| Title |
Influence of Number of Layers of CFRP Grid Reinforcements on Punching Shear Behavior of Concrete Slabs |
| Authors |
윤현도(Yun, Hyun-Do) ; 박완신(Park, Wan-Shin) ; 김선우(Kim, Sun-Woo) ; 김정은(Kim, Jeong-Eun) |
| DOI |
https://doi.org/10.5659/JAIK.2025.41.2.319 |
| Keywords |
CFRP Grid; Concrete Slab; Punching Shear Behavior; Reinforcement Layers |
| Abstract |
This study examines the punching shear behavior of concrete slabs reinforced with different layers of Carbon Fiber-Reinforced Polymer
(CFRP) grids, presenting detailed experimental findings. Six full-scale CFRP grid-reinforced concrete slabs were tested, maintaining consistent
grid width, thickness, and reinforcement levels across samples. Results indicated that concrete slabs with two CFRP grid layers had smaller
crack widths, closer crack spacing, and more cracks compared to those with a single layer. Under the same reinforcement conditions,
two-layer specimens achieved approximately 20% higher punching shear strength. Strain analysis showed that CFRP grids in single-layer
specimens deformed at lower loads, suggesting reduced load-bearing capacity compared to multi-layer configurations. The punching shear
strength results were also compared with established prediction formulas, and the proposed formula based on the equivalent reinforcement
ratio concept showed high accuracy, confirming its reliability for design applications. |