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Title |
Shear Strength of Prestressed PC-CIP Composite Beams without Vertical Shear Reinforcements
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Authors |
김철구 ; 박홍근 ; 홍건호 ; 강수민 ; 서정일 |
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DOI |
https://doi.org/10.4334/JKCI.2014.26.4.533 |
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Keywords |
전단강도 ; 프리스트레스 콘크리트 ; 프리캐스트 콘크리트 ; 합성보 ; 수평전단보강 shear strength ; prestressed concrete ; precast concrete ; composite beam ; horizontal shear reinforcement |
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Abstract |
Currently, composite construction of prestressed Precast Concrete (PC) and Cast-In-Place (CIP) concrete with different concrete strengths are frequently used in the modular construction. However, current design codes do not clearly define shear design methods for such composite beams. In this present study, simply supported prestressed PC-CIP composite beams without vertical shear reinforcement or only with horizontal shear reinforcement were tested to evaluate the effect of prestressing on the shear strength and the shear design method for such composite members. The test variables were the area ratio of PC and CIP concretes, prestressing force, shear span-to-depth ratio, and shear reinforcement ratio. The results showed that the shear strength was increased by the increase of prestressing force and prestressed PC area, and the decrease of shear span-to-depth ratio.
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