20-07-2013, 01:52 AM
Lauren Johnson Wrote:This is a technical paper refuting the Progressive Column Failure theory of North Tower Collapse from the International Journal of Protective Structures. A couple of key paragraphs:
Quote:This presentation is not so much about how the WTC towers failed, but about how they could
not fail. The objective is to eliminate erroneous concepts supported by false assumptions and
by the use of incorrect values for velocity, mass, and column resistance. The only complete
hypothesis of the global collapse mechanism of the Towers is a successive flattening of
stories associated with compressive column failure and referred to as a Progressive Column
Failure mode or PCF in brief. (In the past this mode was often referred to as pancaking, but
this term is not used here to avoid ambiguities). It is explained here why PCF could not be
the mode of the ultimate destruction....
As one can readily see, this mode of damage is a distinct process, whereby each floor
becomes crushed, one after the other. An attempt has been made to smear the process out into
a continuum event and then use differential equations to obtain a solution [2]. Yet,
....
This is Szamboti's paper and it's been pretty much debunked. It's a long "debate" but the proof is in the tasting:
http://forums.randi.org/showthread.php?t=261678
You can fool some of the people some of the time
bit you can't fool all the people all of the time
Make up your own mind after you've availed yourself of the facts.