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An Evaluation for the Fire Resistance of Concrete-Filled Steel Square Tube Columns under Constant Axial Loads  

Park, Su Hee (서울시립대학교 건축공학과)
Ryoo, Jae Yong (서울시립대학교 건축공학과)
Chung, Kyung Soo (포항산업과학연구원 강구조연구소)
Choi, Sung Mo (서울시립대학교 건축공학과)
Publication Information
Journal of Korean Society of Steel Construction / v.19, no.6, 2007 , pp. 703-714 More about this Journal
Abstract
The aim of this research is to evaluate the fire resistance of concrete-filled steel square tube columns (square CFT columns) under constant axial loads by numerical analysis. The authors examined the experimental results on the fire resistance of concrete-filled steel square tube columns without fire protection. As the materials of CFT columns, steel of SPSR 400 grade and concrete of 27.5MPa and 37.8MPa strengths were used. The significant parameters were determined, such as load ratio, cross-sectional dimensions, and concrete strength. Detailed analytical simulations of fire resistance and axial deformation showed good agreement with the experimental observations. Therefore, this numerical analysis exhibited a reasonable estimation of fire resistance of the square CFT column. Results of the numerical parametric studies showed that the fire resistance of the CFT columns increased with the decrease of the concrete strength and the increase of the cross-sectional dimensions about the constant axial load ratio ($N/N_c$).
Keywords
Concrete-Filled Steel Tube Column(CFT); Fire Resistance; Constant Axial Load; High Tem perature;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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