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Title |
A Evaluation on the Field Application of High Strength Concrete for CFT Column
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Authors |
박제영(Je Young Park) ; 정경수(Kyung Soo Chung) ; 김우재(Woo Jae Kim) ; 이종인(Jong In Lee) ; 김용민(Yong Min Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2014.26.6.707 |
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Keywords |
콘크리트 충전강관(CFT) ; 고강도 콘크리트 ; 장기거동 ; Concrete Filled steel Tube (CFT) ; high strength concrete ; long-term behavior prediction |
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Abstract |
CFT (Concrete-Filled Tube) is a type of steel column comprised of steel tube and concrete. Steel tube holds concrete and the concrete inside tube takes charge of compressive load. This study presents structural performance of the CFT column which has 73~100 MPa high strength concrete inside. Fluidity, mechanical compression, pump pressure test in flexible pipe were conducted for understanding properties of the high strength concrete. Material properties were achieved by various experimental tests, such as slump, slump flow, air content, U-box, O-Lot, L-flow. In addition, mock-up tests were conducted to monitor concrete filling, hydration heat, compressive strength. From construction sites in Sang-am dong and University of Seo-kang, long-term behaviors could be effectively predicted in terms of ACI 209 material model considering elastic deformation, shrinkage and creep.
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