[Fallen Angel]

Oorspronkelijk geplaatst door Bertie

Waarom een olievat? Waarom niet een konijnenkot?

Can a jet fuel/hydrocarbon fire collapse a steel structure? An experiment.

I set up the following experiment using steel rabbit fencing as the steel structure supporting a heavy cement block.

Note, this fencing is easily bendable, has no significant rigidity, and was not reinforced in any way. The fencing was bent into an outer square and an inner rectangle (the core):


Then I damaged the "columns" by cutting them with wire cutters:


Just inside where the gash was made in the outer wall, I placed a cup of kerosene (jet fuel), and there was newspaper around the bottom on the structure.

Then I put a heavy cement block on top, weighing about 15 pounds. I don't think the wire structure would hold more than three of these blocks, so the "safety factor" was not particularly high.


Then I tipped over the cup and lit the kerosene:


Then fire burned for about twenty minutes, and toward the end, I put my foot on the structure to see if it would extra weight. It still did:


The structure held up fine after the fire died:


After the fire was hot, the "columns" were not hot at all:

bron

Dat is de reden waarom men brandproeven nooit op schaal doet.

Wanneer een lengte verdubbelt wordt de oppervlakte 4 keer groter en het volume/massa 8 keer groter.

Daarom ook dat wij nooit bouwelement op schaal testen. Altijd op schaal 1:1.