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Mattia
il 2018-09-05 02:32:31.0 alle 2018-09-05 02:32:31.0
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Simulazione del crollo delle torri gemelle
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L'autore della simulazione ha messo delle FAQ interessanti nella descrizione.


Q: Is the core missing in your model?
A: No, it's just hardly visible because of the low camera angle.

Q: Why did the tower not tip over?
A: If one part of the supporting structure fails then a progressive process starts which makes neighbor supports failing as well due to increased load they have to bear and so on. This happens within seconds so that the building has literally no time to tip over. The larger a building the more immovable is it due to inertia.

Q: But I saw lots of demolition videos where high buildings tipped over, what now?
A: Reinforced concrete buildings with solid load bearing walls are not comparable to lightweight steel structures like the Twin Towers were. Also most certainly none of them were even half as high.

Q: The debris obviously didn't choose the way of least resistance by falling through the still intact structure, how is this even possible?
A: With the debris mass accumulating and accelerating over time also the momentum increases. It increases much faster than the resistance of the still intact structure could slow it down. In this case also the energy required to redirect the momentum to a path of less resistance would be much greater than keeping the original motion path throughout the intact structure. So it depends on the direction of momentum if the path of least resistance would actually be the most energy efficient way to go.

Q: What about Newton's third law? The collapse doesn't match up with my school physics calculations.
A: Classical Mechanics describes the behavior of idealized non-deforming objects, but steel isn't. In fact no known material in the universe is. You cannot reduce complex problems to simple formulas without iterative process, that's why we use computer simulations to understand the behavior of building collapses.

**Modificato dall'autore il 05.09.2018 02:34**

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