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http://dx.doi.org/10.12989/acc.2022.13.4.307

An experimental investigation of the flexural strengthening of preloaded self-compacted RC beams using CFRP sheets and laminates composites  

Lattif, Youssef (Department of Structural Engineering, Zagazig University)
Hamdy, Osman (Department of Civil Engineering, Zagazig Higher Institute of Engineering and Technology)
Publication Information
Advances in concrete construction / v.13, no.4, 2022 , pp. 307-313 More about this Journal
Abstract
This paper performs an experimental study on the flexural behavior of preloaded reinforced self-compacted concrete beams strengthened with carbon fiber reinforced polymers CFRP. A group of six preloaded strengthened beams was investigated along with one unstrengthened beam used as a reference beam RB. All beams have the same dimensions and reinforcement details: three beams are strengthened with CFRP laminates against flexural failure and three beams are strengthened with CFRP sheets. For simulating actual conditions, the beams are loaded before strengthening. Then, after strengthening, the beams are tested for flexural strength using 4-point loads where cracked and ultimate load and failure mode, along with load-deflection relation are recorded. To study the different configurations of strengthening, one layer, two layers, and U-wrap formation of laminates and sheets are considered. The results show that strengthing the RC beams using CFRP is an effective method to increase the beam's capacity by 47% up to 153% where deflection is reduced by 5%-80%. So, the beams strengthened with CFRP laminates have higher load capacity and lower ductility in comparison with the beams strengthened with CFRP sheets.
Keywords
CFRP laminated; CFRP sheets; flexural strengthening; preloading; RC beam; self-compacted concrete;
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Times Cited By KSCI : 6  (Citation Analysis)
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1 Hamed, A.A.A., El-kashif, K.F.O. and Salem, H.M. (2019), "Flexural strengthening of preloaded reinforced concrete continuous beams: An experimental investigation", Alexandria Eng. J., 58(1), 207-216. https://doi.org/10.1016/j.aej.2018.11.011.   DOI
2 Moein, R.S. and Tasnimi, A.A. (2016), "An analytical model for FRP debonding in strengthened RC beams under monotonic and cyclic loads", Int. J. Concrete Struct. Mater., 10(4), 499-511. https://doi.org/10.1007/s40069-016-0172-5.   DOI
3 Abderezak, R., Tahar, H.D., Rabia, B. and Tounsi, A. (2021), "Mechanical behavior of RC cantilever beams strengthened with FRP laminate plate", Adv. Comput. Des., 6(3), 169-190. https://doi.org/https://doi.org/10.12989/acd.2021.6.3.169.   DOI
4 Abu Maraq, M.A., Tayeh, B.A., Ziara, M.M. and Alyousef, R. (2021), "Flexural behavior of RC beams strengthened with steel wire mesh and self-compacting concrete jacketing-Experimental investigation and test results", J. Mater. Res. Tech., 10, 1002-1019. https://doi.org/10.1016/j.jmrt.2020.12.069.   DOI
5 ASTM C 494. (2001), Standard Specification for Chemical Admixtures for Concrete, Annual Book of ASTM Standards. 9.
6 Attari, N., Amziane, S. and Chemrouk, M. (2012), "Flexural strengthening of concrete beams using CFRP, GFRP and hybrid FRP sheets", Constr. Build. Mater., 37, 746-757. https://doi.org/10.1016/j.conbuildmat.2012.07.052.   DOI
7 Fayyadh, M.M. and Abdul Razak, H. (2012), "Assessment of effectiveness of CFRP repaired RC beams under different damage levels based on flexural stiffness", Constr. Build. Mater., 37, 125-134. https://doi.org/10.1016/j.conbuildmat.2012.07.021.   DOI
8 Camata, G., Spacone, E. and Zarnic, R. (2007), "Experimental and nonlinear finite element studies of RC beams strengthened with FRP plates", Compos. Part B Eng., 38(2), 277-288. https://doi.org/10.1016/j.compositesb.2005.12.003.   DOI
9 Isleem, H.F., Tayeh, B.A., Alaloul, W.S., Musarat, M.A. and Raza, A. (2021), "Artificial Neural Network (ANN) and Finite Element (FEM) models for GFRP-Reinforced concrete columns under axial compression", Mater., 14(23), 7172. https://doi.org/10.3390/ma14237172.   DOI
10 Chajes, M.J., Thomson, T.A., Januszka, T.F. and Finch, W.W. (1994), "Flexural strengthening of concrete beams using externally bonded composite materials", Constr. Build. Mater., 8(3), 191-201. https://doi.org/10.1016/S0950-0618(09)90034-4.   DOI
11 Ganesan, N., Bindurania, P. and Indira, P.V. (2020), "Flexural strengthening of RCC beams using FRPs and ferrocement-A comparative study", Adv. Concrete Constr., 10(1), 35-48. https://doi.org/https://doi.org/10.12989/acc.2020.10.1.035.   DOI
12 Isleem, H.F., Peng, F. and Tayeh, B.A. (2022), "Confinement model for LRS FRP-confined concrete using conventional regression and artificial neural network techniques", Compos. Struct., 279, 114779. https://doi.org/10.1016/j.compstruct.2021.114779.   DOI
13 Kim, H.S. and Shin, Y.S. (2011), "Flexural behavior of reinforced concrete (RC) beams retrofitted with hybrid fiber reinforced polymers (FRPs) under sustaining loads", Compos. Struct., 93(2), 802-811. https://doi.org/10.1016/j.compstruct.2010.07.013.   DOI
14 James H. Haido, M.A.Z. and B.A.T. (2021), "Experimental and numerical studies on flexural behavior of high strength concrete beams containing waste glass", Adv. Concrete Constr., 11(3), 239-253. https://doi.org/https://doi.org/10.12989/acc.2021.11.3.239.   DOI
15 Kamal, M.M., Safan, M.A., Etman, Z.A. and Kasem, B.M. (2014), "Mechanical properties of self-compacted fiber concrete mixes", HBRC J., 10(1), 25-34. https://doi.org/10.1016/j.hbrcj.2013.05.012.   DOI
16 Kar, S. and Biswal, K.C. (2020), "Shear strengthening of reinforced concrete T-beams by using fiber-reinforced polymer composites: A data analysis", Arab. J. Sci. Eng., 45(5), 4203-4234. https://doi.org/10.1007/s13369-020-04412-x.   DOI
17 Kishore, R., Nasiry, N.Z. and Rujhan, M. (2016), "Strengthening of reinforced concrete beams using CFRP laminates", 17, 159-167.
