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Title |
Shear Strength of PC-CIP Composite Beams with Shear Reinforcement
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DOI |
https://doi.org/10.4334/JKCI.2014.26.2.189 |
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Keywords |
전단강도 ; 다른 압축강도 ; 프리캐스트 콘크리트 ; 합성보 ; 횡보강 shear strength ; different concrete strength ; precast concrete ; composite beam ; shear reinforcement |
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Abstract |
Currently, in the precast concrete construction, Precast Concrete (PC) and Cast-In-Place (CIP) concrete with different concrete strengths are frequently used. However, current design codes do not specifically provide shear design methods for PC-CIP hybrid members using dual concrete strengths. In the present study, simply supported composite beams with shear reinforcement were tested. The test variables were the area ratio of the two concretes, spacing of shear reinforcement, and shear span-to-depth ratio. The shear strengths of the test specimens were evaluated by current design codes on the basis of the test results. The results showed that the shear strength of the composite beams was affected by the concrete strength of the compressive zone and also proportional to the flexural rigidity of un-cracked sections. Furthermore, the contribution of shear reinforcements varied according to the concrete strength of the compressive zone.
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