Skip to main content
SpringerLink
Log in

Strengthening of RC beams using externally bonded laminate (EBL) technique with end anchorages under flexure

  • Original Paper
  • Published:
Asian Journal of Civil Engineering Aims and scope Submit manuscript

Abstract

This paper presents a detailed study on flexural strengthening of reinforced concrete (RC) beams with externally bonded (EB) technique using carbon fiber-reinforced polymer (CFRP) laminate. The different strengthening methods used were externally bonded laminate (EBL) and externally bonded laminate with end anchorage (EBLA). All the beams were designed for under-reinforced condition. Totally, six beams were cast; out of this, two beams were control beams and remaining were strengthened beams. The study was mainly concentrated on the improvement of ultimate load carrying capacity. The experimentation was done using two-point loading condition. The result indicates that the ultimate load for all the strengthened beams was improved when compared to control beams. The beams strengthened with EBLA technique show maximum increase in ultimate load, i.e., 48.54% with reference to control beams and also delay the debonding to a certain extent.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9

Similar content being viewed by others

References

  • ACI Committee 440.2 R-08. (2008). Guide for the design and construction of externally bonded FRP systems for strengthening concrete structures. Reported by ACI Committee 440.

  • Ali, A., Abdalla, J., Hawileh, R., & Galal, K. (2014). CFRP mechanical anchorage for externally strengthened RC beams under flexure. Eighth International Conference on Material Sciences (CSM8-ISM5), Physics Procedia, vol. 55, pp. 10–16.

  • Ceroni, F. (2010). Experimental performances of RC beams strengthened with FRP materials. Construction and Building Materials, 24(9), 1547–1559.

    Article  Google Scholar 

  • Ceroni, F., Pecce, M., Matthys, S., & Taerwe, L. (2008). Debonding strength and anchorage devices for reinforced concrete elements strengthened with FRP sheets. Composites: Part B, 39(3), 429–441.

    Article  Google Scholar 

  • FIB. (2001). Externally bonded FRP reinforcement for RC structures, Fib Bulletin-14, Task group 9.3-FRP reinforcement for concrete structures, International Federation for structural concrete.

  • Fu, B., Teng, J. G., Chen, J. F., Chen, G. M., & Guo, Y. C. (2017). Concrete cover separation in FRP-plated RC beams: Mitigation using FRP U-jackets. Journal of Composites for Construction, 21(2), 1–13.

    Article  Google Scholar 

  • Galal, K., & Mofidi, A. (2009). Strengthening RC beams in flexure using new hybrid FRP sheet/ductile anchor system. Journal of Composites for Construction, 13(3), 217–225.

    Article  Google Scholar 

  • IS: 10262:2009. Concrete mix proportioning—Guidelines (1st revision).

  • IS: 456-2000. (2000). Plain and reinforced concrete code of practice. Code of practice (4th revision).

  • Jumaat, M. Z., & Alam, M. A. (2007). Plate bonded strengthened RC beams with end and intermediate anchors. International Journal of Engineering and Technology, 4, 185–193.

    Google Scholar 

  • Jumaat, M. Z., & Alam, M. D. A. (2010). Experimental and numerical analysis of end anchored steel plate and CFRP laminate flexurally strengthened reinforced concrete beams. International Journal of the Physical Sciences, 5(2), 132–144.

    Google Scholar 

  • Khan, A. U. R., & Fareed, S. (2014). Behaviour of reinforced concrete beams strengthened by CFRP wraps with and without end anchorages. Proceedings of fourth International Symposium on Infrastructure Engineering in Developing Countries, IEDC-2013, Procedia Engineering, vol. 77, pp. 123–130.

  • Mostafa, A., & Razaqpur, A. G. (2013). CFRP anchor for preventing premature debonding of externally bonded FRP laminates from concrete. Journal of Composites for Construction, 17, 641–650.

    Article  Google Scholar 

  • Ozbakkaloglu, T., Fang, C., & Gholampour, A. (2017). Influence of FRP anchor configuration on the behavior of FRP plates externally bonded on concrete members. Engineering Structures, 133, 133–150.

    Article  Google Scholar 

  • Razaqpur, G., & Mostafa, A. B. (2015). C-Anchor for strengthening the connection between adhesively bonded laminates and concrete substrates. Technologies, 2015(3), 238–258.

    Article  Google Scholar 

  • Spyrakos, C. C., Raftoyiannis, I. G., Credali, L., & Ussia, J. (2014). Experimental and analytical study on reinforced concrete beams in bending strengthened with FRP. The Open Construction and Building Technology Journal, 8, 153–163.

    Article  Google Scholar 

Download references

Acknowledgements

The Experimental Programme was conducted at Structural Engineering Laboratory of Civil Engineering Department, Bangalore Institute of Technology, Bangalore. We convey a sincere thanks to all the laboratory staff members for their assistance throughout the Experimental Program.

Author information

Authors and Affiliations

  1. Department of Civil Engineering, Bangalore Institute of Technology, Bengaluru, 560004, India

    N. Jeevan & H. N. Jagannatha Reddy

Authors
  1. N. Jeevan
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. H. N. Jagannatha Reddy
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to N. Jeevan.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Jeevan, N., Jagannatha Reddy, H.N. Strengthening of RC beams using externally bonded laminate (EBL) technique with end anchorages under flexure. Asian J Civ Eng 19, 263–272 (2018). https://doi.org/10.1007/s42107-018-0022-7

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s42107-018-0022-7

Keywords

Search

Navigation