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Advances in Materials Research Volume 11, Number 2, June 2022 , pages 91-109 DOI: https://doi.org/10.12989/amr.2022.11.2.091 |
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Rehabilitation of RC structural elements: Application for continuous beams bonded by composite plate under a prestressing force |
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Rabahi Abderezak, Benferhat Rabia and Tahar Hassaine Daouadji
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| Abstract | ||
| This paper presents a closed-form higher-order analysis of interfacial shear stresses in RC continuous beams strengthened with bonded prestressed laminates. For retrofitting reinforced concrete continuous beams is to bond fiber reinforced prestressed composite plates to their tensile faces. An important failure mode of such plated beams is the debonding of the composite plates from the concrete due to high level of stress concentration in the adhesive at the ends of the composite plate. The model is based on equilibrium and deformations compatibility requirements in and all parts of the strengthened beam, where both the shear and normal stresses are assumed to be invariant across the adhesive layer thickness. 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 RC continuous beams strengthened with bonded prestressed laminates. The theoretical predictions are compared with other existing solutions. A parametric study has been conducted to investigate the sensitivity of interface behavior to parameters such as laminate stiffness and the thickness of the laminate where all were found to have a marked effect on the magnitude of maximum shear and normal stress in the composite member. | ||
| Key Words | ||
| composite plate; continuous RC beam; interfacial stresses; shear lag effect; strengthening | ||
| Address | ||
| Department of Civil Engineering, Laboratory of Geomatics and Sustainable Development, University of Tiaret, Algeria. | ||
