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  • Date of Publication : 2023-12-13 Article Type : Research Article
  • Shear Strengthening of Reinforced Concrete Beams Using CFRP Strips

    Ari Omar Ismael ¹* and  Ali Ramadhan Yousif ² 

    Affiliation

    ¹,² Department of Civil Engineering, College of Engineering, Salahaddin University, Erbil-IRAQ
    *Corresponding Author


    ORCID :

    Ari Omar : https://orcid.org/0009-0002-0605-0319, Ali Ramadhan: https://orcid.org/0000-0003-3968-6348


    DOI :

    https://doi.org/10.23918/eajse.v9i3p01


    Article History

    Received: 2023-07-22

    Revised: 2023-09-08

    Accepted: 2023-09-14

    Abstract

    In this study, the shear strengthening of reinforced concrete (RC) beams by externally web-side bonded carbon fiber-reinforced polymer (CFRP) strips is investigated experimentally. The current study regards the problems associated with shear strengthening of RC beams without stirrups by using externally bonded CFRP strips on two opposing web sides of the beam and four ratios of longitudinal reinforcements were used as the test variables. To investigate the shear capacity of RC beams, a total of eight 130 mm x 250 mm x 2,400 mm RC beams without shear reinforcement were used. Parameters varied in the tests and included a ratio of longitudinal reinforcement (1.24%, 1.86%, 2.47%, and 3.09%) and vertical application of CFRP strips. Considering the experiment's findings, the capacity of RC beams strengthened in shear with externally bonded web-sided CFRP strips is 1.88-1.95 times greater than that of control beams. It was revealed that the longitudinal reinforcement ratio significantly influences the failure type and crack patterns in the shear span zone. With an increasing longitudinal reinforcement ratio, the shear capacity of the beam increased slightly.

    Keywords :

    Reinforced Concrete Beam; Carbon Fiber-Reinforced Polymer; Shear Strengthening; Shear Capacity; Diagonal Cracking.


    [1]    Hollaway L. C. Key Issues in the use of Fiber Reinforced Polymer (FRP) Composites in Rehabilitation and Retroffiting of Concrete Structures. Woodhead Publishing Series in Civil and Structural Engineering. 2011; 3-74. https://doi.org/10.1533/9780857090928.1.3

    Google Scholar
    [2]    Bukhari I. A., Vollum R. L., Ahmad S. and Sagaseta J. Shear strengthening of reinforced concrete beams with CFRP. Magazine of Concrete Research. 2010; 62(1): 65-77. https://doi.org/10.1680/macr.2008.62.1.65

    Google Scholar
    [3]    Zhang Z., and Thomas C. Shear Strengthening of Reinforced Concrete Deep Beams Using Carbon Fiber Reinforced Polymer Laminates. Journal of Composites for Construction. 2005; 9(2):  158–169. https://doi.org/10.1061/(ASCE)1090-0268(2005)9:2(158)

    Google Scholar
    [4]    Bukhari I. A., Vollum R. L., Ahmad S. and Sagaseta J. Shear strengthening of short span reinforced concrete beams with CFRP sheets. Arabian Journal for Science And Engineering. 2012; 38: 523-536. https://doi.org/10.1007/s13369-012-0333-z

    Google Scholar
    [5]    American Concrete Institute (ACI), Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures (ACI 440.2R-17), Framington Hills, Michigan, USA: 2017.

    Google Scholar
    [6]    Fib Bulletin 90. Externally Applied FRP Reinforcement for RC Structures. du Béton FI: 2019.

    Google Scholar
    [7]    Mostofnejad D., Tabatabaei Kashani A. Experimental Study on Effect of EBR and EBROG Methods on Debonding of FRP Sheets Used for Shear Strengtheing of RC Beams. Composites Part B: Engineering. 2013; 45(1): 1704-1713. https://doi.org/10.1016/j.compositesb.2012.09.081

    Google Scholar
    [8]    Zararis P. D. Shear Strength and Minimum Shear Reinforcement of Reinforced Concrete Slender Beams. ACI Structural Journal. 2003; 100(2): 203-214. https://doi.org/10.14359/12484

    Google Scholar
    [9]    Teng, J. G., Chen, J. F., Smith, S. T. and Lam, L. FRP Strengthened RC Structures. London: Wiley-Blackwell. 2001.

    Google Scholar
    [10]    Pellegrino, C. and Vasic, M. Assessment of design procedures for the use of externally bonded FRP composites in shear strengthening of reinforced concrete beams. Composites Part B: Engineering. 2013; 45(1): 727-741. https://doi.org/10.1016/j.compositesb.2012.07.039

    Google Scholar
    [11]    Täljsten, B. FRP Strengthening of structures – bridging gaps in academic research and industry - 25-years’ experience creating innovation. MATEC Web of Conferences. Luleå University of Technology, Luleå, Sweden. 2018; 199(2): 01003. http://dx.doi.org/10.1051/matecconf/201819901003

    Google Scholar
    [12]    ASTM C39/C39M-14, Standard Test Method for Compressive Strength of Cylinderical Concrete Specimens, ASTM International, West Conshochocken, PA, USA. 2014. https://doi.org/10.1520/C0039_C0039M-14

    Google Scholar
    [13]    ASTM A615/A615M-22, Standard Specification for deformed and plain billet-steel bars for concrete reinforcement, ASTM international, West Conshochocken, PA, USA. 2022. https://doi.org/10.1520/A0615_A0615M-22


    [14]    American Concrete Institute (ACI), Building Code Requiremwents for Structural Concrete (ACI 318M-19) and Commentary (ACI 318R-19), Framington Hills, Michigan, USA: 2019.



    @article{ismael,ariomarandyousif,aliramadhan2023,
     author = {Ismael, Ari Omar and Yousif, Ali Ramadhan},
     title = {Shear Strengthening of Reinforced Concrete Beams Using CFRP Strips},
     journal = {Eurasian J. Sci. Eng},
     volume = {9},
     number = {3},
     pages = {1-12},
     year = {2023}
    }
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    Ismael, A. O., & Yousif, A.R. (2023). Shear Strengthening of Reinforced Concrete Beams Using CFRP Strips. Eurasian J. Sci. Eng, 9(3),1-12.

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    Ismael, AO, and Yousif AR. "Shear Strengthening of Reinforced Concrete Beams Using CFRP Strips." Eurasian J. Sci. Eng, 9.3, (2023), pp.1-12.

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    Ismael, A.O. and Yousif, A.R. (2023) "Shear Strengthening of Reinforced Concrete Beams Using CFRP Strips", Eurasian J. Sci. Eng, 9(3), pp.1-12.

    Copy

    Ismael AO, Yousif AR. Shear Strengthening of Reinforced Concrete Beams Using CFRP Strips. Eurasian J. Sci. Eng. 2023; 9(3):1-12.

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  • Shear Strengthening of Reinforced Concrete Beams Using CFRP Strips