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Analytical Study on the Fire Resistance of Internally Confined Hollow CFT Column  

Won, Deok Hee (고려대학교 건축.사회환경공학과)
Han, Taek Hee (서울메트로 기술연구소)
Park, Jong Sup (상명대학교 토목환경공학부)
Kim, Young Jong (고려대학교 건축.사회환경공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.21, no.5, 2009 , pp. 461-470 More about this Journal
Abstract
A column resisting axial load and seismic load is one of the main members in a structural system. The heated column by event of a fire can lose its strength and it may damage its structural system or cause the collapse of the entire structural system. In this study, the fire resistance capacity of internally confined hollow concrete filled tube (ICH CFT) column was investigated. In an ICH CFT column, the yield strength of the external tube is important as a concrete filled tube (CFT) column because the external tube confines the filled concrete and the strength of the column depends on the confined effect. A study was performed by finite element analyses considering the confined effect and material nonlinearity as the temperature changes by the fire. The hollow ratio, the thickness of the external tube, and the strength of concrete were selected as the parameters for the analyses. The analyses were performed by using a commercial FEA program (ABAQUS) and nonlinear concrete model program. The analysis results showed that the hollow ratio and the strength of concrete mainly affect the fire resisting capacity of an ICH CFT column.
Keywords
fire resistance; hollow; external tube; internal tube; confined effect;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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