Experimental Study on the Flexural Behavior of Large-Scale Reinforced Concrete Beams Strengthened with Prestressed CFRP Plates
Publication: Journal of Composites for Construction
Volume 26, Issue 6
Abstract
Carbon fiber–reinforced polymer (CFRP) systems have been widely used to strengthen concrete structures. To further study the flexural strengthening of concrete beams with prestressed CFRP plates, flexural tests of large-scale reinforced concrete beams were performed, and a tensioning and anchorage system suitable for engineering applications was used in this study. The effects of the prestressing level, strengthening amount, type, and bonding position of the prestressed CFRP plate on the flexural behavior were investigated. The test results showed that the cracking load, yielding load, and ultimate load of all prestressed strengthened beams could reach 2.25–3.38 times, 1.27–1.53 times, and 1.24–1.61 times those of the unstrengthened beam, respectively. The postcracking stiffness, cracking load, and yielding load could be increased by increasing the prestressing level and strengthening the amount of the prestressed CFRP plate. However, a high prestressing level of 50% could lead to a premature intermediate debonding of the CFRP plate before yielding of the steel reinforcements and a reduction in the ultimate load. The use of a low-strength prestressed CFRP plate could achieve a strengthening efficacy similar to that of a high-strength CFRP plate before yielding of the steel reinforcements, whereas the low-strength CFRP plate reduced the ultimate load by 25 kN compared with the high-strength one. The prestressed CFRP plate bonded on the two sides provided a lower flexural strengthening efficacy than that bonded on the bottom of the beam owing to the shorter force arm and the nonuniform stress of the side-bonded CFRP plate.
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Acknowledgments
The authors would like to acknowledge the financial support from the CSCEC Technology R&D Program (CSCEC-2020-Z-1), the Fundamental Research Funds for the Central Universities (B220202015), the China Postdoctoral Science Foundation (2019M651675), and the Shanghai Science and Technology Program (20DZ2253000). The authors also acknowledge Tianjin Carbon Technology Group Co., Ltd. of China for providing the anchorage system.
References
AQSIQ (General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China). 2018. Steel for the reinforcement of concrete—Part 2: Hot rolled ribbed bars. [In Chinese.] GT1499.2-2018. Beijing: AQSIQ.
AQSIQ (General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China). 2014. Test method for tensile properties of orientation fiber reinforced polymer matrix composite materials. [In Chinese.] GT3354-2014. Beijing: AQSIQ.
Aslam, M., P. Shafigh, M. Z. Jumaat, and S. N. R. Shah. 2015. “Strengthening of RC beams using prestressed fiber reinforced polymers—A review.” Constr. Build. Mater. 82: 235–256. https://doi.org/10.1016/j.conbuildmat.2015.02.051.
Bakis, C. E., L. C. Bank, V. L. Brown, E. Cosenza, J. F. Davalos, J. J. Lesko, A. Machida, S. H. Rizkalla, and T. C. Triantafillou. 2002. “Fiber-Reinforced polymer composites for construction—State-of-the-art review.” J. Compos. Constr. 6: 73–87. https://doi.org/10.1061/(ASCE)1090-0268(2002)6:2(73).
Correia, L., T. Teixeira, J. Michels, J. A. P. P. Almeida, and J. Sena-Cruz. 2015. “Flexural behaviour of RC slabs strengthened with prestressed CFRP strips using different anchorage systems.” Composites, Part B 81: 158–170. https://doi.org/10.1016/j.compositesb.2015.07.011.
Deng, J., K. Rashid, X. Li, Y. Xie, and S. Chen. 2021. “Comparative study on prestress loss and flexural performance of rectangular and T beam strengthened by prestressing CFRP plate.” Compos. Struct. 262: 113340. https://doi.org/10.1016/j.compstruct.2020.113340.
El-Hacha, R., R. G. Wight, and M. F. Green. 2001. “Prestressed fibre-reinforced polymer laminates for strengthening structures.” Prog. Struct. Mater. Eng. 3 (2): 111–121. https://doi.org/10.1002/pse.76.
Feng, P., and L. Hu. 2019. “Steel columns strengthened/reinforced by prestressed CFRP strips: Concepts and behaviors under axial compressive loads.” Compos. Struct. 217: 150–164. https://doi.org/10.1016/j.compstruct.2019.03.038.
