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Abstract

Retrofitting existing buildings or increasing the strength of new buildings has become a major issue in the world today to meet the new requirements. Many studies have sought new techniques to renovate old concrete structures. This paper presents four large scale RC box beams with hollow cross-sections measuring 400 mm x 400 mm and 3,000 mm in length that were tested under torsion; two beams were used as a control specimen whereas, the remaining two beams were partially strengthened for torsion on two sides by EBR-CFRP strips. The effeteness of the number of the layer have been discussed. The relationships between torsional moment and twisted angle, and the failure modes of the beam specimens are investigated. The ultimate torque capacity of beam specimens strengthened by EBR has resulted in improvements in the torque capacity of beams. Specifically, the enhancements were 15% when using one layer of CFRP while when using two layers of CFRP was 29%.

Keywords

CFRP EBR debonding

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Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

How to Cite
Ali. Z. Abbas, & Mohammed. A. Masheri. (2023). Torsional behavior of strengthened reinforced concrete beams on two sides by CFRP using EBR Techniques. Texas Journal of Engineering and Technology, 26, 72–79. Retrieved from https://zienjournals.com/index.php/tjet/article/view/4716

References

  1. Hashemi, S., & Al-Mahaidi, R. (2012). Investigation of flexural performance of RC beams strengthened with CFRP textile and cement based adhesives. In Proceedings of the 3rd Asia-Pacific Conference on FRP in Structures (APFIS 2012).
  2. Hashemi, S., & Al-Mahaidi, R. (2010). Investigation of bond strength and flexural behavior of FRP strengthened RC beams using cement-based adhesives. In Structures Congress 2010 (pp. 689-700).
  3. Salom, P. R., Gergely, J., & Young, D. T. (2004). Torsional strengthening of spandrel beams with fiber-reinforced polymer laminates. Journal of Composites for Construction, 8(2), 157-162.
  4. Ameli, M., Ronagh, H. R., & Dux, P. F. (2007). Behavior of FRP strengthened reinforced concrete beams under torsion. Journal of Composites for Construction, 11(2), 192-200.
  5. Chalioris, C. E. (2008). Torsional strengthening of rectangular and flanged beams using carbon fibre-reinforced-polymers–Experimental study. Construction and Building Materials, 22(1), 21-29.
  6. Fib Bulletin 14. Externally bonded FRP reinforcement for RC structures. (CEB-FIB) Lausanne (Switzerland): The International Federation for Structural Concrete; 2001.
  7. Hii, A. K., & Al-Mahaidi, R. (2006). Experimental investigation on torsional behavior of solid and box-section RC beams strengthened with CFRP using photogrammetry. Journal of Composites for Construction, 10(4), 321-329.
  8. Mohammadizadeh, M. R., Fadaei, M. J., & Rounagh, H. R. (2009). Improving torsional behaviour of reinforced concrete beams strengthened with carbon fibre reinforced polymer composite.
  9. Ameli, M., Ronagh, H. R., & Dux, P. F. (2007). Behavior of FRP strengthened reinforced concrete beams under torsion. Journal of Composites for Construction, 11(2), 192-200.
  10. Jing, M., Raongjant, W., & Li, Z. (2007). Torsional strengthening of reinforced concrete box beams using carbon fiber reinforced polymer. Composite Structures, 78(2), 264-270.
  11. ACI-318, 318-19 Building Code Requirements for Structural Concrete and Commentary. 2019.