Shear Strengthening of RC Corbels with Carbon Fiber Reinforced Polymer Sheets: A Critical Review
DOI:
https://doi.org/10.15282/construction.v4i2.10760Keywords:
Carbon fiber reinforced polymer, Mode of failures, Reinforced concrete corbels, Shear resistanceAbstract
Reinforced concrete corbels are essential components in construction that function as short cantilevers to provide support for different pre-cast and pre-stressed structural elements. The corbels often experience failure modes such as shear, flexural, diagonal shear, anchoring loss, vertical splitting, and bearing failures. These modes arise due to variables such as insufficient reinforcing and inadequate detailing. In order to address these problems, the use of CFRP as a form of reinforcement may be used. This study aims to provide several methods for reinforcing corbels using CFRP jacketing, which is chosen for its exceptional strength-to-weight ratio and simplicity of application. The efficacy of CFRP reinforcements is evaluated by means of load capacity, load-displacement curves, and fracture patterns. The addition of two layers of external CFRP reinforcement on concrete corbels resulted in an average increase in load bearing capacity of up to 35%. Furthermore, the experimental results have shown that CFRP has the capability to substantially enhance the load-bearing capacity of RC corbels, even if it does not reach the levels of the original design.
References
N.H. Al-Kaabi, H. Al-Thairy, and M.A. Dhaheer, “Behaviour of reinforced concrete corbels strengthened by FRP composites and steel bars: a critical review,” in IOP Conference Series: Earth and Environmental Science, vol. 1232, no. 1, p. 012035, 2023.
L.J. Mahmood and F.R. Karim, “Shear resistance of fibrous reinforced concrete corbels-A critical review,” Construction, vol. 2, no. 1, pp. 66-78, 2022.
E. Khalifa, “Macro-mechanical strut and tie model for analysis of fibrous high-strength concrete corbels,” Ain Shams Engineering Journal, vol. 3, no. 4, pp. 359-365, 2012.
Q.M. Shakir, “Analysis, behavior, strengthening and repairing of reinforced concrete corbels: Comprehensive review,” Journal of Materials and Engineering Structures, vol. 10, no. 2, pp. 157-184, 2023.
K. Nagai, “Structural strengthening of RC corbel subjected to local failure criterion by external CFRP wrap,” Proceedings of the Annual Meeting of the Concrete Institute, vol. 36, pp. 1255-1260, 2014.
R.C. Neupane, L. Eddy, and K. Nagai, “Investigation on strengthening approaches adopted for poorly detailed RC corbels,” Fibers, vol. 5, no. 2, pp. 16, 2017.
S. Ozden, and H.M. Atalay, “Strengthening of reinforced concrete corbels with GFRP overlays,” Science and Engineering of Composite Materials, vol. 18, no. 1-2, pp. 69-77, 2011.
P. Phan-Vu, and D.T. Tran, “Strengthening precracked post-tensioned concrete beams with CFRP composites,” in International Conference on Structural Health Monitoring and Engineering Structures, Singapore: Springer Nature Singapore, pp. 133-142, 2023.
H. Wang, C. Li, S. Song, Y. Wang, Q. Meng, and F. Li, “Flexural performance of cracked reinforced concrete beams strengthened with prestressed CFRP sheets under repeated loads,” Buildings, vol. 13, no. 8, pp. 2115, 2023.
T.H. Nguyen, V.T. Nguyen, X.D. Pham, M.H. Nguyen, and P.L. Le, “Experimental study on the strengthening effect of CFRP sheets on corrosion-damaged, eccentrically loaded reinforced concrete columns, “International Journal of Civil Engineering,” vol. 22, no. 4, pp. 535-547, 2024.
A. Jahami and C.A. Issa, “An updated review on the effect of CFRP on flexural performance of reinforced concrete beams,” International Journal of Concrete Structures and Materials, vol. 18, no. 1, pp. 14, 2024.
N. Attari, S. Amziane, and M. Chemrouk, “Flexural strengthening of concrete beams using CFRP, GFRP and hybrid FRP sheets,” Construction and Building Materials, vol. 37, pp. 746-757, 2012.
D.T. Tran, T.M. Pham, H. Hao, T.V. Do, and T.T. Tran, “Blast behaviour of precast segmental vs monolithic concrete beams prestressed with unbonded tendons: A numerical investigation,” International Journal of Impact Engineering, vol. 173, pp. 104434, 2023.
A. Abadel et al., “Experimental study of shear behavior of CFRP strengthened ultra-high-performance fiber-reinforced concrete deep beams,” Case Studies in Construction Materials, vol. 16, pp. e01103, 2022.
C.-Y.Zhou, Y.-N. Yu, and E.-L. Xie, “Strengthening RC beams using externally bonded CFRP sheets with end self-locking,” Composite Structures, vol. 241, pp. 112070, 2020.
H.Toutanji and G. Ortiz, “The effect of surface preparation on the bond interface between FRP sheets and concrete members,” Composite Structures, vol. 53, no. 4, pp. 457-462, 2001.
R.Z. Al-Rousan and M.F. AL-Tahat, “Consequence of surface preparation techniques on the bond behavior between concrete and CFRP composites,” Construction and Building Materials, vol. 212, pp. 362-374, 2019.
S.K.I. Al-Fadhli, “Ultimate strength of concrete corbels with hybrid reinforcement and strengthened externally by carbon fiber,” Journal of Engineering and Sustainable Development, vol. 21, no. 1, pp. 89-103, 2017.
T.A. El-Maaddawy and E.-S.I. Sherif, “Response of concrete corbels reinforced with internal steel rebars and external composite sheets: Experimental testing and finite element modeling,” Journal of Composites for Construction, vol. 18, no. 1, pp. 04013020, 2014.
M.A. Attiya and A.A. Mohamad-Ali, “Experimental behaviour of reinforced concrete corbels strengthened with carbon fibre reinforced polymer strips,” Basrah Journal for Engineering Sciences, vol. 12, pp. 31-45, 2012.
Q.M. Shakir and S.D. Abdlsaheb, “Strengthening of the self-compacted reinforced concrete corbels using NSM steel bars and CFRP sheets techniques,” Journal of Engineering Science and Technology, vol. 17, no. 3, pp. 1764-1780, 2022.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2024 The Author(s)
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
