Fire-resistant structure : The concrete filled steel tubular column

The concrete filled steel tubular column for supporting a furnace at one glass factory has been firstly used in the world, with a total number of 70 columns in four rows. Hundreds of tons of high-temperature molten glass leaked out onto the ground at the bottom of the furnace columns and caused the fire. These columns had not miraculously been burnt away in the fire and had still effectively supported the furnace weight . This paper presents the fire situation, structure damaged status and mending work, and evaluates the fire-resistant characteristics of these columns.