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Title |
Parametric Study on design Variables of Rectangular Concrete Filled Tubular Columns with High-Strength Steel
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Authors |
최현기(Hyun-Ki Choi) ; 배백일(Baek-Il Bae) ; 최윤철(Yun-Cheol Choi) ; 최창식(Chang-Sik Choi) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2015.19.2.010 |
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Keywords |
콘크리트 충전 강관 기둥 ; 고강도 강재 ; HSB800 ; 좌굴 ; 세장비 ; 유한요소해석 Concrete filled tubular column ; High strength steel ; HSB800 ; Buckling ; Slenderness ratio ; Finite element analysis |
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Abstract |
For the safe design of steel-concrete composite structure, usable yield strength of steels are limited in most of design standard. However, this limitation sometimes cause the uneconomical design for some kind of members such as slender columns which was affected by elastic buckling load. For the economical design for slender columns, parametric study of RCFT (Rectangular CFT) with high-strength steel is conducted, especially investigating the limitation of yield strength of high-strength steels. Using ABAQUS, finite element analysis program, the finite element model was constructed and calibrated with experimental study for RCFT with high strength steel which have yield strength up to 680MPa. Investigated design parameters are yield strength of steel, compressive strength of concrete, steel thickness and slenderness ratio. The effect of desgn parameters were compared with design standard, KBC-09. From the parametric study with 54 models and previous test specimens, RCFT can be safely design with higher yield strength of steels than currently limited by KBC for large range of slenderness ratio.
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