North Tower Acceleration

[Bolo Boffin]

80. This resistance of yours to simple requests is strange.

I've asked twice now for evidence of your assertion that independent analyses from both sides of the discussion have discredited Bazant Zhou. You've provided none. This is my third request, and if you ignore it again, I'll take from that you have no actual independent analyses from my side of the discussion and you're just asserting a falsehood.

You've also been asked for a properly labeled free body diagram, which would even help your attempt to explain to all of us "so-called skeptics" just what you mean in your description of the physics of this fall. And yet you will not do that either. I don't understand why you resist putting numbers and labels to a free body diagram.

Please provide your evidence for your "both sides discredit Bazant" assertion and a properly labeled free body diagram, if only to facilitate the discussion.

I think I've explained my objection to your theory about this pretty well. The upper section is falling, but is only accelerating at 70% of freefall. Since gravity is the only factor in this collapse and it's a constant, a large chunk of energy is being siphoned off to do something. You now say that this diverted energy is not enough to account for "energy absorption by the columns, column deformation, pulverization of the concrete and other building contents". Your calculations on that, please? And you are taking into account the fact that the upper sections in both buildings have twisted and are not hitting the structure below dead on? Pushing columns away is a lot less energy consuming than forcing them to buckle.