Fu, B., J. G. Teng, J. F. Chen, G. M. Chen, and Y. C. Guo. 2017. “Concrete cover separation in FRP-plated RC beams: Mitigation using FRP U-Jackets.” J. Compos. Constr. 21: 04016077. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000721.
Gao, P., X. Gu, and A. S. Mosallam. 2016. “Flexural behavior of preloaded reinforced concrete beams strengthened by prestressed CFRP laminates.” Compos. Struct. 157: 33–50. https://doi.org/10.1016/j.compstruct.2016.08.013.
Garden, H. N., L. C. Hollaway, and A. M. Thorne. 1998. “The strengthening and deformation behaviour of reinforced concrete beams upgraded using prestressed composite plates.” Mater. Struct. 31 (4): 247–258. https://doi.org/10.1007/BF02480423.
Hollaway, L. C. 2010. “A review of the present and future utilisation of FRP composites in the civil infrastructure with reference to their important in-service properties.” Constr. Build. Mater. 24 (12): 2419–2445. https://doi.org/10.1016/j.conbuildmat.2010.04.062.
Kalfat, R., R. Al-Mahaidi, and S. T. Smith. 2013. “Anchorage devices used to improve the performance of reinforced concrete beams retrofitted with FRP composites: State-of-the-art review.” J. Compos. Constr. 17 (1): 14–33. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000276.
Kim, Y. J., R. G. Wight, and M. F. Green. 2008. “Flexural strengthening of RC beams with prestressed CFRP sheets: Development of nonmetallic anchor systems.” J. Compos. Constr. 12 (1): 35–43. https://doi.org/10.1061/(ASCE)1090-0268(2008)12:1(35).
Liu, C., X. Wang, J. Shi, L. Liu, and Z. Wu. 2021. “Experimental study on the flexural behavior of RC beams strengthened with prestressed BFRP laminates.” Eng. Struct. 233: 111801. https://doi.org/10.1016/j.engstruct.2020.111801.
MHURD (Ministry of Housing and Urban–Rural Development of the People’s Republic of China). 2010. Code for design of concrete structures. [In Chinese.] GB50010-2010. Beijing: MHURD.
MHURD. 2013. Code for design of strengthening concrete structures. [In Chinese.] GB50367-2013. Beijing: MHURD.
MHURD. 2016. Standard for test method of mechanical properties on ordinary concrete. [In Chinese.] GB/T50081-2016. Beijing: MHURD.
Michels, J., J. Sena-Cruz, C. Czaderski, and M. Motavalli. 2013. “Structural strengthening with prestressed CFRP strips with gradient anchorage.” J. Compos. Constr. 17 (5): 651–661. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000372.
Michels, J., M. Staskiewicz, C. Czaderski, R. Kotynia, Y. E. Harmanci, and M. Motavalli. 2016. “Prestressed CFRP strips for concrete bridge girder retrofitting: Application and static loading test.” J. Bridge Eng. 21 (5): 04016003. https://doi.org/10.1061/(ASCE)BE.1943-5592.0000835.
Mostafa, A., and A. G. Razaqpur. 2013. “CFRP anchor for preventing premature debonding of externally bonded FRP laminates from concrete.” J. Compos. Constr. 17 (5): 641–650. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000377.
Motavalli, M., C. Czaderski, and K. Pfyl-Lang. 2011. “Prestressed CFRP for strengthening of reinforced concrete structures: Recent developments at Empa, Switzerland.” J. Compos. Constr. 15: 194–205. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000125.
Piatek, B., T. Siwowski, J. Michalowski, and S. Blazewicz. 2020. “Flexural strengthening of RC beams with prestressed CFRP strips: Development of novel anchor and tensioning system.” J. Compos. Constr. 24 (3): 04020015. https://doi.org/10.1061/(ASCE)CC.1943-5614.0001020.
Rashid, K., X. Li, J. Deng, Y. Xie, Y. Wang, and S. Chen. 2019. “Experimental and analytical study on the flexural performance of CFRP-strengthened RC beams at various pre-stressing levels.” Compos. Struct. 227: 111323. https://doi.org/10.1016/j.compstruct.2019.111323.
Saadatmanesh, H., and M. R. Ehsani. 1991. “RC beams strengthened with GFRP plates. I: Experimental study.” J. Struct. Eng. 117 (11): 3417–3433. https://doi.org/10.1061/(ASCE)0733-9445(1991)117:11(3417).
