Application of external prestressing on the rehabilitation of reinforced concrete beams

Ali K. AL-Asadi


Concrete structure experiencing any form of distress due to multiple reasons; need remedial, strengthening, and rehabilitation measures, if the structure is to attain serviceability and strength requirements of different elements. Further, the external welding reinforcement and prestressing of the reinforced concrete members have been proven to provide an effective strengthening approach. The prestressed concrete describes a type of concrete where internal stresses are instituted to counteract the multiple tensile stresses that are characteristics of service loading. In these concrete structures, cables, hard-drawn wires or bars of high strength alloy steel are employed as tendons to generate the counteracting stresses. The prestressed concrete is made up of an active combination of steel and concrete as these materials are traditionally stressed before the application of external loads. The prestressing technique has been comprehensively reviewed in numerous articles showing that it is more effective than the RCC structures. External prestressing is emerging as an essential component of prestressing as it is structurally attractive and economical. In external prestressing, the tendons are placed outside the member to improve the load-bearing capacity of the structures and their members. In this study, a beam exposed to various loading condition and distress is strengthened using external prestressing. The ultimate deflection and failure characteristics were evaluated using different loading scenarios; beam weight, live weight, and dead weight. The results for the prestressing analysis was provided for 10 and 20 strands.


Prestressing Reinforced Concrete (RC) Rehabilitation Beams Loading Stress Deflection

Full Text:



A. Demir, E. Ercan and D. D. Demir, "Strengthening of reinforced concrete beams using external steel members," Steel and Composite Structures, vol. 27, no. 4, pp. 453-464, 2018.

H. Kaur and J. Singh, "A Review on External Prestressing in Concrete," International Research Journal of Engineering and Technology, vol. 4, no. 5, pp. 1801-1805, 2017.

R. Muthukumar and N. Balasundaram, "Rehabilitation of Distressed Concrete Beams Using External Prestressing – Experimental Study," International Journal of Applied Engineering Research, vol. 12, no. 15, pp. 4806-4810, 2017.

X. Xue, X. Wang, X. Hua, M. Wu, L. Wu, Z. Ma and J. Zhou, "Experimental Investigation of the Shear Behavior of a Concrete Beam without Web Reinforcements Using External Vertical Prestressing Rebars," Advances in Civil Engineering, vol. 2019, pp. 1-13, 2019.

H. Yue-lin, W. Jong-hwei, Y. Tsong, H. Chien-hsing and L. Yiching, "Strengthening reinforced concrete beams using prestressed glass fiber-reinforced polymer—Part I: Experimental study," Journal of Zhejiang University-SCIENCE A, vol. 6, no. 3, pp. 166-174, 2005.

K. Ganesh and S. K. Sekar, "A Review of Behaviour of Externally Prestressed Beams," International Journal of Civil Engineering and Technology, vol. 9, no. 7, pp. 382-389, 2018.

A. A. Allawi, "Behavior of Strengthened Composite Prestressed Concrete Girders under Static and Repeated Loading," Advances in Civil Engineering, vol. 2017, pp. 1-13, 2017.

I. A. M, "Parametric Study of Continuous Concrete Beam Prestressed with External Tendon," Jordan Journal of Civil Engineering, vol. 4, no. 3, pp. 211-221, 2010.

T. El-Shafiey and A. Atta, "No Access Retrofitting of reinforced concrete beams in shear using external prestressing technique," Magazine of Concrete Research, vol. 64, no. 3, pp. 201-211, 2012.

A. El-HakimKhalil, E. Etman, A. Atta and S. Fayed, "Torsional Strengthening of RC Box Beams Using External Prestressing Technique," IOSR Journal of Mechanical and Civil Engineering, vol. 12, no. 2, pp. 30-41, 2015.

S.-H. Lee, K.-J. Shin and H.-D. Lee, "Post-Tensioning Steel Rod System for Flexural Strengthening in Damaged Reinforced Concrete (RC) Beams," Applied Sciences, vol. 8, no. 10, pp. 1763-1790, 2018.

M. Y. Sabra, Y. A. Temsah, O. M. Baalbaki, and A. Z. Saleh, "Repair of Damaged Prestressed Concrete Beams Using CFRP Fabric and Stitching Techniques," International Journal of Civil Engineering and Technology, vol. 9, no. 10, pp. 427-440, 2018.

Y. Tianlai, T. Shuai, Z. Yunpeng, and Z. Liyuan, "Experimental and Theoretical Investigation of Bending in Concrete Beams Strengthened with External Prestressing CFRP Tendons," The Open Construction & Building Technology Journal, vol. 10, pp. 492-510, 2019.

A. Madaj and K. Mossor, "Evaluation of External Prestressing as a Strengthening Method for Existing Concrete Bridges," Structural Engineering International, 2019.

S. Aykac, I. Kalkan, B. Aykac, S. Karahan, and S. Kayar, "Strengthening and Repair of Reinforced Concrete Beams Using External Steel Plates," Journal of Structural Engineering, vol. 139, no. 6, 2013.

Rashid, S., Ahmed, A., Barazanchi, I. Al, and Jaaz, Z.A., 2019. Clustering algorithms subjected to K-mean and gaussian mixture model on multidimensional data set. Periodicals of Engineering and Natural Sciences, 7 (2), pp.448–457.

B. Durakovic, “Design for Additive Manufacturing: Benefits, Trends and Challenges”, Periodicals of Engineering and Natural Sciences (PEN), vol. 6, pp. 179–191, 2018.

B. Durakovic, "Design of Experiments Application, Concepts, Examples: State of the Art," Periodicals of Engineering and Natural Scinces, vol. 5, no. 3, p. 421‒439, 2017.

B. Durakovic, “Thermal Performances of Glazed Energy Storage Systems with Various Storage Materials: An Experimental study”, Sustainable Cities and Society, vol. 45, pp. 422-430, 2019.



  • There are currently no refbacks.

Copyright (c) 2019 Ali K. AL-Asadi

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

ISSN: 2303-4521

Digital Object Identifier DOI: 10.21533/pen

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