I have an assembly where I am modeling an anchor from a structure into concrete with a beam element and conducting a modal analysis. The end of the beam in the concrete is constraint in all 6 DOF and the other end is connected to the structure via a weighted link. The base of the structure is contratined to prevent vertical translation (y). The net result of all of this should be a fixed end-guided end beam condition (shown below).
However, when I look at a deformed plot of my model, it looks like the "fixed end" is allowing rotation. The beam is not going through a "S" shape deformation and it looks as if there is rotation on the fixed end. The constrains on the top is defined on the surface of shell elements.
I have comfirmed that there are not any beam releases defined.
Any thoughts?