A Hybrid Model of WTC Collapse

• Autorzy: Cherepanov G. P. , Esparragoza I. E.
• Języki publikacji: EN

Abstrakty

EN

A new theory of the WTC collapse is advanced that uses both fracture waves and progressive failure. According to the hybrid theory the WTC collapses ran in two phases: (i) in the first phase dynamic fracture waves disintegrated a considerable part of the towers producing the dust cloud and explosion sound well-documented and well-evidenced, and (ii) in the second phase the progressive failure front disintegrated the lower part of the towers that remained intact in the first phase. To illustrate many possible modes of progressive failure the slowest mode, the fastest mode, and three intermediate modes were first studied and then the hybrid mode was introduced. The hybrid theory allows one to get rid of evident defects of earlier theories and explain all basic facts and observations of the matter not understood before, in particular, why the time of all collapses was free fall time independent of the position of critical floor. An analysis and calculations given in the present paper do not depend on how fracture waves were produced.

Słowa kluczowe

EN

collapse; free fall; critical floor; fracture wave; progressive failure; hybrid mode

PL

model hybrydowy; katastrofa budowlana; budynek World Trade Center

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2008
• Tom: Vol. 13, no 2
• Strony: 575--585
• Opis fizyczny: Bibliogr. 3 poz., rys., tab.

Twórcy

autor

Cherepanov G. P.

autor

Esparragoza I. E.

• Honorary Life Member of the New York Academy of Science 6413 S.W. 113 Ave. Miami, FL 33173 USA,

Bibliografia

• Bazant Z.P. and Zhou Y. (2002): Why did world trade center collapse? - J. Engineering Mechanics, vol.128, No.1, pp.1-6.
• Bazant Z.P. and Verdure M. (2006): Mechanics of progressive collapse, Report No. 06-06/ c605T. - Dept. of Civil and Environmental Engineering, Northwestern University, Evanston, Illinois 60208, USA, pp.1-14.
• Cherepanov G.P. (2006): Mechanics of the WTC collapse. - Int. J. Fracture, vol.141, pp.287-289.