| Title |
Crack Behavior and Tension-stiffening in Ultra-High-Performance Concrete: Influence ofCover Thickness and Steel Fiber Volume Fraction |
| Authors |
주조린(Zhu, Zhao-Lin) ; 이문석(Lee, Moon-Seok) ; 손동희(Son, Dong-Hee) ; 최창식(Choi, Chang-Sik) ; 최현기(Choi, Hyun-Ki) ; 배백일(Bae, Baek-Il) |
| DOI |
https://doi.org/10.5659/JAIK.2024.40.1.235 |
| Keywords |
Ultra-High Performance Concrete; Tension Stiffening Effect; Crack Spacing; Crack Width |
| Abstract |
This study involved conducting material tests on ultra-high-performance concrete through direct tensile tests. The key variables examined were
the volume fraction of steel fiber and the cover thickness. This analysis focused on load-strain relationships, concrete tensile strength, average
crack spacing, and maximum crack width. The results reveal that as the volume fraction of steel fiber increases and the cover thickness
becomes greater, the concrete's ability to withstand tensile forces significantly improves, resulting in a more robust tension-stiffening effect.
Furthermore, the crack behavior during the crack formation stage and stabilized cracking stage indicates improved crack control performance.
After the initial crack formation stage, the concrete appears to no longer control additional tensile forces and cracks, with the primary
responsibility for crack control shifting to the steel fibers. This transition enhances the tension-stiffening effect by bridging actions of the
steel fibers after the initial crack formation stage. |