» Renforcement en flexion et rétablissement de la précontrainte par pré-tension des bandes en carbone
Le problème
La poutre présente un état dégradé et détérioré qui a conduit au cisaillement de quelques torons de précontrainte et au décollement du béton à cause d’un changement des conditions de charge ou à une dégradation des matériaux, entraînant une réduction des performances initiales et de la capacité de portance.
La solution
Utilisation à l’intrados des poutres de bandes pultrudées en fibre de carbone pré-tendues de manière à rétablir la précontrainte perdue à cause du cisaillement des torons.
Application du produit
Phase 1: réalisation des trous pour la fixation des plaques et application du primaire armoprimer 100
Phase 2 : fixation de la plaque
Phase 3: application de la bande ARMOSHIELD CFK sur la longueur de la poutre
Phase 4: pré-tension de la bande avec vérin hydraulique
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