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Title |
Long-term Behavior of Deck-plate Concrete Slab Reinforced with Steel Fiber
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Authors |
홍건호(Geon-Ho Hong) ; 황승구(Seung-Koo Hwang) |
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DOI |
https://doi.org/10.11112/jksmi.2017.21.4.030 |
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Keywords |
강섬유 ; 데크플레이트 슬래브 ; 균열 거동 ; 콘크리트의 건조수축 ; 처짐 Steel fiber ; Deck-plate slab ; Cracking behavior ; Drying shrinkage of concrete ; Deflection |
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Abstract |
Recently, research on the development of a composite slab system for shorting the construction period by simplifying the process by omitting the form work and the reinforcement placing is underway. The purpose of this study is to evaluate the long-term behavior of a simplified slab system that replaces the form work and tensile reinforcement using structural deck-plate and replaces the temperature reinforcement using steel fiber reinforced concrete. In the conventional composite deck-plate slab method, w.w.f is generally used for crack control by drying shrinkage. But previous research results by various researchers were pointed out it is not effective to control the shrinkage and temperature cracking. In this study, the long-term cracking and structural behavior of steel fiber reinforced deck plate slab specimen with two continuous spans constructed under typical load conditions were evaluated. Experimental results showed that the number and width of long-term cracks decreased remarkably in the simplified slab specimen, and the deflection was also decreased compared with conventional RC slab specimen. However, in the continuous end of the slab where the negative moment is applied, it is analyzed that reinforced details are necessary to control the crack width in the service load and to recover deflection at load removal.
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