강구조 부재의 하중비에 따른 내화성능 평가 연구

초록

Structural steels have been used as a major constructional materials to satisfy the needs toward a higher, longer building. But the evaluation of fire resistance for structural steel elements depend on fire tests with fire furnace. In real situation, the structural steel elements such as columns and beams are carried design forces, axial forces and moments, respectively. But when the fire resistance was evaluated through fire tests, no takes account of the loading amounts usually. To make a general rule for an evaluation procedure of fire resistance for structural steel elements when exposed to fire, the limit temperature of those is needed and it is very importance to assure that the fire resistance mainly depends on the loading amount for each structural element. To prepare the basic data for limit temperatures of structural elements, steel columns made of circular, rectangular steel tube were used and H sections are used as a beam. The loading ratios for axial force and moment were 100%, 80%, 60% and 50%. The results of fire tests with load were shown that the fire resistance relied on the magnitude of loading and the limit temperatures were lower when the higher loading was applied than the lower loading done.

키워드