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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Steel and Composite Structures, An International Journal Steel and Composite Structures, An International Journal Vol.39 No.1
- 발행연도
- 2021.1
- 수록면
- 21 - 33 (13page)
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This paper aims to improve the current state-of-the-art in long-term deflection prediction in steel-concrete composite beams. The efficiency of a time-dependent finite element model based on linear creep theory is verified with available experimental data. A parametric numerical study is then carried out, which focuses on the effects of concrete creep and/or shrinkage, ultimate shrinkage strain and reinforcing bars in the slab. The study shows that the long-term deformations in composite beams are dominated by concrete shrinkage and that a higher area of reinforcing bars leads to lower long-term deformations and steel stresses. The AISC model appears to overestimate the shrinkage-induced deflection. A modified ACI equation is proposed to quantify time-dependent deflections in composite beams. In particular, a modified reduction factor reflecting the influence of reinforcing bars and a coefficient reflecting the influence of ultimate shrinkage are introduced in the proposed equation. The long-term deflections predicted by this equation and the results of extensive numerical analyses are found to be in good agreement.
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참고문헌 (29)
참고문헌 신청
2019 / ACI Committee 318 Building code requirements for structural concrete (ACI 318-19) and commentary (ACI 318R19) / American Concrete Institute
AISC / 2016 / Specification for structural steel buildings, ANSI/AISC 360-16 / American Institute of Steel Construction
Safat Al-deen / 2011 / Full-scale long-term experiments of simply supported composite beams with solid slabs / Journal of Constructional Steel Research 67(3):308~321
Claudio Amadio / 2012 / Evaluation of the deflection of steel-concrete composite beams at serviceability limit state / Journal of Constructional Steel Research 73:95~104
Bradford, M. A. / 1991 / Deflections of Composite Steel-Concrete Beams Subject to Creep and Shrinkage / ACI Structural Journal 88(5):610~614
AISC / 2016 / Specification for structural steel buildings, ANSI/AISC 360-16 / American Institute of Steel Construction
Safat Al-deen / 2011 / Full-scale long-term experiments of simply supported composite beams with solid slabs / Journal of Constructional Steel Research 67(3):308~321
Claudio Amadio / 2012 / Evaluation of the deflection of steel-concrete composite beams at serviceability limit state / Journal of Constructional Steel Research 73:95~104
Bradford, M. A. / 1991 / Deflections of Composite Steel-Concrete Beams Subject to Creep and Shrinkage / ACI Structural Journal 88(5):610~614
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