DEVELOPMENTS OF FIRE RESISTANT DESIGN FOR STEEL STRUCTURES BASED ON RELIABILITY THEORY

− PROPOSALS OF LIMIT STATE DESIGN METHOD USING STEEL MEMBER AND COLLAPSE TEMPERATURE FACTORS −

Abstract

The main purpose of this study is to develop fire resistant design based onreliability theory for a protected steel member at fully-developed compartment fire. The probability density function of the collapse temperature was approximated by using a shifted lognormal distribution. Novel fire resistance design using both steel member temperature and collapse temperature factors was proposed. Designers and engineers can design the mean value of the maximum steel member temperature, or that of the collapse temperature corresponding to the target reliability index.