Civil Engineers at University of Alaska Fairbanks – Fire Did Not Bring Down WTC7

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    • #96820

      After 2 years of research that culminated with the $300,000 finite element analysis of the WTC7 tower collapse on 9/11, Civil Engineering Department at the University of Alaska Fairbanks has concluded fire did not bring down WTC7.

      Source: http://ine.uaf.edu/projects/wtc7/

      The research team studied the building’s response using two finite element programs, ABAQUS and SAP2000 version 18. At the micro level, three types of evaluations were performed. In plan-view, the research team evaluated: 1) the planar response of the structural elements to the fire(s) using wire elements; 2) the building’s response using the NIST’s approach with solid elements; and 3) the validity of NIST’s findings using solid elements. At the macro-level, progressive collapse, i.e., the structural system’s response to local failures, is being studied using SAP2000 with wire elements, as well as with ABAQUS, and it is near completion. The findings thus far are that fire did not bring down this building. Building failure simulations show that, to match observation, the entire inner core of this building failed nearly simultaneously.

      Progress report: http://ine.uaf.edu/media/92216/wtc7-structural-reevaluation_progress-report_2017-9-7.pdf

    • #96821
      Lord Wankdust
      Participant

      It sure didn’t.

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