Abstract
In the standard verification method for fire resistance of Building Standards Law of Japan, the temperature of fully developed fire is calculated by a simple analytical formula considering fire load density, constituent materials of the room and opening geometry. The calculation results are expressed by two parameters, fire temperature rise coefficient and fire duration. Even though the accuracy of fire temperature calculation is important for the fire resistance design of elements of construction, the accuracy of the calculation formula is not quantified yet. In this study, the accuracy of the calculation formula was analyzed by comparing with existing full-scale experiments. The errors in fire temperature rise coefficient and fire duration were quantified. As a result, it has been shown that the calculation formula tends to underestimate the fire temperature rise coefficient, while the fire duration is overestimated. In terms of equivalent fire duration, the formula seems to give slightly optimistic results in average but with considerable scatter.
