| Title |
The Influence of Minimum Shear Reinforcement Ratio on the Shear Behavior of Reinforced Concrete Deep Beams |
| Authors |
Yang Keun-Hyeok ; Chung Heon-Soo |
| Keywords |
deep beams ; strut-tie model ; minimum and maximum shear bar ratio ; shear span-depth ratio |
| Abstract |
Reinforced concrete deep beams can be designed using a strut-tie model consisting of concrete compression struts, steel tension ties, and joints referred to as nodal zones. The spreading of the compression forces in a strut gives rise to transverse tensions, which may cause the strut to crack longitudinally. To prevent progress of longitudinal cracking in a strut and to resist the tensile force due to the lateral spread of the strut forces, minimum horizontal or vertical shear reinforcement should be provided. Sixteen reinforced concrete continuous deep beams with minimum shear reinforcement recommended by ACI 318-02 were tested. From investigation of this test result and existing data, the influence of minimum shear reinforcement ratio on the shear behavior of reinforced concrete deep beams was evaluated. Also Based on strut-tie model developed by MacgreGor, this study proposed minimum shear reinforcement ratio which considered the effectiveness of horizontal and vertical shear reinforcements with shear span-depth ratio. |