Theoretical study of the effect of coatings on concrete members under fire


Procedures are given to calculate the loadbearing capacity of reinforced concrete beams and columns, with and without rendering, whilst exposed to fire. The temperature within the building is calculated from a knowledge of its dimensions, and the mass and calorific value of the combustible material. A procedure is given to calculate the temperature distributions within the concrete structure as a function of time, and a constitutive equation to determine its strength as a function of temperature. Further equations are provided to calculate the stress-strain relationship of steel at temperatures up to 700 C. These relationships enable the calculation of loadbearing capacity as functions of time and temperature. 9 refs.

Primary author(s): Zhou X;Zhang J

Source: Mag.Concr.Res.

             Vol.55, No.2, April 2003, p.143-149


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