Response to Fire Exposure of the Pentagon Structural Elements

August 30, 2005
Publication: Journal of Performance of Constructed Facilities - ASCE v 19 n 3 p 212-219
Author(s): Donald Dusenberry Mlakar, P.F. Harris, J.R. Haynes G.A. Phan, L.T. Sozen, M.A.

Abstract: An overview of fire damage sustained by the Pentagon structural elements in the September 11, 2001, terrorist attack is provided. The fire intensity in some compartments of the affected areas inside the Pentagon was approximated to be between those of the two standard fire exposures ASTM E119 and E1529, based on the observed fire damage and estimated fuel load. Thermal analyses of the structural columns and beams were performed using the standard fire exposures to demonstrate the increased vulnerability of these structural elements once the concrete cover was lost.

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