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Steel and Composite Structures
  Volume 45, Number 4, November25 2022 , pages 591-603

Analysis and modeling of hyperstatic RC beam bonded by composite plate symmetrically loaded and supported
Rabahi Abderezak, Tahar Hassaine Daouadji and Benferhat Rabia

    The flexural strengthening of reinforced concrete beams by external bonding of composite materials has proved to be an efficient and practical technique. This paper presents a study on the flexural performance of reinforced concrete continuous beams with three spans (one span and two cantilevered) strengthened by bonding carbon fiber fabric (CFRP). The model is based on equilibrium and deformations compatibility requirements in and all parts of the strengthened continuous beam, i.e., the continuous concrete beam, the FRP plate and the adhesive layer. The adherend shear deformations have been included in the present theoretical analyses by assuming a linear shear stress through the thickness of the adherends. Remarkable effect of shear deformations of adherends has been noted in the results. The theoretical predictions are compared with other existing solutions that shows good agreement, and It shows the effectiveness of CFRP strips in enhancing shear capacity of continuous beam. It is shown that both the normal and shear stresses at the interface are influenced by the material and geometry parameters of the composite beam.
Key Words
    composite plate; continuous RC beam; interfacial stresses; shear lag effect; strengthening
Rabahi Abderezak, Tahar Hassaine Daouadji and Benferhat Rabia
1)Laboratory of Geomatics and sustainable development, University of Tiaret, Algeria
2)Department of Civil Engineering, Ibn Khaldoun University of Tiaret, Algeria

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