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Probabilistic Thickness Requirement of CFRP Plates Bonded to Reinforced Concrete Bridge Decks

  • A. Ahmed
  • J. M. Kaura
  • O. S. AbejideEmail author
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)

Abstract

Probabilistic reinforced concrete bridge deck flexural strengthening with Carbon Fibre Reinforced Polymer (CFRP) laminates is presented. Results show that the existing and evaluated deck is in conformity with AASHTO LRFD (2010) specifications and indicate that the composite concrete deck as suggested in formulations meet the requirements for bridge decks and have the ability to sustain more live loads up to about 90% than conventional reinforced concrete decks of the same structural formulations. Also, the initial safety indices observable prove to be traffic dependent as it depends more on the live load. AASHTO design equation that corresponds to a βtarget = 3.5 seems to be overestimated for strengthening purposes. The strengthening with a βtarget = 4.2 as suggested herein provides a better structural reliability than βtarget of 3.5 proposed by AASHTO LRFD (2010) provision and with no significant differences in bonded CFRP amounts required. The optimum thickness of bonded CFRP laminates required is found to be 5 mm for the upgrading of reinforced concrete bridge decks.

Keywords

Reinforced concrete bridge decks Bonded CFRP laminates thickness Target structural reliability 

References

  1. Aref, A.J., Alampalli, S., He, Y.: performance of a fibre reinforced polymer web core skew bridge superstructure. Part I: field testing and finite element simulations. Part II: failure modes and parametric study. Compos. Struct. 69(4), 500–509 (2005)CrossRefGoogle Scholar
  2. AASHTO LRFD : Bridge Design Specifications. American Association of State Highway and Transportation Officials, Washington, D.C. (2004)Google Scholar
  3. AASHTO LRFD: Bridge Design Specifications. American Association of State Highway and Transportation Officials, Washington, D.C. (2010)Google Scholar
  4. Carolin, A., Nordin, H., Täljsten, B.: Concrete beams strengthened with near surface mounted reinforcement of CFRP. In: Teng, J.-G. (ed.) International Conference on FRP Composites in Civil Engineering, vol. 2, pp. 1059–1066 (2001). ISBN: 0-08-043945-4Google Scholar
  5. Carolin, A., Hejll, A., Täljsten B.: Behaviour of concrete beams strengthened with CFRP and loaded in fatigue during the strengthening process. Paper presented at ICCI, San Francisco, June 2002Google Scholar
  6. Folić, R.: Analysis of the effective slab width in reinforced and prestressed concrete elements. In: Damjanić, F., Swansea, P.P. (eds.) Computer-Aided Analysis and Design of C S, Part. II, pp. 1339–1354 (1984)Google Scholar
  7. Folić, R., Cumbo, A.: Application of finite elements method in analysis of composite concrete-steel beams. BAM-1770/ 2001 XCIV, TU Budapest, pp. 55–66 (2001)Google Scholar
  8. Federal Highway Administration (FHWA): FRP decks and super-structures: current practice (2002). http://www.fhwa.dot.gov/bridge/frp/deckprac.htm
  9. Goldberg, D.E.: Genetic Algorithms in Search, Optimization, and Machine Learning. Addison Wesley, New York (1989)Google Scholar
  10. Goldberg, D.E., Deb, K.: A comparative analysis of selection schemes used in genetic algorithms. In: Rawlins, G. (ed.) Foundations of Genetic Algorithms. Morgan Kaufmann, San Mateo (1991)Google Scholar
  11. Luke, S.: The design, installation and monitoring of an FRP bridge at West Mill, Oxford. In: Proceedings of Lightweight Bridge Decks-European Bridge Engineering Conference, Rotterdam, Netherlands, 27–28 March 2003Google Scholar
  12. Karbhari, V.M.: FRP bridge decks, from design and characterization to field implementation. In: Proceedings of Lightweight Bridge Decks-European Bridge Engineering Conference, Rotterdam, Netherlands, 27–28 March 2003Google Scholar
  13. Madsen, H.O.: Structural Behaviour of Timber. Timber Engineering Ltd., Vanvouver (1992)Google Scholar
  14. Melchers, R.E.: Structural Reliability Analysis and Prediction, 2nd edn. Wiley, Chichester (1999)Google Scholar
  15. Nordin, H., Täljsten, B., Carolin, A.: CFRP near surface mounted reinforcement (NSMR) for pre-stressing concrete beams. Paper presented at ICCI, San Francisco, June 2002Google Scholar
  16. Rahman, A.H., Taylor, D.A., Kingsley, C.Y.: Evaluation of FRP as reinforcement for concrete bridges. In: Fiber-Reinforced-Plastic Reinforcement for Concrete Structures International Symposium, pp. 71–86. American Concrete Institute, Detroit (1993)Google Scholar
  17. Sivaraj, R., Ravichandran, T.: A review of selection methods in genetic algorithm. Int. J. Eng. Sci. Technol. (IJEST) 3(5), 3792–3793 (2011)Google Scholar
  18. Stanley, K.S., William, L.G., Frank, E.W.: Differential reliability: probabilistic engineering applied to wood members in bending/tension. Forest Product Laboratory, United States Department of Agriculture, Madison, Wisconsin (1978)Google Scholar
  19. Täljsten, B., Carolin, A.: CFRP - Strengthening. concrete beams strengthened with near surface mounted CFRP laminates. In: Burgoyne, C. (ed.) Fibre Reinforced Plastics for Reinforced Concrete Structures, FRPRCS-5, Cambridge, pp. 107–116 (2001)Google Scholar
  20. Täljsten, B.: Strengthening of existing concrete structures with externally bonded fibre reinforced polymers, design and execution. Technical report, Division of Structural Engineering, Luleå University of Technology, Lulea (2002)Google Scholar
  21. Tsompanakis, Y., Papadrakakis, M.: Robust and Efficient Methods for Reliability-based Structural Optimization (2000)Google Scholar
  22. Tsompanakis, Y., Papadrakakis, M.: Efficient computational methods for large-scale structural optimization. Int. J. Comput. Eng. Sci. 1(02), 331–354 (2000)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Civil EngineeringAhmadu Bello UniversityZariaNigeria

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