An experimental and numerical investigation on reinforced concrete beams damaged at different levels of shear damage and strengthening with CFRP sheets

Salih  Aslan; I. H. Erkan

doi:10.7764/RDLC.24.1.5

Authors

Salih Aslan Department of Civil Engineering, Konya Technical University, Konya (Turkey)
I. H. Erkan Department of Civil Engineering, Konya Technical University, Konya (Turkey)

DOI:

https://doi.org/10.7764/RDLC.24.1.5

Keywords:

Finite element method (FEM), carbon fiber reinforced polymer (CFRP), reinforced concrete (RC), predamaged concrete beam, shear beam.

Abstract

In this study, a series of investigations have been planned to examine the altered mechanical properties of reinforced concrete beams that have experienced different levels of shear damage under vertical loads, through the application of Carbon Fiber-Reinforced Polymer (CFRP) strengthening. Both experimental and numerical approaches will be utilized to analyze these effects comprehensively. Within the scope of this study, four reinforced concrete beams with rectangular cross-sections and inadequate shear strength were subjected to vertical loads. One of these beams was designated as the reference beam, while the other three beams were loaded to induce varying levels of damage, corresponding to 50%, 65%, and 85% of the reference beam's shear capacity. Subsequently, these beams were strengthening with CFRP strips at shear spans of 12.5/10 cm width and spacing. The experiments were then repeated with this strengthening. Models were created using the ABAQUS finite element program, considering support, load, and material conditions, to simulate the experiments accurately. At the conclusion of the study, the maximum load-carrying capacity obtained from the Finite Element Model (FEM) was found to be between 95% to 105% of the maximum experimental Load-Carrying Capacity (Pu). Additionally, the study demonstrated that the crack mechanisms occurring in the beams during the experiments were in perfect agreement with those predicted by the finite element analysis.

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References

Aksoylu C, Özkılıç Y. O, Arslan M. H (2022) Mechanical steel stitches: an innovative approach for strengthening shear deficiency in undamaged reinforced concrete beams. Buildings 12: 1501.

Aksoylu, C, Şakir Y, Özkılıç Y. O, Gemi L, Arslan M. H (2020) Experimental analysis of reinforced concrete shear deficient beams with circular web openings strengthened by CFRP composite. Composite Structures 249: 112561.

Al Hasani S, Nasrellah HA, Abdulraeg A (2021) Numerical study of reinforced Concrete beam by using Abaqus software. International Journal of Innovative Technology and Interdisciplinary Sciences 4: 733-41.

Alam M. D. A, Onik S. A, Mustapha K. N. B (2020) Crack based bond strength model of externally bonded steel plate and CFRP laminate to predict debonding failure of shear strengthened RC beams. Journal of Building Engineering 27: 100943.

Al-Rousan R. Z (2021) Integration of CFRP strips as an internal shear reinforcement in reinforced concrete beams exposed to elevated temperature. Case Studies in Construction Materials 14: e00508.

Al-Saawani, M. A., El-Sayed, A. K., & Al-Negheimish, A. I. (2020) Effect of shear-span/depth ratio on debonding failures of FRP-strengthened RC beams. Journal of Building Engineering, 32: p. 101771.

Alshlash S (2019) Betonarme kirişlerde onarım ve güçlendirme yöntemlerinin deneysel olarak irdelenmesi ve maliyet analizi', MSc Thesis Konya Teknik Üniversitesi Konya, Turkey.

Altoubat S, Karzad A. S, Maalej M, Barakat S, Junaid T (2020). "Experimental study of the steel/CFRP interaction in shear-strengthened RC beams incorporating macro-synthetic fibers. Structures, 88-98. Elsevier.

American Concrete Institute (ACI). (2006). “Guide for the design and construction of structural concrete reinforced with FRP bars.” ACI 440.1R-06, Detroit.

Arslan M. H, Aksoylu C, Gemi L, Yazman Ş, Özkılıç Y. Ö (2019) Effect of circular holes in shear region on the behavior of CFRP strengthened RC beams. 4th Eurasian Conference on Civil and Environmental Engineering (ECOCEE), İstanbul, Turkey

Arslan M. H, Yazman Ş, Hamad A A, Aksoylu C, Özkılıç YO, Gemi L (2022) Shear strengthening of reinforced concrete T-beams with anchored and non-anchored CFRP fabrics. Structures, 527-42.

Arundhavapriya, E, Mohanraj N, Sarathkumar D (2022) A study on concrete beam with profiled reinforcement', Materials Today Proceedings 52: 2073-80.

Askar M. K, Hassan A. F, Al-Kamaki Y. S. S (2022) Flexural and shear strengthening of reinforced concrete beams using FRP composites: A state of the art. Case Studies in Construction Materials; e01189.

