Abstract
Strength properties of structural steel are reduced when exposed to fire above temperature 600°C. A widely used general rule is that if the steel members in the building frame are reasonably straight with no visible distortion after a fire event, it can be reused. If these members are accepted for reuse with minor or no repairs, then the performance of steel members with a high-temperature fire exposure under a future earthquake event should be known. This study investigated the cyclic response of fire exposed steel Welded Unreinforced Flange Web (WUF-W) and Reduced Beam Section (RBS) welded connections. The results showed that fire exposed steel connections are vulnerable to earthquake loading if they are reused with minor or no repairs. When the performance of connections was compared, it was understood that the usage of RBS connection provides high safety, whereas WUF-W connection has the high moment capacity and energy dissipation capacity.
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