A Experimental Study on the Shear Transfer Mechanism of Reinforced Concrete Beams without Shear Confinement

전단보강이 없는 철근콘크리트 보의 전단 전달 메카니즘에 관한 실험적 연구

If reinforced concrete beam exists crack, ultimate shear transfer strength and shear hardness of section with crack substantially decrease. In this study , five model beams were designed for the objective of clarfying contributions of three shear resistant elements : the compression zone of concrete, dowel action of tension reinforcement, aggregate interlock across cracks, The shear force carried by each resistant element was calculated from the detailed strain data on the contributions to the shear capacity of beams of the shear forces carried by the other three resistant element. The test result follows : 1) Compression zone of concrete (C)-56.2%, 2) Dowel action of tension reinforcement (D)-18.0%, 3)Aggregate Interlock(A)-25.8%.