SECQMA (Shanghai Engineering Construction Quality Management Association). 2022. Standard for construction and acceptance of strengthening with prestressed carbon fiber reinforced polymer plate. [In Chinese.] T/SCQA 212-2021. Shanghai, China: SECQMA.
Siwowski, T., B. Piątek, P. Siwowska, and A. Wiater. 2020. “Development and implementation of CFRP post-tensioning system for bridge strengthening.” Eng. Struct. 207: 110266. https://doi.org/10.1016/j.engstruct.2020.110266.
Smith, S. T., H. Zhang, and Z. Wang. 2013. “Influence of FRP anchors on the strength and ductility of FRP-strengthened RC slabs.” Constr. Build. Mater. 49: 998–1012. https://doi.org/10.1016/j.conbuildmat.2013.02.006.
Tehrani, B. N., D. Mostofinejad, and S. M. Hosseini. 2019. “Experimental and analytical study on flexural strengthening of RC beams via prestressed EBROG CFRP plates.” Eng. Struct. 197: 109395. https://doi.org/10.1016/j.engstruct.2019.109395.
Torres-Acosta, A. A. 2002. “Galvanic corrosion of steel in contact with carbon-polymer composites. I: Experiments in mortar.” J. Compos. Constr. 6 (2): 112–115. https://doi.org/10.1061/(ASCE)1090-0268(2002)6:2(112).
Triantafillou, T. C., N. Deskovic, and M. Deuring. 1992. “Strengthening of concrete structures with prestressed fiber-reinforced plastic sheets.” ACI Struct. J. 89 (3): 235–244.
Wang, H.-T., S.-S. Liu, Q.-L. Liu, Y.-Y. Pang, and J.-W. Shi. 2021. “Influences of the joint and epoxy adhesive type on the CFRP-steel interfacial behavior.” J. Build. Eng. 43: 103167. https://doi.org/10.1016/j.jobe.2021.103167.
Wang, H.-T., and G. Wu. 2018. “Bond-slip models for CFRP plates externally bonded to steel substrates.” Compos. Struct. 184: 1204–1214. https://doi.org/10.1016/j.compstruct.2017.10.033.
Wang, W.-W., J.-G. Dai, K. A. Harries, and Q.-H. Bao. 2012. “Prestress losses and flexural behavior of reinforced concrete beams strengthened with posttensioned CFRP sheets.” J. Compos. Constr. 16 (2): 207–216. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000255.
Wei, Y., J. Bai, Y. Zhang, K. Miao, and K. Zheng. 2021. “Compressive performance of high-strength seawater and sea sand concrete-filled circular FRP–steel composite tube columns.” Eng. Struct. 240 (8): 112357. https://doi.org/10.1016/j.engstruct.2021.112357.
Wu, C., Y.-Z. Yu, L. Tam, J. Orr, and L. He. 2021. “Effect of glass fiber sheet in adhesive on the bond and galvanic corrosion behaviours of CFRP-Steel bonded system.” Compos. Struct. 259: 113218. https://doi.org/10.1016/j.compstruct.2020.113218.
Wu, Y.-F., and Y. Huang. 2008. “Hybrid bonding of FRP to reinforced concrete structures.” J. Compos. Constr. 12 (3): 266–273. https://doi.org/10.1061/(ASCE)1090-0268(2008)12:3(266).
Yang, D.-S., S.-K. Park, and K. W. Neale. 2009. “Flexural behaviour of reinforced concrete beams strengthened with prestressed carbon composites.” Compos. Struct. 88 (4): 497–508. https://doi.org/10.1016/j.compstruct.2008.05.016.
Yang, J., M. Johansson, M. Al-Emrani, and R. Haghani. 2021. “Innovative flexural strengthening of RC beams using self-anchored prestressed CFRP plates: Experimental and numerical investigations.” Eng. Struct. 243: 112687. https://doi.org/10.1016/j.engstruct.2021.112687.
You, Y.-C., K.-S. Choi, and J. Kim. 2012. “An experimental investigation on flexural behavior of RC beams strengthened with prestressed CFRP strips using a durable anchorage system.” Composites, Part B 43 (8): 3026–3036. https://doi.org/10.1016/j.compositesb.2012.05.030.
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Published In
Journal of Composites for Construction
Volume 26 • Issue 6 • December 2022
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© 2022 American Society of Civil Engineers.
History
Received: Dec 15, 2021
Accepted: Jul 18, 2022
Published online: Oct 5, 2022
Published in print: Dec 1, 2022
Discussion open until: Mar 5, 2023
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