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Originally posted by SilentBob86
Well...i believe the designer of the world trade center towers said it all in. i believe,k it was a discovery channel show and he talked about how he had designed the building to be able to handle the impact of a plane bigger than the ones that struck the towers. Now i am no structual engineer, but im pretty sure that he and his collegues would definately not have made those claims if they did not have some solid proof to back it up. being as it was the tallest two builidngs at the time of the construction...i also dont believe that some 2-bit fresh out of itt tech dude would be contracted to design such a set of towers. But, thats just my .02 on the matter...and im pretty sure the main designer, had he still been alive, would of prolly had something to say about the whole thing...who knows, maybe he was "removed" for a purpose....
Originally posted by robert z
I would guess that if the physical models showed a collapse you would be the first to say that it is impossible to model the actual WTC buildings.
This is why I put little stock in the physical models. Trying to re-create the actual buildings and damage is a bit of a stretch.
Originally posted by seanm
Calculate the kinetic energy of each block and report back
You might want to read what I actually wrote. Could I be any more clear? And where did I say "free fall"?
Try again.
Originally posted by seanm
You might want to read what I actually wrote. Could I be any more clear? And where did I say "free fall"?
Try again.
Originally posted by seanm
Indeed. Someone with your claimed background who is unable to calculate the kinetic energy of two masses, one 40,000 tons, the other 110,000 tons, falling 6 feet onto a structure never designed to take those loads must be much more than in awe.
Amazing.
Originally posted by snoopy
So Griff, why don't you jsut dispell it by creating a computer model that calculates every possible variable in the collapse of a 110 story building? Should be easy right since you're up against such idiocy, what's the problem? I mean since NIST and it's 100s of engineers are not competent as you guys, why don't you just do the work and prove everyone wrong?
Surely the collective genius at ae911.org should be able to easily do it right? Since it's so absurd to even think it's not possible. Why aren't any of you guys working on this easy task?
Originally posted by seanm
Yawn.... The actual towers collapsed. Get over it.
Originally posted by jfj123
Cost cuts impact everything and in addition, builders cut corners to make more money all the time. I see this happen every day so I know it happens. Many modern buildings aren't completely up to code at time of completion.
Originally posted by sp00n1
Yea, a supercomputer used to model planetary collisions doesn't have the power to model a collapse... what?!?!
Dynamic buckling
If the load on the column is applied suddenly and then released, the column can sustain a load much higher than its static (slowly applied) buckling load. This can happen in a long, unsupported column (rod) used as a drop hammer. The duration of compression at the impact end is the time required for a stress wave to travel up the rod to the other (free) end and back down as a relief wave. Maximum buckling occurs near the impact end at a wavelength much shorter than the length of the rod, at a stress many times the buckling stress if the rod were a statically-loaded column. The critical condition for buckling amplitude to remain less than about 25 times the effective rod straightness imperfection at the buckle wavelength is
σL = ρc2h
where σ is the impact stress, L is the length of the rod, c is the elastic wave speed, and h is the smaller lateral dimension of a rectangular rod. Because the buckle wavelength depends only on σ and h, this same formula holds for thin cylindrical shells of thickness h.
Source: Lindberg, H. E., and Florence, A. L., Dynamic Pulse Buckling, Martinus Nijhoff Publishers, 1987, pp. 11-56, 297-298.
Originally posted by six
reply to post by sp00n1
Why yes I did. Twice before posting and once to reread it before I posted now. Maybe you should read your own post. Nowhere in your post did you ever state ANYTHING about physical modeling. NOWHERE.
Originally posted by snoopy
That's not really true at all spoon, you're simply over exhagerating the situation.
Originally posted by snoopy
Liekwise there are far too many variables in the entire building collapse for any existing computer to be able to calculate.
And more importantly, people such as yourself are ignoring everything BUT the computer testing.
Originally posted by sp00n1
No! For the millionth and ten time, PHYSICAL MODELS!! PHYSICAL MODELS!!! PHYSICAL MODELS!!!!!!!