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Steel and Composite Structures Volume 20, Number 2, February10 2016 , pages 413-429 DOI: https://doi.org/10.12989/scs.2016.20.2.413 |
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Analyze of the interfacial stress in reinforced concrete beams strengthened with externally bonded CFRP plate |
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Lazreg Hadji, T. Hassaine Daouadji, M. Ait Amar Meziane and E.A. Adda Bedia
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| Abstract | ||
| A theoretical method to predict the interfacial stresses in the adhesive layer of reinforced concrete beams strengthened with externally bonded carbon fiber-reinforced polymer (CFRP) plate is presented. The analysis provides efficient calculations for both shear and normal interfacial stresses in reinforced concrete beams strengthened with composite plates, and accounts for various effects of Poisson's ratio and Young's modulus of adhesive. Such interfacial stresses play a fundamental role in the mechanics of plated beams, because they can produce a sudden and premature failure. The analysis is based on equilibrium and deformations compatibility approach developed by Tounsi. In the present theoretical analysis, the adherend shear deformations are taken into account by assuming a parabolic shear stress through the thickness of both the reinforced concrete beam and bonded plate. The paper is concluded with a summary and recommendations for the design of the strengthened beam. | ||
| Key Words | ||
| FRP composites; interfacial stresses; reinforced concrete beam; strengthening; adhesive | ||
| Address | ||
| (1) Lazreg Hadji, T. Hassaine Daouadji, M. Ait Amar Meziane: Université Ibn Khaldoun, BP 78 Zaaroura, 14000 Tiaret, Algérie; (2) Hassaine Daouadji, M. Ait Amar Meziane, E.A. Adda Bedia: Laboratoire des Matériaux & Hydrologie, Université de Sidi Bel Abbes, 22000 Sidi Bel Abbes, Algérie. | ||