| Title |
A Study on the Shear Strength Characteristics of High Strength Reinforced Concrete Beams According to Beam Size and Shear Reinforcement Spacing Ratio |
| Authors |
유인근(Yu, In-Geun) ; 박나정(Park, Na-Jeong) ; 백승민(Baek, Seung-Min) ; 김우석(Kim, Woo-Suk) ; 곽윤근(Kwak, Yoon-Keun) |
| DOI |
https://doi.org/10.5659/JAIK.2021.37.9.167 |
| Keywords |
Shear Reinforcement Ratio; Size Effect; Shear Strength; High Strength Reinforced concrete |
| Abstract |
This study conducted an experiment on the shear strength of high-strength reinforced concrete beams depending on the effects of shear
reinforcement spacing and beam size. Through experiments, experimental values were compared with the theoretical values based on standard
equations such as KDS 14 20 22, ACI 318-19, CEB-FIP, and existing proposal equations which are Zsutty, Bazant, and Lee’s equations. It
will be compared and analyzed to be used as basic data for shear design of reinforced concrete beams with fck = 50 MPa, ρ = 0.025 and
the width-to-depth ratio (h/b) were constant, and the beam size (b×d) and shear reinforcement spacing (d/s) were variables. The test
specimens were divided into three series, SHR1, SHR2, and SHR3, according to the size of the cross section. As a result of comparing the
experimental value and the theoretical value according to the standard equations and the proposed equations, the average value was 1.15 to
1.61 and the standard deviation was 0.16 to 0.20. Among the comparisons between the standard and proposed equations, the Zsutty, Bazant,
and Lee’s equations predict experimental values relatively well. The mean of the Zsutty’s equation was 1.29, the standard deviation was 0.18,
the mean of the Bazant’s equation was 1.15, the standard deviation was 0.19, the mean of the Lee’s equation was 1.17, and the standard
deviation was 0.20, respectively. |