| Title |
Effect of fiber shape and tensile strength on the performance of Steel Fiber Reinforced Concrete |
| Authors |
홍건호(Hong, Geon-Ho) ; 김현진(Kim, Hyeon-Jin) ; 김경찬(Kim, Kyung-Chan) |
| DOI |
https://doi.org/10.5659/JAIK.2025.41.11.311 |
| Keywords |
Steel Fiber Reinforced Concrete; Steel Fiber; Fiber Shape; Tensile Strength of Steel Fiber; CMOD |
| Abstract |
This study evaluated the effects of fiber shape and strength on the tensile performance of steel fiber reinforced concrete (SFRC). Pull-out
tests and CMOD tests were conducted using two fiber shapes (end-hooked and wave) and two tensile strength levels (1,100 MPa and 1,500
MPa) as variables. In the pull-out tests, the wave-type fiber showed superior bond performance to the end-hooked type, particularly at higher
fiber tensile strength, achieving high bond resistance without fiber fracture. In the CMOD tests, the end-hooked type showed slightly higher
initial flexural performance at lower fiber tensile strength, whereas at higher tensile strength, the wave type outperformed in both initial and
residual flexural strength. Nonlinear finite element analysis revealed that the end-hooked fiber exhibited stress concentration near the hook,
raising concerns about early fracture, while the wave-type fiber showed stress distribution along the entire embedded length. This result
indicates that, in actual behavior, the wave type is likely to possess greater deformation capacity. These findings provide valuable reference
data for selecting fibers in the optimal design of SFRC. |