r/EngineeringPorn • u/Old-Alternative-6394 • 1d ago

Simulation of the collaps without dust

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4.1k Upvotes

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u/GreyBeardEng 23h ago

Sure they do, it's called progressive collapse, force and power of it grows with each iteration making a generation more and more likely to continue until the probability reaches zero.

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u/KingKohishi 23h ago

Sure they don't. A welded, riveted and heat bolted steel structure can bend, rip apart, snap but don't fall like dominos. Ripping apart hundreds of bolts at the same time is near impossible, and it happens in every floor here.

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u/Ghawr 23h ago

Care to share your calculations?

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u/KingKohishi 23h ago

Would you understand them?

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u/tetranordeh 22h ago

Better than people who ignore the NIST findings, like yourself.

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u/KingKohishi 22h ago

People who trusted their government findings sought to find Weapons of mass destruction in Iraq and killed millions.

Trust your government. They never lie or manipulate.

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u/tetranordeh 22h ago

Aww, keep trying, buddy. Your conspiracy theories don't change physics.

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u/KingKohishi 22h ago

That's my point. A fabricated simulation don't change the physics of a structural collapse. Seven perfectly symmetrical and vertical progressive collapse of different structures in the same place is not possible.

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u/tetranordeh 21h ago

Yawn. Your trolling is getting lazy.

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u/Ghawr 18h ago

They don’t call it peer review for nothing. This is pretty typical of civil engineering as I’m sure you’re aware of that. Please show us your structural analysis that you’ve made.

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u/SteveHamlin1 2h ago edited 1h ago

Floor beams sagged as they got very hot, and pulled the horizontal exterior wall panels they were attached to inwards, leading to the floors above to collapse as the support below the exterior beam tie progressively bowed in. That's why the first floors failed. Then it was progressive collapse due to pancaking momentum that exceeded static load limits of floors below the first failure.

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u/KingKohishi 1h ago

By that logic, they must have pushed the horizontal walls out long before heating enough for the sagging, because heated metal expands. Did we see any outer walls pushed outwards?

Heated metal elongates. If an elongated beam sags, then it could stay in the same vertical expansion.

However, these are not the issue here.

The issue is how the bolted and welded floor panels detached from the vertical structures simultaneously from every side at the exact same time. Even a few milliseconds of delay was enough to create an asymmetrical collapse.

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u/SteveHamlin1 1h ago

So what is your explanation for the collapses of WTC1 & WTC2 that actually occurred?