Fundamental study on performance of steel bridges under fire

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This study focuses on steel bridges that are not required to have fire resistance and aims to investigate structural performance of steel bridges exposed to fire. In the first year, information on actual fire events that damaged steel bridges in the past, and size and temperature of fire caused by a gasoline tanker truck accident was estimated by a hand calculation. As a result, steel bridges may be subjected to fire whose temperature can be over 1000℃ for more than 1 hour. In the second year, by conducting tensile coupon tests at elevated temperature on recently developed bridge high performance steels, their mechanical properties at elevated temperature were examined in comparison to conventional structural steels.