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Title |
Evaluation of Horizontal Shear Strength of Prestressed Hollow-Core Slabs with Cast-in-Place Topping Concrete
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Authors |
임주혁(Ju-Hyeuk Im) ; 박민국(Min-Kook Park) ; 이득행(Deuck-Hang Lee) ; 서수연(Soo-Yeon Seo) ; 김강수(Kang-Su Kim) |
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DOI |
https://doi.org/10.4334/JKCI.2014.26.6.741 |
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Keywords |
프리스트레스트 중공 슬래브 ; 현장타설 ; 토핑콘크리트 ; 전단 ; 수평전단강도 ; 설계기준 ; prestressed hollow-core slab ; cast-in-place ; topping concete ; shear ; horizontal shear strength ; design code |
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Abstract |
Prestressed hollow-core (PHC) slabs are structurally-optimized lightweight precast floor members for long-span concrete structures, which are widely used in construction markets. In Korea, the PHC slabs have been often used with cast-in-place (CIP) topping concrete as a composite slab system. However, the PHC slab members produced by extrusion method use concrete having very low slump, and it is very difficult to make sufficient roughness on the surface as well as to provide shear connectors. In this study, a large number of push-off tests was conducted to evaluate interfacial shear strengths between PHC slabs and CIP topping concrete with the key variable of surface roughness. In addition, the horizontal shear strengths specified in the various design codes were evaluated by comparing to the test results that were collected from literature.
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