View Generic Document: Evaluating the Fire Resistance of Structural Steels
Citation:
Bykowski, Mikolaj (2005). Evaluating the Fire Resistance of Structural Steels. National Institute of Standards and Technology, Technology Administration, U.S. Department of Commerce..
This presentation will focus on the mechanical creep-ramp testing of standard and fire resistant construction steels and begin with the importance of being able to predict
accurately the performance of steel in a real fire. A test similar to the mechanical tensile test was performed on various steel specimens, with the addition of a constant rate heating applied to
the samples. This approach was intended to simulate the natural fire curve that occurs in building fires to better predict the behavior of specific structural members as opposed to the behavior of
the entire structure. Various ramp rates were tested and comparison graphs were produced to observe trends in behavior. The failure criteria were characterized by a critical temperature, at which
run-away strain occurred. The ultimate goal of this research is to be able to predict, based on the testing conditions, the fire resistance of steels. The microstructures of the samples before and
after testing were also probed to discover any clues of predicting behavior under loading. An oxide layer formed in the tested samples due to the exposure to extreme heat. That oxide seemingly
penetrated into the bulk of the sample along grain boundaries, which could indicate significant flaws in the material.
Publisher
National Institute of Standards and Technology, Technology Administration, U.S. Department of Commerce.
Guest - January 07, 2009
View Generic Document: Evaluating the Fire Resistance of Structural Steels 