Strengthening and restoration of damaged reinforced concrete structures with composite plastics

Authors

DOI:

https://doi.org/10.15587/1729-4061.2022.254728

Keywords:

restoration of reinforced concrete structures, fiber-reinforced plastics, pre-stress, single-span reinforced concrete beam

Abstract

This paper considers directions to devise methods for restoring the operational suitability of reinforced concrete structures. Mistakes of designers and non-compliance with the concreting technology of monolithic reinforced concrete structures lead to the formation of cracks and deflections of unacceptable size in reinforced concrete beams and floor slabs, as well as to insufficient strength of the elements. Such structures require not only an increase in bearing capacity but also the restoration of the operational suitability of damaged structures. A technique for restoring the serviceability of bendable reinforced concrete structures with increased deflections and excessive crack opening is proposed. To restore bendable reinforced concrete structures, surface reinforcement with pre-stressed fiber-reinforced plastics is suggested, which is ensured by the creation of a building lift in the damaged elements. Fiber-reinforced plastics have a high strain modulus, elastic nature of the diagram, and increased frost resistance; they tolerate fatigue effects well and are resistant to the effects of chemically active substances. Unlike conventional reinforcement methods, surface reinforcement techniques are characterized by high gain efficiency, corrosion resistance, low labor intensity, and short terms of work; they ensure strength increase and provide for economic feasibility. This study's results established that the use of fiber-reinforced plastics not only increases the bearing capacity of reinforced concrete structures but also helps reduce the width of the cracks formed. Thus, it is possible to avoid an increase in the cross-section of structures and reduce the time of operations, which could lead to additional costs

Author Biographies

Zhanna Mukhanbetzhanova, Satbayev University

PhD

Department of Construction and Building Materials

Aliy Bespayev, Kazakh Research and Design Institute of Construction and Architecture

Doctor of Technical Sciences, Professor, Head of Concrete Laboratory

Laboratory of Concrete

References

  1. Bakis, C. E., Bank, L. C., Brown, V. L., Cjzenza, E. (2002). Fibre-Reinforced Polimer Composites for Construction-State of the Art Review. Journal of Composites in Construction.
  2. Bespaev, A. A, Kuralov, U. S., Altigenov, U. B. (2011). Usilenie zhelezobetonnykh konstruktsiy polimernymi materialami. Vestnik Natsional'noy inzhenernoy akademii RK, Almaty.
  3. Yang, J., Haghani, R., Blanksvärd, T., Lundgren, K. (2021). Experimental study of FRP-strengthened concrete beams with corroded reinforcement. Construction and Building Materials, 301, 124076. doi: https://doi.org/10.1016/j.conbuildmat.2021.124076
  4. Lin, X., Zhang, Y. X. (2013). Bond–slip behaviour of FRP-reinforced concrete beams. Construction and Building Materials, 44, 110–117. doi: https://doi.org/10.1016/j.conbuildmat.2013.03.023
  5. Triantafyllou, G. G., Rousakis, T. C., Karabinis, A. I. (2018). Effect of patch repair and strengthening with EBR and NSM CFRP laminates for RC beams with low, medium and heavy corrosion. Composites Part B: Engineering, 133, 101–111. doi: https://doi.org/10.1016/j.compositesb.2017.09.029
  6. Singh, S. B. (2013). Shear response and design of RC beams strengthened using CFRP laminates. International Journal of Advanced Structural Engineering, 5 (1), 16. doi: https://doi.org/10.1186/2008-6695-5-16
  7. Fu, B., Tang, X. T., Li, L. J., Liu, F., Lin, G. (2018). Inclined FRP U-jackets for enhancing structural performance of FRP-plated RC beams suffering from IC debonding. Composite Structures, 200, 36–46. doi: https://doi.org/10.1016/j.compstruct.2018.05.074
  8. Hussein, M., Afefy, H. M. E.-D., Khalil, A.-H. A.-K. (2013). Innovative Repair Technique for RC Beams Predamaged in Shear. Journal of Composites for Construction, 17 (6), 04013005. doi: https://doi.org/10.1061/(asce)cc.1943-5614.0000404
  9. Campione, G., Minafò, G. (2012). Behaviour of concrete deep beams with openings and low shear span-to-depth ratio. Engineering Structures, 41, 294–306. doi: https://doi.org/10.1016/j.engstruct.2012.03.055
  10. Hussain, Q., Pimanmas, A. (2015). Shear strengthening of RC deep beams with openings using Sprayed Glass Fiber Reinforced Polymer Composites (SGFRP) : Part 1. Experimental study. KSCE Journal of Civil Engineering, 19 (7), 2121–2133. doi: https://doi.org/10.1007/s12205-015-0243-1

Downloads

Published

2022-04-28

How to Cite

Mukhanbetzhanova, Z., & Bespayev, A. (2022). Strengthening and restoration of damaged reinforced concrete structures with composite plastics. Eastern-European Journal of Enterprise Technologies, 2(1 (116), 81–86. https://doi.org/10.15587/1729-4061.2022.254728

Issue

Vol. 2 No. 1 (116) (2022): Engineering technological systems

Section

Engineering technological systems

License

Copyright (c) 2022 Zhanna Mukhanbetzhanova, Aliy Bespayev

Creative Commons License

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

The consolidation and conditions for the transfer of copyright (identification of authorship) is carried out in the License Agreement. In particular, the authors reserve the right to the authorship of their manuscript and transfer the first publication of this work to the journal under the terms of the Creative Commons CC BY license. At the same time, they have the right to conclude on their own additional agreements concerning the non-exclusive distribution of the work in the form in which it was published by this journal, but provided that the link to the first publication of the article in this journal is preserved.

A license agreement is a document in which the author warrants that he/she owns all copyright for the work (manuscript, article, etc.).
The authors, signing the License Agreement with TECHNOLOGY CENTER PC, have all rights to the further use of their work, provided that they link to our edition in which the work was published.
According to the terms of the License Agreement, the Publisher TECHNOLOGY CENTER PC does not take away your copyrights and receives permission from the authors to use and dissemination of the publication through the world's scientific resources (own electronic resources, scientometric databases, repositories, libraries, etc.).
In the absence of a signed License Agreement or in the absence of this agreement of identifiers allowing to identify the identity of the author, the editors have no right to work with the manuscript.
It is important to remember that there is another type of agreement between authors and publishers – when copyright is transferred from the authors to the publisher. In this case, the authors lose ownership of their work and may not use it in any way.