Numerical Investigation of HSC Columns Retrofitted by CFRP Materials under Combined Load

Mohammed El Youbi, Taoufik Tbatou, Imad Kadiri, Saïf Ed-Dîn Fertahi

Abstract


Repairing and retrofitting old civil engineering structures based on reinforced concrete represents a challenge for civil engineering societies all over the world. Environmental impacts such as corrosion and natural disasters like earthquakes can considerably weaken those structures. Reinforced concrete confinement technique using carbon fiber-reinforced polymers (CFRP) is considered as an innovative solution to strengthen the old and damaged structures. In this paper, a numerical simulation was carried out to evaluate the impact of the CFRP jacket as a confining composite material on the compressive strength and the ultimate strain of confined reinforced concrete. A FE model was developed, validated by comparing its results with the available experimental measurements, and finally assessed by performing a parametric study. Indeed, the parametric investigations had as their purpose the evaluation of the level of confinement (different number of plies), namely without plies, one plie, and three plies configuration, that were subjected to different eccentric loading modes e=0, e=25 and e=50 mm, in order to assess the interaction between the combined load that can be represented by compressive and flexural effect. The numerical results were, in fact, in good agreement with the experimental data. In addition, CFRP wrapping had a significant effect on the maximum load of eccentrically loaded columns compared to concentrically loaded columns by increasing the compressive strength with a value of 15% gain compared to the unconfined column.

 

Doi: 10.28991/CEJ-2022-08-04-011

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Keywords


Composite Materials; Civil Engineering; Structures; Reinforced Concrete; FEA.

References


Shin, J., & Jeon, J. S. (2022). Seismic damage mitigation strategy using an FRP column jacketing system in gravity-designed reinforced concrete building frames. Composite Structures, 279. doi:10.1016/j.compstruct.2021.114700.

Maheswaran, J., Chellapandian, M., & Arunachelam, N. (2022). Retrofitting of severely damaged reinforced concrete members using fiber reinforced polymers: A comprehensive review. Structures, 38, 1257–1276. doi:10.1016/j.istruc.2022.02.059.

Salesa, A., Esteban, L. M., & Barris, C. (2022). Confinement of FRP concrete columns: Review of design guidelines and comparison with experimental results. Materiales de Construcción, 72(345), e274. doi:10.3989/mc.2022.03821.

Saleh, E., Tarawneh, A., Almasabha, G., & Momani, Y. (2022). Slenderness limit of FRP-confined rectangular concrete columns. Structures, 38, 435–447. doi:10.1016/j.istruc.2022.02.030.

Bedirhanoglu, I., Ilki, A., & Triantafillou, T. C. (2022). Seismic Behavior of Repaired and Externally FRP-Jacketed Short Columns Built with Extremely Low-Strength Concrete. Journal of Composites for Construction, 26(1), 4021068. doi:10.1061/(asce)cc.1943-5614.0001179.

Al-Rousan, R. Z. (2022). Cyclic behavior of alkali-silica reaction-damaged reinforced concrete beam-column joints strengthened with FRP composites. Case Studies in Construction Materials, e00869. doi:10.1016/j.cscm.2022.e00869.

Du, Y., Gao, D., Chen, Z., Zheng, Z., & Wang, X. (2022). Behaviors of FRP confined rectangular concrete-filled thin-walled steel tubular stub columns using high-strength materials under axial load. Composite Structures, 280, 114915. doi:10.1016/j.compstruct.2021.114915.

Sanginabadi, K., Yazdani, A., Mostofinejad, D., & Czaderski, C. (2022). RC members externally strengthened with FRP composites by grooving methods including EBROG and EBRIG: A state-of-the-art review. Construction and Building Materials, 324, 126662. doi:10.1016/j.conbuildmat.2022.126662.

Bai, Y. L., Zhang, Y. F., Jia, J. F., Mei, S. J., Han, Q., & Dai, J. G. (2022). Simplified plasticity damage model for large rupture strain (LRS) FRP-confined concrete. Composite Structures, 280, 114916. doi:10.1016/j.compstruct.2021.114916.

Zeng, J. J., Zhu, D. H., Liao, J. J., Zhuge, Y., Bai, Y. L., & Zhang, L. (2022). Large-rupture-strain (LRS) FRP-confined concrete in square stub columns: Effects of specimen size and assessments of existing models. Construction and Building Materials, 326, 126869. doi:10.1016/j.conbuildmat.2022.126869.

Ye, Y. Y., Zeng, J. J., & Li, P. L. (2022). A State-of-the-Art Review of FRP-Confined Steel-Reinforced Concrete (FCSRC) Structural Members. Polymers, 14(4), 677. doi:10.3390/polym14040677.

