Tension Stiffening Effect of Reinforced Ultra-high-Performance Concrete Members in Tension with Thin Cover Thickness
Source abstract
Abstract
This study experimentally investigates and analyzes the key factors influencing the tension stiffening effect of ultra-high-performance concrete (UHPC) with embedded reinforcement under thin cover conditions, focusing on the effective tensile cross section and bond coefficient. Unlike conventional concrete, which loses tensile load-carrying capacity after cracking, UHPC can sustain tensile forces depending on the steel fiber content; therefore, the steel fiber volume fraction was selected as the first experimental variable. To evaluate the effect of reduced cover thickness, the second variable, the effective tensile cross section was examined by varying the reinforcement diameter and section height. Twelve specimens were fabricated, and material tests, including compressive, direct tensile, and rebar tests, were performed to assess mechanical properties. The results indicated that the tension stiffening effect increased with higher steel fiber content, while specimens with larger cross-sectional areas exhibited enhanced stiffness and reduced crack formation regions. Failure patterns revealed that both maximum crack width and average crack spacing decreased as the steel fiber content increased, due to the fiber bridging effect and the corresponding improvement in tensile strength. Comparison with existing design codes showed that the effective tensile cross section and bond coefficient of UHPC were underestimated despite the thin cover; hence, a predictive equation incorporating the steel fiber volume fraction was proposed. The proposed coefficient and effective tensile cross section improved the accuracy of the design formula in predicting the tension stiffening behavior of reinforced UHPC with thin cover.
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Research context
OpenAlex topics: Innovative concrete reinforcement materials · Structural Behavior of Reinforced Concrete · Rock Mechanics and Modeling
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Association Francaise de Génie Civil (AFGC), Ultra High Performance Fibre-Reinforced Concretes Interim Recommendations, AFGC Scientific and Technical Documents, 2002.
2. Balaguru, P., & Surendra, P. (1992). Fiber-reinforced cement composites. McGraw-Hill.
3. Bentur, A., & Mindess, S. (1990). Fiber reinforced cementitious composites. Elsevier.
4. Bischoff, P. H. (2003). Tension stiffening and cracking of steel fiber-reinforced concrete. Journal of Materials in Civil Engineering, 15(2), 174–182. https://doi.org/10.1061/(ASCE)0899-1561(2003)15:2(174)10.1061/(ASCE)0899-1561(2003)15:2(174) ↗
5. British Standards Institution (BSI), Eurocode 2: Design of concrete structures–Part 1–1: General rules and rules for buildings, BSI, UK, 2004.
6. Collins, M. P., & Mitchell, D. (1991). Prestressed concrete structures (pp. 145–147). Prentice Hall.
7. Deluce, J. R., & Vecchio, F. J. (2013). Cracking behavior of steel fiber-reinforced concrete members containing conventional reinforcement. ACI Structural Journal. https://doi.org/10.14359/5168578810.14359/51685788 ↗
8. Fang, C., Ali, M., Xie, T., Visintin, P., & Sheikh, A. H. (2020). The influence of steel fibre properties on the shrinkage of ultra-high performance fibre reinforced concrete. Construction and Building Materials, 242, Article 117993. https://doi.org/10.1016/j.conbuildmat.2019.11799310.1016/j.conbuildmat.2019.117993 ↗
9. fib Model Code for Concrete Structures 2010, Design, International Federation for Structural Concrete (fib), 2012, pp. 282–28810.1002/9783433604090 ↗
10. Guo, J. Y., Wang, J. Y., & Bian, C. (2021). Cyclic tensile behavior of high strain hardening UHPC analyzed by acoustic emission techniques. Construction and Building Materials, 267, Article 121797. https://doi.org/10.1016/j.conbuildmat.2020.12179710.1016/j.conbuildmat.2020.121797 ↗
11. Hollmann, C. P. (2014). Tensile behavior of ultra-high performance fiber reinforced concrete and reinforcement bar. University of Connecticut.
12. Khorami, M. (2023). Serviceability behaviour of reinforced UHPFRC tensile elements [Doctoral dissertation, École Polytechnique Fédérale de Lausanne]. EPFL Institutional Repository.
13. Korea Concrete Institute, Design Recommendations for Ultra-High Performance Concrete K-UHPC, Korea Concrete Institute, 2012, pp. 51–63.
14. Korean Agency for Technology and Standards (KATS), Standard Test Method for Compressive Strength of Concrete, KS F 2405, 2017.
15. Korean Agency for Technology and Standards (KATS), Method of Tensile Test for Metallic Materials, KS B 0802, 2018.
16. Li, V., Fischer, G., International RILEM Workshop on High Performance Fiber Reinforced Cementitious Composites (HPFRCC) in Structural Applications: Proceedings, RILEM, 2006.
17. Lin, L., Tan, J., Zhang, C., Wu, X., Gu, F., Zou, C., Yu, H., Wang, R., Wang, H., Zhao, Y., & Lv, P. (2025). Tension stiffening behaviors of reinforced ultra-high-performance concrete. Journal of Sustainable Cement-Based Materials. https://doi.org/10.1080/21650373.2025.249314610.1080/21650373.2025.2493146 ↗
18. Ministry of Land, Infrastructure and Transport (MOLIT), Korea Design Standard (KDS 14 20 00): Concrete Design Code, MOLIT, 2022.
19. Moreno, D. M., Trono, W., Jen, G., Ostertag, C., & Billington, S. L. (2014). Tension stiffening in reinforced high performance fiber reinforced cement-based composites. Cement and Concrete Composites, 50, 36–46. https://doi.org/10.1016/j.cemconcomp.2014.03.00410.1016/j.cemconcomp.2014.03.004 ↗
20. Soliman, A. A., Heard, W. F., Williams, B. A., & Ranade, R. (2023). Effects of the tensile properties of UHPC on the bond behavior. Construction and Building Materials, 392, Article 131990. https://doi.org/10.1016/j.conbuildmat.2023.13199010.1016/j.conbuildmat.2023.131990 ↗
21. Tamai, S. (1987). Average stress-strain relationship in post yield range of steel bar in concrete. Concrete Library of JSCE, 11, 117–129.
22. Vecchio, F. (1982). The response of reinforced concrete to in-plane shear and normal stresses. University of Toronto, Dept. of Civil Engineering, Publication, no. 82–03.
23. Xu, T., Bian, X., Liu, Z., Yang, J., & Zhang, Z. (2023). Local bond stress–slip relationship of ribbed reinforcing bars embedded in UHPC: Experiment, modeling, and verification. Journal of Building Engineering, 68, Article 106122. https://doi.org/10.1016/j.jobe.2023.10612210.1016/j.jobe.2023.106122 ↗
24. Yoo, D. Y., Kim, S., Kim, J. J., & Chun, B. (2019). An experimental study on pullout and tensile behavior of ultra-high-performance concrete reinforced with various steel fibers. Construction and Building Materials, 206, 46–61. https://doi.org/10.1016/j.conbuildmat.2019.02.05810.1016/j.conbuildmat.2019.02.058 ↗
25. Zhu, Z. L., et al. (2023). Crack behavior and tension-stiffening in ultra-high-performance concrete: Influence of cover thickness and steel fiber volume fraction. Journal of the Architectural Institute of Korea, 40(1), 872.