Experimental and theoretical studies have been carried out at the National Research Council of Canada to develop methods to predict the fire resistance of concrete filled hollow steel columns. A mathematical model that calculates temperatures, deformations and strength of columns in fire, and their fire resistance, is described in this paper. A comparison of results calculated using this model with the results of tests conducted on circular steel columns filled with non-reinforced concrete is discussed.
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Lie et al. (1990) studied this question.
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