Fukuyama, H., & Sugano, S. (2000). Japanese seismic rehabilitation of concrete buildings after the Hyogoken-Nanbu earthquake. Cement and Concrete Composites, 22(1), 59–79. doi:10.1016/S0958-9465(99)00042-6.

Wu, H.-C., & Eamon, C. D. (2017). Introduction. In Strengthening of Concrete Structures using Fiber Reinforced Polymers (FRP) (pp. 1–10). doi:10.1016/b978-0-08-100636-8.00001-6.

Beroual, S., & Samai, M. L. (2021). Determination of Reinforced Concrete Rectangular Sections Having Plastic Moments Equal to all IPE Profiles. Civil Engineering Journal, 7(4), 614–632. doi:10.28991/cej-2021-03091677.

Opabola, E. A., Elwood, K. J., & Liel, A. B. (2021). Evaluation of seismic performance of as-built and retrofitted reinforced concrete frame structures with LAP splice deficiencies. Earthquake Engineering and Structural Dynamics, 50(12), 3138–3159. doi:10.1002/eqe.3503.

de Diego, A., Arteaga, Á., & Fernández, J. (2019). Strengthening of square concrete columns with composite materials. Investigation on the FRP jacket ultimate strain. Composites Part B: Engineering, 162, 454–460. doi:10.1016/j.compositesb.2019.01.017.

Fanaradelli, T., Rousakis, T., & Karabinis, A. (2019). Reinforced concrete columns of square and rectangular section, confined with FRP – Prediction of stress and strain at failure. Composites Part B: Engineering, 174, 107046. doi:10.1016/j.compositesb.2019.107046.

Hasan, H. A., Sheikh, M. N., & Hadi, M. N. S. (2019). Maximum axial load carrying capacity of Fibre Reinforced-Polymer (FRP) bar reinforced concrete columns under axial compression. Structures, 19, 227–233. doi:10.1016/j.istruc.2018.12.012.

Abdulla, M. D., & Khaduier, Z. A. (2018). Nonlinear Finite Elements Analysis of Reinforced Concrete Columns Strengthened With Carbon Fiber Reinforced Polymer (CFRP). Journal of University of Babylon for Engineering Sciences, 26(3), 75–97. doi:10.29196/jub.v26i3.618.

Al-Rousan, R. (2020). Behavior of Circular Reinforced Concrete Columns Confined with CFRP Composites. In Procedia Manufacturing, 44, 623–630. doi:10.1016/j.promfg.2020.02.247.

Hawileh, R. A., Musto, H. A., Abdalla, J. A., & Naser, M. Z. (2019). Finite element modeling of reinforced concrete beams externally strengthened in flexure with side-bonded FRP laminates. Composites Part B: Engineering, 173, 106952. doi:10.1016/j.compositesb.2019.106952.

Al-Nimry, H., & Neqresh, M. (2019). Confinement effects of unidirectional CFRP sheets on axial and bending capacities of square RC columns. Engineering Structures, 196, 109329. doi:10.1016/j.engstruct.2019.109329.

Mhanna, H. H., Hawileh, R. A., & Abdalla, J. A. (2019). Shear strengthening of reinforced concrete beams using CFRP wraps. Procedia Structural Integrity, 17, 214–221. doi:10.1016/j.prostr.2019.08.029.

Hadi, M. N. S., & Widiarsa, I. B. R. (2012). Axial and Flexural Performance of Square RC Columns Wrapped with CFRP under Eccentric Loading. Journal of Composites for Construction, 16(6), 640–649. doi:10.1061/(asce)cc.1943-5614.0000301.

ANSYS. (2017). ANSYS Help. Release 18.20. Available online: https://www.ansys.com/it-solutions/platform-support/previous-releases (accessed on January 2022).

Wight, J. K., & MagGregor, J. G. (2011). Reinforced Concrete: Mechanics and Design (6th Ed.). Prentice Hall, Hoboken, United States.

Lam, L., & Teng, J. G. (2003). Design-oriented stress-strain model for FRP-confined concrete in rectangular columns. Journal of Reinforced Plastics and Composites, 22(13), 1149–1186. doi:10.1177/0731684403035429.

Teng, J. G., Chen, J. F., Smith, S. T., & Lam, L. (2003). Behaviour and strength of FRP-strengthened RC structures: A state-of-the-art review. Proceedings of the Institution of Civil Engineers: Structures and Buildings, 156(1), 51–62. doi:10.1680/stbu.2003.156.1.51.

Berthet, J. F., Ferrier, E., & Hamelin, P. (2005). Compressive behavior of concrete externally confined by composite jackets. Part A: Experimental study. Construction and Building Materials, 19(3), 223–232. doi:10.1016/j.conbuildmat.2004.05.012.


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DOI: 10.28991/CEJ-2022-08-04-011

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