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- W261003969 abstract "The strength of steel in a concrete filled steel tube (CFT) is reduced in a fire, but the concrete filled structurally ensures the fire resistance due to its high thermal capacity. This research analyzed the fire resistance performance due to the variances of concrete strength filled inside of steel tube and the load ratios, which can influence on the fire resistance of CFT. As CFT columns with the concrete strengths of 24 MPa and 40 MPa and the axial load ratios of 0.9, 0.6, and 0.2 in accordance with KS F 2257-1 and 7 were heated with loading to examine the fire resistance performance, the fire resistance used to 24 MPa concrete showed 27, 113, and 180 minutes according to the axial load ratios, 0.9, 0.6, and 0.2 respectively. In case of 40 MPa concrete, the fire resistance were turned out to be 19 and 28 minutes for the axial load ratios, 0.9 and 0.6 respectively. The results of fire resistance with 40 MPa concrete showed the much lower fire resistance performance than those of 24 MPa concrete. In case of 40 MPa, the fire resistance performance was not increased significantly according to the axial load ratio than that of 24 MPa. The main reason why the higher concrete strength showed lower fire resistance than that of lower guessed the internal stress had the concrete strength weak." @default.
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- W261003969 date "2010-12-31" @default.
- W261003969 modified "2023-09-23" @default.
- W261003969 title "Experimental Study on Fire Resistance Performance of CFT (Concrete filled Tube) Column according to Cross Section of Steel, Concrete Compressive Strengths and Load Ratios" @default.
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