Material effect for predicting the fire resistance of concrete-filled square steel tube column under constant axial load |
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Authors: | Kyungsoo Chung Sungmo Choi |
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Affiliation: | a Research Institute of Industrial Science & Technology, 79-5, Youngcheon, Dongtan, Hwasung, Kyonggi-do 445-813, Republic of Korea b University of Seoul, 90 Cheonnong-dong, Tongdaemun-ku, Seoul 130-743, Republic of Korea |
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Abstract: | This paper presents a critical review of the performance of the currently available material models with regard to the mechanical behaviour of a concrete-filled steel tube (CFT) column at elevated temperatures. For this purpose, numerical heat transfer analysis and nonlinear thermal stress analysis were carried out by taking into account the existing material properties, such as the thermal and mechanical properties of concrete and steel. In addition, ten CFT column specimens with rectangular cross-sections of 300-350 mm in size were heated for two hours in accordance with KSF 2257 (equivalent to ASTM E119 and JIS A 1304). On comparing the numerical analysis and experimental results, it can be observed that we can validate and employ the existing material models such as EUROCODE, AIJ CODE, Lie’s material model, and Yin’s material model. |
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Keywords: | Fire resistance Concrete-filled square steel tube column Material effect High temperature |
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