Theoretical-experimental behavior of steel fibers as a partial replacement for shear reinforcement in reinforced concrete beams
Abstract
It is proposed to partially replace the stirrups with steel fibers and thus improve the shear strength concrete beams. The following variables were studied: water/cement ratios (w/c) = 0.55 and 0.35 and fiber volume (Vf) = 0, 0.3, 0.5, 0.7% and 0, 0.2, 0.4, 0.6% respectively, as well as the separation of the stirrups. The experimental results showed that the shear strength of the fiber-reinforced and stirrups, was greater than the strength of the control beams with only stirrups at a separation of d/2. From the comparison between the experimental data and the mathematical models, it was found that both models adequately predict the effect of the w/c ratio, Vf, the contribution of longitudinal steel and the presence of stirrups in the ultimate strength to shear. The proposed models predicted in most cases conservative values with respect to the ultimate shear strength.
Downloads
References
ACI 318S-14, (2014), Requisitos de Reglamento para Concreto Estructural y Comentarios, Instituto Americano del Concreto, ACI.
Ashour, S. A., Hasanain, G. S., Wafa, F. F. (1992), Shear Behavior of High-Strength Fiber Reinforced Concrete Beams, ACI Structural Journal, Vol. 89, No. 2, March-April, pp. 176 – 184.
Aoude, H., Belghiti, M., Cook, W. D., Mitchell, D. (2012), Response of steel fiber-reinforced concrete beams with and without stirrups, ACI Structural Journal, Vol. 109, No. 3, pp. 359-367.
ASTM International. (2018). ASTM C33 / C33M-18, Standard Specification for Concrete Aggregates. Annual Book of ASTM Standards, American Society of Testing Materials. https://doi.org/10.1520/C0033_C0033M-18
ASTM International. (2020). ASTM A615 / A615M-20, Standard Specification for Deformed and Plain Carbon-Steel Bars for Concrete Reinforcement. West Conshohocken, PA. https://doi.org/10.1520/A0615_A0615M-20
ASTM International. (2016). ASTM A820 / A820M-16, Standard Specification for Steel Fibers for Fiber-Reinforced Concrete. West Conshohocken, PA. https://doi.org/10.1520/A0820_A0820M-16
ASTM International. (2020). ASTM C143 / C143M-20, Standard Test Method for Slump of Hydraulic-Cement Concrete. West Conshohocken, PA. https://doi.org/10.1520/C0143_C0143M-20
ASTM International. (2019). ASTM C192 / C192M-19, Standard Practice for Making and Curing Concrete Test Specimens in the Laboratory, Annual Book of ASTM Standards, American Society of Testing Materials. https://doi.org/10.1520/C0192_C0192M-19
ASTM International. (2021). ASTM C39 / C39M-21, Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens. West Conshohocken, PA. https://doi.org/10.1520/C0039_C0039M-21
ASTM International. (2017). ASTM C496 / C496M-17, Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens. West Conshohocken, PA. https://doi.org/10.1520/C0496_C0496M-17
ASTM International. (2017a). ASTM C231 / C231M-17a, Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method. West Conshohocken, PA. https://doi.org/10.1520/C0231_C0231M-17A
Dinh, H. H., Parra-Montesinos, G. J., Wight, J. K. (2010), Shear behavior of steel fiber-reinforced concrete beams without stirrup reinforcement, ACI Structural Journal, Vol. 107, No. 5, pp. 597-606.
Dupont, D., Vandewalle, L. (2003), Shear Capacity of Concrete Beams Containing Longitudinal Reinforcement and Steel Fibers, ACI Structural Journal, Vol. 216, pp. 79 – 94.
Haisam, E. Y. (2011), Shear Stress Prediction: Steel Fiber - Reinforced Concrete Beams without Stirrups, ACI Structural Journal, Vol. 108, No. 3, May-June, pp. 304 – 314.
Juarez, C., Valdez, P., Durán, A., Sobolev, K. (2007), The diagonal tension behavior of fiber reinforced concrete beams, Cement & Concrete Composites, 29(5):402-408. https://doi.org/10.1016/j.cemconcomp.2006.12.009
Jun Z., Jingchao L., Liusheng C. and Fuqiang S. (2018), Experimental Study on Shear Behavior of Steel Fiber Reinforced Concrete Beams with High-Strength Reinforcement. Materials, 11 (9), 1682, pp. 1-19. https://doi.org/10.3390/ma11091682
Khuntia, M., Stojadinovic, B. (2001), Shear Strength of Reinforced Concrete Beams without Transverse Reinforcement, ACI Structural Journal, Vol. 98, No. 5, September-October, pp. 648 – 656.
Marì Bernat, A., Spinella, N., Recupero, A. (2020), Mechanical model for the shear strength of steel fiber reinforced concrete (SFRC) beams without stirrups. Materials and Structures. 53(28). https://doi.org/10.1617/s11527-020-01461-4
Narayanan, R., Darwish, I. Y. S. (1987), Use of Steel Fibers as Shear Reinforcement, ACI Structural Journal, 84 (3), May – June, pp. 216 – 226.
Organismo Nacional de Normalización y Certificación de la construcción y Edificación, S.C. (ONNCCE) (2017). NMX-C-414-ONNCCE: Industria de la Construcción – Cementos Hidráulicos - Especificaciones y Métodos de Prueba. Norma Mexicana.
Park, P., Paulay, T. (1990), “Estructuras de Concreto Reforzado”, Editoriales Limusa y Noriega, Nueva Edición, pp. 288 – 294. https://www.u-cursos.cl/usuario/7ed3df485e955c4de1ffa12120d4bb52/mi_blog/r/estructuras_de_concreto_reforzado_-_r._park___t._paulay.pdf
Sarhat, S. R., Abdul-Ahad, R. B. (2006), The Combined Use of Steel Fibers and Stirrups as Shear Reinforcement in Reinforced Concrete Beams, SP, American Concrete Institute, vol. 235, pp. 269 – 282.
Shin, S. W., Oh, J. G., Ghosh, S. K. (1994), Shear Behavior of Laboratory-Sized High Strength Concrete Beams Reinforced with Bars and Steel Fibers, American Concrete Institute, Volume 142. pp. 181-200.
Swamy, R. N., Bahía, H. M. (1985), The Effectiveness of Steel Fibers as Shear Reinforcement, Concrete International, Design and Construction, Vol. 7, No. 3, March, pp. 35 – 40.
Swamy, R. N., Mangat, P. S., Rao, C. V. S. K. (1974), The Mechanics of Fiber Reinforcement of Cement Matrices, Symposium Paper, American Concrete Institute, 44, pp. 1 – 28.
Swamy, R. N., Narayan, J., Roy, Chiam, T. P. (1993), Influence of Steel Fibers on the Shear Resistance of Lightweight Concrete I – Beams, ACI Structural Journal, Vol.90, No. 1, January – February, pp. 103 – 114. https://doi.org/10.14359/4201
Copyright (c) 2021 César Antonio Juárez Alvarado, José Manuel Mendoza Rangel, Bernardo Tadeo Terán Torres, Pedro Leobardo Valdez Tamez, Gregorio Castruita Velázquez (Author)
This work is licensed under a Creative Commons Attribution 4.0 International License.
_______________________________
License in effect from September 2020
You are free to:
- Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
- Adapt — remix, transform, and build upon the material for any purpose, even commercially.
- The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
- Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
Notices:
You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable exception or limitation .
No warranties are given. The license may not give you all of the permissions necessary for your intended use. For example, other rights such as publicity, privacy, or moral rights may limit how you use the material.
.png)
