Finite Element Modelling and Experimental Validation of CFRP-Strengthened Reinforced Concrete Beams

Yaman Al-Kamaki; Riadh Al-Mahaidi; Mand Askar; Razaq Ferhadi

Authors

Yaman Al-Kamaki Highway and Bridge Department, Technical College of Engineering, Duhok Polytechnic University (DPU)
Riadh Al-Mahaidi School of Engineering, Swinburne University of Technology, Hawthorn, Australia https://orcid.org/0000-0003-4456-6594
Mand Askar Highway and Bridge Department, Technical College of Engineering, Duhok Polytechnic University (DPU) https://orcid.org/0000-0002-8918-842X
Razaq Ferhadi College of Engineering, The American University of Kurdistan (AUK), Duhok, Kurdistan Region, Iraq https://orcid.org/0000-0002-9277-4120

Keywords:

reinforced concrete (RC) beams, Carbon fiber-reinforced polymer (CFRP), finite element models (FEMs), Strengthening, ATENA-GiD software

Abstract

Extreme loading and harsh environmental exposure are two of the many variables that can lead to reinforced concrete (RC) beam deterioration. Nowadays, the recommended technique for extending the life duration of degraded structures is the use of fiber-reinforced polymer (FRP) strengthening materials. FRP composites have been utilized to strengthen concrete members since the late 1970s in order to increase their ductility and load-bearing capability. Although FRP has been effectively utilized to repair concrete beams that have deteriorated due to both internal and external influences, the use of appropriate software limits the numerical modeling of Carbon Fiber-Reinforced Polymer (CFRP) for RC beam strengthening. To investigate the structural response, FEMs were developed in ATENA-GiD, aiming to clarify the behavior of both the control beams and those repaired with CFRP, and to assess their load-bearing capacity. This is a unique software that can be used only for RC elements. It can be stated from the experimental results taken from previously published work that the load-bearing capacity and deflection for the control beam were 47.7 kN and 35.7 mm, respectively. By adding one unidirectional CFRP sheet as U-wraps, the load increased and deflection decreased by 24.9 % and 48.2 %, respectively. When using the same test results for verification using FE software, the load-bearing capacity and deflection for the simulated model were 49.4 kN and 37.6 mm, respectively. When adding the CFRP sheet to the model, similar to that of experimental work done. After the analysis stage, the load increased and deflection decreased by 24.1 % and 52.1 %, respectively. This indicates that FRP has become a powerful composite material for strengthening existing RC structures.

References

W. WENWEI and L. GUO, "Experimental study and analysis of RC beams strengthened with CFRP laminates under sustaining load," International Journal of Solids and Structures, vol. 43, no. 6, pp. 1372-1387, 2006/03/01/ 2006, doi: https://doi.org/10.1016/j.ijsolstr.2005.03.076.

A. AL-YOUSUF et al., "The Behavior of Reinforced Concrete Slabs Strengthened by Different Patterns and Percentages of Carbon Fiber-Reinforced Polymer (CFRP) Plate," Construction Materials, vol. 5, no. 2, p. 24, 2025. [Online]. Available: https://www.mdpi.com/2673-7108/5/2/24.

Y. GHERNOUTI, B. RABEHI, A. BENHAMNA, and A. HADJ MOSTEFA, "Strengthening of concrete beams by CFRP: Experimental study and finite element analysis," Journal of Building Materials and Structures, vol. 1, no. 2, pp. 47-57, 2014.

H. SINGHAL, "Finite Element Modeling of Retrofitted RC Beams," 2009.

C. BEDON, "Review on the use of FRP composites for facades and building skins," American Journal of Engineering and Applied Sciences, vol. 9, no. 3, pp. 713-723, 2016.

N. ARAVIND, A. K. SAMANTA, J. V. THANIKAL, and D. K. SINGHA ROY, "An experimental study on the effectiveness of externally bonded corrugated GFRP laminates for flexural cracks of RC beams," Construction and Building Materials, vol. 136, pp. 348-360, 2017/04/01/ 2017, doi: https://doi.org/10.1016/j.conbuildmat.2017.01.047.