18 Li, G., Zhang, A. and Guo, Y. (2015), "Effect of preload level on flexural load-carrying capacity of RC beams strengthened by externally bonded FRP sheets", Open Civil Eng. J., 9(1), 426-434. https://doi.org/10.2174/1874149501509010426.   DOI
19 Tayeh, B.A., Bakar, B.H.A., Megat Johari, M.A. and Zeyad, A.M. (2013), "Flexural strength behavior of composite UHPFC-Existing concrete", Adv. Mater. Res., 701, 32-36. https://doi.org/10.4028/www.scientific.net/AMR.701.32.   DOI
20 Tayeh, B.A., Abu Maraq, M.A. and Ziara, M.M. (2020), "Flexural performance of reinforced concrete beams strengthened with self-compacting concrete jacketing and steel welded wire mesh", Struct., 28, 2146-2162. https://doi.org/10.1016/j.istruc.2020.10.035.   DOI
21 Smith, S. and Teng, J. (2002), "FRP-strengthened RC beams. I: Review of debonding strength models", Eng. Struct., 24(4), 385-395. https://doi.org/10.1016/S0141-0296(01)00105-5.   DOI
22 Mashrei, M.A., Makki, J.S. and Sultan, A.A. (2019), "Flexural strengthening of reinforced concrete beams using Carbon Fiber Reinforced Polymer (CFRP) sheets with grooves", Latin Am. J. Solid. Struct., 16(4), 2019. https://doi.org/10.1590/1679-78255514.   DOI
23 Okamura, H. and Ozawa, K. (1996), "Self-Compacting high performance concrete", Struct. Eng. Int., 6(4), 269-270. https://doi.org/10.2749/101686696780496292.   DOI
24 Belarbi, A. and Acun, B. (2013), "FRP systems in shear strengthening of reinforced concrete structures", Procedia Eng., 57, 2-8. https://doi.org/10.1016/j.proeng.2013.04.004.   DOI
25 Fayyadh, M.M. (2021), "Modified models to predict the ultimate flexural and shear capacities of CFRP repaired RC beams", Coupl. Syst. Mech., 6(2), 99-115. https://doi.org/https://doi.org/10.12989/acd.2021.6.2.099.   DOI
26 Halim, N.H.F.A., Alih, S.C. and Vafaei, M. (2021), "Seismic behavior of RC columns internally confined by CFRP strips", Adv. Concrete Constr., 12(3), 217-225. https://doi.org/https://doi.org/10.12989/acc.2021.12.3.217.   DOI
27 Wenwei, W. and Guo, L. (2006), "Experimental study and analysis of RC beams strengthened with CFRP laminates under sustaining load", Int. J. Solid. Struct., 43(6), 1372-1387. https://doi.org/10.1016/j.ijsolstr.2005.03.076.   DOI
28 Ou, J. and Shao, Y. (2021), "Compressive strength of circular concrete filled steel tubular stubs strengthened with CFRP", Steel Compos. Struct., 39(2), 189-200. https://doi.org/https://doi.org/10.12989/scs.2021.39.2.189.   DOI
29 Siddika, A., Al Mamun, M.A., Alyousef, R. and Amran, Y.M. (2019), "Strengthening of reinforced concrete beams by using fiber-reinforced polymer composites: A review", J. Build. Eng., 25, 100798. https://doi.org/10.1016/j.jobe.2019.100798.   DOI
30 Tahsiri, H., Sedehi, O., Khaloo, A. and Raisi, E.M. (2015), "Experimental study of RC jacketed and CFRP strengthened RC beams", Constr. Build. Mater., 95, 476-485. https://doi.org/10.1016/j.conbuildmat.2015.07.161.   DOI