| Title |
Analysis of Shear Friction Strength of Separated Steel Fiber Reinforced Concrete under Direct Shear Test |
| Authors |
이혜원(Lee, Hye-Won) ; 손동희(Son, Dong-Hee) ; 배백일(Bae, Baek-Il) ; 최창식(Choi, Chang-Sik) |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.10.243 |
| Keywords |
precast concrete; shear friction; steel fiber reinforced concrete |
| Abstract |
When precast concrete elements and cast-in-place concrete are formed separately, they create shear friction at their interface. Ensuring
structural integrity is vital, and this involves placing shear friction reinforcement at this interface. Steel fibers are recognized for enhancing
shear strength by leveraging the dowel action of shear friction reinforcements, and shear friction capacity can be improved by using steel
fibers locally. In this study, 12 push-off tests were conducted to assess how steel fiber reinforced concrete (SFRC) contributes to shear
friction strength in direct shear. The experimental findings were also compared with the predicted values from current code provisions. These
experiments revealed that the crack width at maximum shear friction strength increased as the volume of steel fibers increased, and the
contribution of concrete also increased with higher steel fiber volume. Notably, Eurocode 2 yielded higher contributions compared to
AASHTO LRFD. Eurocode 2, which takes into account concrete's tensile strength, provided the most accurate results. Therefore, future studies
should consider the influence of concrete when designing for shear friction strength. |