1. Home
  2. Vol 9, No 10 (2023)
  3. Alhilli

Shear Performance of Reinforced Concrete T Beams Strengthened by Carbon Fiber-Reinforced Polymer Bars

Hussain Hassan Alhilli, Mahdi H. Al-Farttoosi

Abstract


The primary purpose of this work is to investigate the shear response of T-reinforced concrete beams strengthened for shear using the embedded through section (ETS) technique when subjected to a monotonic one-point load till failure. The experimental approach included an examination of the twelve reinforced concrete T-beams, including two reference beams without any strengthening and ten strengthened beams. The twelve beams were divided into two main groups, with and without stirrups. The main variables in every group were the spacing and angle of inclination of the carbon fibre-reinforced polymer (CFRP) bars. The beams were strengthened in shear with CFRP bars inserted in the centre line of the section with different spacings and angles of inclination. The experimental analysis was performed to study the effect of spacing and angle of inclination of the CFRP bars on the ultimate load capacity, load-strain relationships, and load-deflection relationships. Results showed that the ultimate load of the beams in group one with inclined CFRP bars (45°) increased by 29.7, 22.4, and 15.5% for beams with CFRP bar spacings of 10, 15, and 20 cm, respectively, compared with the reference beam. In group one (with stirrups), the beam with inclined CFRP bars (45°) and a spacing of 10 cm has an ultimate load higher than that with vertical CFRP bars (90°) with a similar spacing by 2.6%. By contrast, the beam with inclined CFRP bars (45°) and a spacing of 10 cm in group two (without stirrups) has an ultimate load higher than that with vertical CFRP bars (90°) with a similar spacing by 2.5%.

 

Doi: 10.28991/CEJ-2023-09-10-04

Full Text: PDF


Keywords


T-Beams; CFRP Bars; Embedded Through Section (ETS); Shear Strength.

References


Jalil, A., & Al-Zuhairi, A. H. (2022). Behavior of Post-Tensioned Concrete Girders Subject to Partially Strand Damage and Strengthened by NSM-CFRP Composites. Civil Engineering Journal (Iran), 8(7), 1507–1521. doi:10.28991/CEJ-2022-08-07-013.

Abdulkareem, B., & Izzet, A. F. (2022). Serviceability of Post-fire RC Rafters with Openings of Different Sizes and Shapes. Journal of Engineering, 28(1), 19–32. doi:10.31026/j.eng.2022.01.02.

Abbas, H. Q., & Al-Zuhairi, A. H. (2022). Usage of EB-CFRP for Improved Flexural Capacity of Unbonded Post-Tensioned Concrete Members Exposed to Partially Damaged Strands. Civil Engineering Journal (Iran), 8(6), 1288–1303. doi:10.28991/CEJ-2022-08-06-014.

Tuma, N. K., Al-Ahmed, A. H., & Al-Farttoosi, M. H. (2020). The shear strengthening of reinforced concrete beams by embedded through section technique -analytical study-. IOP Conference Series: Materials Science and Engineering, 888(1). doi:10.1088/1757-899X/888/1/012039.

Mhanna, H. H., Hawileh, R. A., & Abdalla, J. A. (2019). Shear strengthening of reinforced concrete beams using CFRP wraps. Procedia Structural Integrity, 17, 214–221. doi:10.1016/j.prostr.2019.08.029.

Abdulkareem, B. F., & Izzet, A. F. (2022). Residual post fire strength of non-prismatic perforated beams. IOP Conference Series: Earth and Environmental Science, 961(1), 012002. doi:10.1088/1755-1315/961/1/012002.

Belarbi, A., Bae, S. W., & Brancaccio, A. (2012). Behavior of full-scale RC T-beams strengthened in shear with externally bonded FRP sheets. Construction and Building Materials, 32(1), 27–40. doi:10.1016/j.conbuildmat.2010.11.102.

Hamid, N. A. A., Thamrin, R., & Ibrahim, A. (2013). Shear Capacity of Non-Metallic (FRP) Reinforced Concrete Beams with Stirrups. International Journal of Engineering and Technology, 5(5), 593–598. doi:10.7763/ijet.2013.v5.624.

Ozden, S., Atalay, H. M., Akpinar, E., Erdogan, H., & Vulaş, Y. Z. (2014). Shear strengthening of reinforced concrete T-beams with fully or partially bonded fibre-reinforced polymer composites. Structural Concrete, 15(2), 229–239. doi:10.1002/suco.201300031.

Said, M., Adam, M. A., Mahmoud, A. A., & Shanour, A. S. (2016). Experimental and analytical shear evaluation of concrete beams reinforced with glass fiber reinforced polymers bars. Construction and Building Materials, 102(1), 574–591. doi:10.1016/j.conbuildmat.2015.10.185.

Issa, M. A., Ovitigala, T., & Ibrahim, M. (2016). Shear Behavior of Basalt Fiber Reinforced Concrete Beams with and without Basalt FRP Stirrups. Journal of Composites for Construction, 20(4). doi:10.1061/(asce)cc.1943-5614.0000638.

Fan, X., Zhou, Z., Tu, W., & Zhang, M. (2021). Shear behaviour of inorganic polymer concrete beams reinforced with basalt FRP bars and stirrups. Composite Structures, 255(1). doi:10.1016/j.compstruct.2020.112901.

Alwash, D., Kalfat, R., Al-Mahaidi, R., & Du, H. (2021). Shear strengthening of RC beams using NSM CFRP bonded using cement-based adhesive. Construction and Building Materials, 301(1), 124365. doi:10.1016/j.conbuildmat.2021.124365.

Bui, L. V. H., Klippathum, C., Prasertsri, T., Jongvivatsakul, P., & Stitmannaithum, B. (2022). Experimental and Analytical Study on Shear Performance of Embedded Through-Section GFRP-Strengthened RC Beams. Journal of Composites for Construction, 26(5), 4022046. doi:10.1061/(asce)cc.1943-5614.0001235.

Peng, K. Di, Huang, J. Q., Huang, B. T., Xu, L. Y., & Dai, J. G. (2023). Shear strengthening of reinforced concrete beams using geopolymer-bonded small-diameter FRP bars. Composite Structures, 305(1), 116513. doi:10.1016/j.compstruct.2022.116513.

ACI 318-19. (1989). Building Code Requirements for Structural Concrete. American Concrete Institute (ACI), Michigan, United States.

ACI 440.2R-17. (2017). Guide for the Design and Construction of Externally Bonded FRP Systems for Strengthening of Concrete Structures. American Concrete Institute (ACI), Michigan, United States.

Mansur, M. A., Huang, L. M., Tan, K. H., & Lee, S. L. (1992). Deflections of reinforced concrete beams with web openings. ACI Structural Journal, 89(4), 391–397. doi:10.14359/3019.

Rashmi, M., Anand, V. N., & Balaji, N. C. (2021). Shear strengthening of RC beams using near surface mounted technique with glass fiber reinforced polymer. AIP Conference Proceedings. doi:10.1063/5.0039664.

Van Hong Bui, L., Stitmannaithum, B., & Ueda, T. (2020). Experimental Investigation of Concrete Beams Strengthened with Embedded Through-Section Steel and FRP Bars. Journal of Composites for Construction, 24(5), 4020052. doi:10.1061/(asce)cc.1943-5614.0001055.


Full Text: PDF

DOI: 10.28991/CEJ-2023-09-10-04

Refbacks

  • There are currently no refbacks.


Bookmark and Share


Copyright (c) 2023 Hussain Hasan Alhilli, Mahdi H Al-Farttoosi

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
x
Message