I have a hard time following you. The vertical structural elements are columns, the horizontal structural elements (floors) are beams. These are different structures. Penetration relates to momentum and the wings would have had less momentum per unit area than the fuselage and engines, so they would not penetrate very far. You haven't seen aircraft primary structure (wing beams & decks). Very robust. The building outer wall was mostly window, so there was no possibility that a Warner Brothers effect would have occurred. Too much smashed glass. I think you are trying to refer to "kinetic" energy.

It is a common mistake to think that the terminal effects of a collision or a bullet wound are proportional to kinetic energy, but they are more in proportion with momentum. What is left out of consideration is that a lot of the kinetic energy is converted into thermal energy of material deformation of the penetrator. When my Dad went deer hunting, if they bagged a deer, they would cut out the bullet and drop it in a bucket of water to cool down. The wounding deformation of the lead and copper made it hot to the touch.