| Title |
A Characteristic Study on Shear Strength of Reinforced Concrete Beams according to Longitudinal Reinforcement Ratio and Size Effect |
| Authors |
Yu, In-Geun ; Noh, Hyung-Jin ; Lee, Ho-Kyung ; Baek, Seung-Min ; Kim, Woo-Suk ; Kwak, Yoon-Keun |
| DOI |
https://doi.org/10.5659/JAIK_SC.2020.36.2.117 |
| Keywords |
Longitudinal Reinforcement Ratio; Size Effect; Shear Strength |
| Abstract |
The main objective of this experimental study is to investigate shear strength of reinforced concrete beams according to longitudinal
reinforcement ratio () and size effect. In order to find out the shear strength according to the tensile reinforcement ratio, in particular, the
main variables are 100%, 75% and 50% of which is widely used in construction field. A total of twelve RC beams were tested
under 4-point loading conditions. In addition to the existing proposal equations, the theoretical values such as KBC and ACI equations are
compared with the experimental data. Through this analysis, this study is designed to provide more reasonable equations for shear design of
reinforced concrete beams. When shear reinforcement bar spacing of nine specimens (R*-1, R*-2, and R*-3 series) fixed as d/s=2.0 and three
specimens of R*-4 series fixed as d/s=1.5 are compared, the shear strength of two groups showed similar values. As a result, the current
standard of d/s=2.0 for shear reinforcement bar spacing may be somewhat alleviated. |