This study presents the shear capacity of eco-friendly high-strength concrete (HSC) beams reinforced by 0.75% (by volume) of hooked steel fibers or shear stirrups with various spacings. Five large-scale HSC beams with steel fibers or stirrups were tested and investigated with respect to shear capacity, failure mode, and crack patterns. The test results indicate that all five tested beams finally failed by a shear-critical failure mode and that the use of 0.75 vol% of steel fibers significantly improved the shear strength although it decreased the diagonal crack angle of HSC beam in the case of without stirrups. There are some different properties compared with ACI 318-19 recommendation, but the use of 0.75 vol% steel fibers exhibited approximately 13.2% higher shear strength when compared with that of minimum shear reinforcement for the HSC beam. Furthermore, the shear capacity of steel fibers calculated by experimental data, and it was compared with several prediction equations. The prediction models containing fiber factor were more closely agreeable with test results with a minimum of 10.9% difference.
|Journal||International Journal of Concrete Structures and Materials|
|Publication status||Published - 2020 Dec 1|
Bibliographical noteFunding Information:
This work was supported by the Industrial Strategic Technology Development Program (10063488, Development of Earthquake Resisting Reinforced Concrete using grade 700 MPa Reinforcing Bars for enhancement of seismic safety) funded By the Ministry of Trade, industry & Energy (MI, Korea). Acknowledgements
© 2020, The Author(s).
- high-strength concrete
- hooked steel fiber
- shear capacity
ASJC Scopus subject areas
- Civil and Structural Engineering
- Ocean Engineering