Z. YAO, "Nonlinear finite element analysis of reinforced concrete beams," HKU Theses Online (HKUTO), 2013.

J. V. FRANK, "Nonlinear Finite Element Analysis of Reinforced Concrete Membranes," ACI Structural Journal, vol. 86, no. 1, 1/1/1989, doi: 10.14359/2620.

R. STRAMANDINOLI and H. L. ROVERE, "Finite element model for nonlinear analysis of reinforced concrete beams and plane frames," Revista IBRACON de Estruturas e Materiais, vol. 10, pp. 386-414, 2017.

M. CRISFIELD, "Finite elements in plasticity—theory and practice, DRJ Owen and E. Hinton, Pineridge Press, Swansea," ed: Wiley Online Library, 1981.

K. R. RAJAGOPAL, NONLINEAR ANALYSIS OF REINFORCED CONCRETE BEAMS, BEAM-COLUMNS AND SLABS BY FINITE ELEMENTS. Iowa State University, 1976.

C. JEYAMOHAN, "Non-linear finite element of analysis of reinforced concrete members," 1987.

D. NGO and A. C. SCORDELIS, "Finite element analysis of reinforced concrete beams," in Journal Proceedings, 1967, vol. 64, no. 3, pp. 152-163.

A. H. NILSON, "Nonlinear analysis of reinforced concrete by the finite element method," in Journal Proceedings, 1968, vol. 65, no. 9, pp. 757-766.

D. DUTHINH and M. A. STARNES, "Strengthening of reinforced concrete beams with carbon FRP," 2001.

Z. J. YANG, J. F. CHEN, and D. PROVERBS, "Finite element modelling of concrete cover separation failure in FRP plated RC beams," Construction and Building Materials, vol. 17, no. 1, pp. 3-13, 2003/02/01/ 2003, doi: https://doi.org/10.1016/S0950-0618(02)00090-9.

T. SUPAVIRIYAKIT, P. PORNPONGSAROJ, and A. PIMANMAS, "Finite element analysis of FRP-strengthened RC beams," Songklanakarin J. Sci. Technol, vol. 26, no. 4, pp. 497-507, 2004.

R. SANTHAKUMAR, E. CHANDRASEKARAN, and R. DHANARAJ, "Analysis of retrofitted reinforced concrete shear beams using carbon fiber composites," Electronic journal of structural engineering, vol. 4, pp. 66-74, 2004.

B. FERRACUTI, M. SAVOIA, and C. MAZZOTTI, "A numerical model for FRP–concrete delamination," Composites Part B: Engineering, vol. 37, no. 4, pp. 356-364, 2006/06/01/ 2006, doi: https://doi.org/10.1016/j.compositesb.2005.08.002.

B. GAO, C. K. Y. LEUNG, and J.-K. KIM, "Failure diagrams of FRP strengthened RC beams," Composite Structures, vol. 77, no. 4, pp. 493-508, 2007/02/01/ 2007, doi: https://doi.org/10.1016/j.compstruct.2005.08.003.

V. CERVENKA, L. JENDELE, and J. CERVENKA, "ATENA program documentation," Theory and User Manual, Cervenka Consulting, Prague, 2008.

V. ČERVENKA, J. ČERVENKA, Z. JANDA, and D. PRYL, "ATENA Program Documentation Part 8 User’s Manual for ATENA GiD Interface," Červenka Consulting, sro, Prague, 2019.

R. A. HAWILEH, M. Z. NASER, and J. A. ABDALLA, "Finite element simulation of reinforced concrete beams externally strengthened with short-length CFRP plates," Composites Part B: Engineering, vol. 45, no. 1, pp. 1722-1730, 2013/02/01/ 2013, doi: https://doi.org/10.1016/j.compositesb.2012.09.032.

V. CERVENKA, L. JENDELE, and J. CERVENKA, ATENA Program Documentation Part 1, ATENA theory manual. Prague, Czech Republic: Cervenka Consulting, 2012.

V. ČERVENKA, L. JENDELE, and J. ČERVENKA, "ATENA program documentation–Part 1," Cervenka Consulting sro, 2021.

M. CEB-FIP, "90, Design of concrete structures. CEB-FIP Model Code 1990," British Standard Institution, London, 1993.

Finite Element Modelling and Experimental Validation of CFRP-Strengthened Reinforced Concrete Beams

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