bazant zhou collapse

Many persons take for granted that steel structures of certain types, e.g. WTC Twin Towers, collapse from top down - one-way crush down - if you start a fire up top. The fire is supposed to weaken support steel structure up top and then the structure above displaces down and one-way crushes the...

I have performed a small series of experiments and interpreted them to lessen the likelihood that a collapse of the WTC North Tower, once underway,would inevitably progress, as handed down by Bazant et. al. and embraced in the 2005 NIST report. I challenge the physics and/or engineering...