling behavior between modeling a lattice tower either as beams (3 rotational + 3 translational DoFs) or as trusses (3 translational DoFs): BeamTrussHinges.gh (84.6 KB).
However, I obtain much lower buckling factors using beam elements (4.28) than using truss elements (13.93). Even lower buckling factors are obtained (1.68) in case hinges are introduced at each nodal position of the beams (Joint-Agent component). This is quite counter intuitive, isn´t it?
Please, would you help me? Thanks!!!
PS: The “Rx” radio-button in Joint-Agent must be unchecked, otherwise negative or close to zero modes are obtained…
PPS: Using Karamba3D 1.3.2 - build 200205 for RHINO 6