…Here, let me read out p484 NCSTAR 1-9 for ya:
"Displacement Boundary Conditions
The column nodes at the base of the 16 story model were fully fixed to model the rigidity of the grillage and foundation (Chapter 2). The top of the columns at Floor 16 were fixed in the global x- and ydirections, to prevent lateral displacements, and were free in the global z-direction, to allow vertical displacement of the columns in response to gravity loads and thermal expansion. The purpose of the ANSYS model was to simulate the accumulation of local damages and failures up to the initiation of overall global collapse due to fire. The building was not expected to displace significantly in the x- and y-directions outside of the floors with no fire and there was no interaction between adjacent columns for relatively small motions in the z-direction, due to limited load re-distribution mechanisms."
No other Displacement Boundary Conditions are mentioned, and since they explicitly state those for the bottom and the top of the 16-story assembly, I am sure you will agree with what I implied initially: the 16-story FEA model DOES reflect the deformations and displacements in all directions that reality necessarily must have seen - on all floors except the very top and the very bottom. It would help your credibility to admit that the model does indeed reflect movement of all nodes on all the relevant floors (5-13 at least) in all spatial directions. If you go on denying or ignoring this FACT, this would serve to further undermine your credibility.