Aslan, S., Erkan, İ. H., Aksoylu, C., & Arslan, M. H. (2024). An experimental investigation and cost analysis of flexural or shear strengthening pre-damaged RC beams. In Structures (Vol. 62, p. 106091). Elsevier.‏

Chalioris C. E, Kytinou V. K, Voutetaki ME, Papadopoulos N (2019) Repair of heavily damaged RC beams failing in shear using U-shaped mortar jackets. Buildings 9: 146.

Dere, Y. (2017). Assessing a retrofitting method for existing RC buildings with low seismic capacity in Turkey. Journal of Performance of Constructed Facilities, 31(2), 04016098.‏

Erdem, R. T. (2022). Experimental and numerical study of fiber reinforced concrete beams in four-point bending. Cement-Wapno-Beton= Cement Lime Concrete, 26(5), 431-443.‏

Fayyadh M. M, Razak H. A (2022). 'Impact of design parameters and cycles of damage loads on CFRP repair effectiveness of shear-deficient RC structures. Construction and Building Materials 347: 128465.

Fujikake K, Senga T, Ueda N, Ohno T, Katagiri M (2006) Study on impact response of reactive powder concrete beam and its analytical model. Journal of Advanced Concrete Technology 4: 99-108.

Ganesh P, Murthy A. R (2021) Analytical model to predict the fatigue life of damaged RC beam strengthened with GGBS based UHPC. Structures, 2559-69. Elsevier.

Gemi L, Alsdudİ M, Aksoylu C, Yazman Ş, Özkılıç Y. O, Steel Arslan M H. (2022) Optimum amount of CFRP for strengthening shear deficient reinforced concrete beams'. Steel and Composite Structures 1229-9367, 735-757

Hamoda A, Ahmed M, Sennah K. 2022. 'Experimental and numerical investigations of the effectiveness of engineered cementitious composites and stainless steel plates in shear strengthening of reinforced concrete beams'. Structural Concrete

Jahani Y, Baena M, Barris C, Torres L, Sena-Cruz J. (2022) 'Effect of fatigue loading on flexural performance of NSM CFRP-strengthened RC beams under different service temperatures', Engineering Structures 273: 115119.

Jasim W. A, Abu Tahnat Y. B, Halahla AM ( 2020) Behavior of reinforced concrete deep beam with web openings strengthened with (CFRP) sheet. Structures, 785-800. Elsevier.

Jirawattanasomkul T, Likitlersuang S, Wuttiwannasak N, Ueda T, Zhang D, Shono M. (2020) 'Structural behaviour of pre-damaged reinforced concrete beams strengthened with natural fiber reinforced polymer composites', Composite Structures 244: 112309.

Jurayevich, R. S, Shukirillayevich M. A (2022). 'Calculation of strength of fiber reinforced concrete beams using abaqus software', The Peerian Journal 2788-0303 5: 20-26.

Karzad A. S, Leblouba M, Al Toubat S, Maalej M. (2019). 'Repair and strengthening of shear-deficient reinforced concrete beams using Carbon Fiber Reinforced Polymer', Composite Structures 223: 110963.

Lee SH, Abolmaali A, Shin KJ, Lee HD. (2020). 'ABAQUS modeling for post-tensioned reinforced concrete beams', Journal of Building Engineering 30: 101273.

Mabrouk A. G, Ramadan O. M (2017) "Finite element modeling of RC beams shear-strengthened with side bonded CFRP sheets." In APFIS2017–6th Asia-Pacific Conference on FRP in Structures. Singapore

Mac Gregor, J. G., (1997). “Reinforced concrete: mechanics and design”, 3rd Ed., Vol: 13. Upper Saddle River, NJ: Prentice Hall.

Mater, Y. M., Elansary, A. A., & Abdalla, H. A. (2025). Experimental and numerical investigation of preloaded recycled concrete beams strengthened with CFRP. World Journal of Engineering, 22(2), 285-306.

Mohammed J. A, Moatasem M. F, Omar R. K (2021) Effect of web opening diameter on performance and failure mode of CFRP repaired RC beams. Materials Today Proceedings 42: 388-98,

Mohammed M. A. M (2022) 'Numerical Evaluation of Pre-Damaged Beam Using Recycled Concrete Aggregate Strengthened by FRP Sheets', MSc Thesis, The British University, Dubai AUE

Naser M. Z, Hawileh R. A, Abdalla J (2021) 'Modeling strategies of finite element simulation of reinforced concrete beams strengthened with FRP: A review', Journal of Composites Science 5: 19.

Obaidat Y. T, Barham W S, Aljarah A H (2020) 'New anchorage technique for NSM-CFRP flexural strengthened RC beam using steel clamped end plate', Construction Building Materials 263: 120246.

