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Crack width evaluation in FRP reinforced concrete members

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Abstract

This study proposes a model for calculating the average width of cracks in reinforced concrete (RC) elements using non metallic reinforcement bars (FRP). This model has already been applied to the case of steel reinforcing bars successfully. It considers the influence of the percentage of reinforcement and the concrete strength. It emphasizes how the mechanical features of FRP (fiber reinforced polymer) bars, and particularly their modulus of elasticity, can affect the crack width. The model is validated with experimental results available in the literature. An example of its application for the calculation of the crack width is shown.

Résumé

Cet article présente l'application d'un modèle de prévision de l'amplitude des fissures en présence d'armatures non métalliques et de classes de résistance du béton allant de 30 à 80 MPa. L'analyse théorique est utilisée pour interpréter les résultats d'essais expérimentaux sur des traverses en béton armé contenant des polymères renforcés de fibres (FRP) soumises à des forces de traction.

Le but de cette recherche était d'étudier et de prévoir la largeur des fissures, en utilisant comme paramètres de base la contrainte dans l'acier et la distance moyenne entre les fissures. La recherche décrit aussi l'amplitude des fissures, pour la même traverse, en présence d'armatures en acier et en polymères renforcés de fibres (FRP).

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Authors and Affiliations

  1. Institute of Architecture, Venice University, Venice, Italy

    G. Creazza (RILEM Senior Member) & S. Russo

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  1. G. Creazza
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  2. S. Russo
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Creazza, G., Russo, S. Crack width evaluation in FRP reinforced concrete members. Mat. Struct. 34, 119–125 (2001). https://doi.org/10.1007/BF02481561

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