True? Posted on January 17, 2021 by Joe Via email from Rolf: Did the Czechs really build both structures? Like this:Like Loading... Related Share
Presume it’s true.
Why does it matter?
The Real Kurt
Because it’s funny. Humor based in reality is better than just random words and juxtapositions.
Pointing out that the pyramids are 5K years old, and as proof of their great strength they are between the Libyans and Sudan, people would be like “….. yeah, and yer point?…..”
Or one could point out that a people of very great vanity once lived there? Which is the true wonder of the seven wonders?
That’s kind of funny.
No mystery in concrete and rebar. Most structures are made for humans. As such, they will max-out internal space with just enough external structure to hold the building up. Plus safety factors.
A grain silo on the other hand is built to not only hold itself up, but designed with internal pressure as a factor in wall perimeters. More concrete, more rebar. Different shape.
Notice that? Both structures are not only concrete and rebar. But are round in shape. Force striking a rounded surface deflects at a 90 degree angle. (I believe it’s called the magnus effect.) Thus a pressure wave of say 10 PSI. Against a flat surface, one could just add up all the square inches of an effected area. Multiple by 10, and compare it to The design spec.
With a rounded surface the pressure wave deflection acts as a blocking action to the rest of the surface that would normally be part of the equation.
Thus rounded structures hold up better in heavy winds than flat ones. Which is best way to look at external explosions. Heavy winds.
If it’s Czech design/build? Can’t say. But neither building was actually designed to survive an explosions they did.
Which begs the question. Rolf, What’s?
I think your last question might need to be edited.
Yes, I’m still expecting Trump to be in office for another 4 years.
Ah – I missed the amusement. Color me tired last night…
The Real Kurt
The Hiroshima structure was ground zero, several hundred feet directly underneath the nuke. The roof and floors were blasted straight down into the lowest levels and any medium or light cladding was stripped off, but the main concrete pillars took a hit only on their top ends. Of course they survived these compressive forces. It’s a little more surprising that the framework for the dome and the main concrete horizontals are still there. Everything they supported went quickly, and then they only had to handle edge-on forces, but that’s still quite strong construction.