Orman Subasi, R., Caglar, N., Demirtas, G., & Ozturk, H. (2024). Nonlinear finite element study on the improvement of torsional strengthening of RC beams with diagonal shear reinforcement. Revista de la Construcción, 23(3), 480-496.

Özkılıç Y. O, Aksoylu C, Arslan M. H, Gemi L (2021) 'Numerical investigation of the parameters influencing the behavior of dapped end prefabricated concrete purlins with and without CFRP strengthening', Construction and Building Materials 275: 122173.

Özkılıç Y. O, Aksoylu C, Gemi L, Arslan M. H (2022) "Behavior of CFRP-strengthened RC beams with circular web openings in shear zones: Numerical study." Structures, 1369-89. Elsevier.

Pourbaba, M., Joghataie, A., & Mirmiran, A. (2018) Shear behavior of ultra-high performance concrete. Construction and Building Materials, 183: p. 554-564.

Prado D. M, Araujo I. D. G, Haach VG, Carrazedo R (2016) 'Assessment of shear damaged and NSM CFRP retrofitted reinforced concrete beams based on modal analysis', Engineering Structures 129: 54-66.

Raza S, Khan M. K, Menegon S. J, Tsang H. H, Wilson J. L (2019) 'Strengthening and repair of reinforced concrete columns by jacketing: State-of-the-art review', Sustainability 11: 3208.

Rogowski J, Kotynia R (2022) 'Comparison of prestressing methods with CFRP and SMA Materials in Flexurally Strengthened RC members', Materials 15: 1231.

Sakbana A, Mashreib M (2020) 'Finite element analysis of CFRP-Reinforced Concrete Beams Análisis de elementos finitos de Vigas de Hormigón Armado CFRP'. Revista Ingeniería de Construcción 0718-5073

Sammen S. S, Ahmed Q. W, Al-Karawi S. N (2019) "Nonlinear Finite Element Analysis of Concrete Beam Reinforced with Fiber Reinforced Polymer (FRM)." 2nd International Conference on Sustainable Engineering Techniques (ICSET 2019), IOP Publishing

Serdar A. H, Demirtaş G, Sarıbıyık M, Çağlar N (2020). 'Eğilme etkisi altındaki lifli betonarme kirişlerin doğrusal olmayan analizi', Academic Perspective Procedia 3: 976-82.

Shadmand M, Hedayatnasab A, Kohnehpooshi O (2022) 'Strengthening of RC beams using steel plate-fiber concrete composite jackets (finite element simulation and experimental investigation)', International Journal of Engineering 35: 73-92.

Soleimani S. M, Roudsari S. S (2019) 'Analytical study of reinforced concrete beams tested under quasi-static and impact loadings', Applied Sciences 9: 2838.

Standard, Abaqus. (1995). User's manual. Hibbitt, Karlsson & Sorensen, Pawtucket.‏

Sümer Y, Aktas M. (2011) 'Betonarme kirişlerin doğrusal olmayan sonlu elemanlar modellemesinde çözüm aği sikliği etkisinin incelenmesy', Engineering Sciences 1306-3111 6: 216-24.

TBDY (2018). Turkey Disaster and Emergency Management Presidency. Turkey Building Earthquake Regulation (Türkiye Bina Deprem Yönetmeliği). Turkish Standards Institute. Ankara, Türkiye.

Yan Y, Lu Y, Zhao Q, Li S (2023) 'Flexural behavior of pre-damaged and repaired reinforced concrete beams with carbon fiber reinforced polymer grid and engineered cementitious composite', Engineering Structures 277: 115390.

Yang, Y., Chen, X., Xue, Y., & Yu, Y. (2022) Experimental investigation on shear performance of reinforced concrete beams retrofitted by pre-stressed steel strips. in Structures. Elsevier. p. 767-778.

Yılmaz, T., Erdem, R. T., Kıshı, N., & Anıl, Ö. (2024). Investigation of impact behavior of shear deficient RC beams using nonlinear FEA. Mechanics Based Design of Structures and Machines, 52(2), 848-866.‏

Yu F, Zhou H, Jiang N, Fang Y, Song J, Feng C, Guan Y (2020) 'Flexural experiment and capacity investigation of CFRP repaired RC beams under heavy pre-damaged level', Construction and Building Materials 230: 117030.

Yuan F, Chen M, Pan J (2020) 'Flexural strengthening of reinforced concrete beams with high-strength steel wire and engineered cementitious composites', Construction and Building Materials 254: 119284.

Zhao J, Liu P. F, Xu Y. Y (2020) "An internal damage real-time monitoring system using CFRP-OFBG plates." Key Engineering Materials, 47-52. Trans Tech Publ. Tokyo, Japan

Zhou, L., & Wan, S. (2022) Shear behavior of UHPC beams with small shear span to depth ratios based on MSTM. Case Studies in Construction Materials, 16: p. e01134.