Document Type thesis Author Name LaMalva, Kevin Joseph URN etd-042907-214619 Title Failure Analysis of the World Trade Center 5 Building Degree MS Department Fire Protection Engineering Advisors Jonathan R. Barnett, Advisor Donald O. Dusenberry, Co-Advisor Keywords structural collapse WTC 5 World Trade Center 5 structural fire protection Gerber beam design progressive collapse shear connections thermal-stress analysis steel construction Date of Presentation/Defense 2007-05-01 Availability unrestricted
This project involves a failure analysis of the internal structural collapse that occurred in World Trade Center 5 (WTC 5) due to fire exposure alone on September 11, 2001. It is hypothesized that the steel column-tree assembly failed during the heating phase of the fire. The results of this research have serious and far-reaching implications, for this method of construction is utilized in approximately 20,000 existing buildings and continues to be very popular. Catastrophic failure during the heating phase of a fire would endanger the lives of firefighters and building occupants undergoing extended egress times (e.g., high-rise buildings), or relying upon defend-in-place strategies (e.g., hospitals). Computer software was used to reconstruct the fire event and predict the structural performance of the assembly when exposed to the fire. Results from a finite element, thermal-stress model confirms this hypothesis, for it is concluded that the catastrophic, progressive structural collapse occurred approximately 2 hours into the fire exposure.
Files Addendum.pdf LaMalva.pdf
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