Repairing of Damaged Reinforced Concrete Structures with Composite Materials
Directions for the development of methods for restoring the serviceability of reinforced concrete structures are formulated. A method is proposed for restoring the serviceability of bent reinforced concrete structures with increased deflections and excessive crack opening. For the restoration of bent reinforced concrete structures, surface reinforcement with prestressed fiber-reinforced plastics is proposed, which is provided by the creation of a building lift in damaged elements. Comprehensive experimental studies of flexible and compressed elements reinforced with fiber-reinforced plastics included studying the operation of normal and inclined sections of flexible structures. To study the operation of normal sections, several series of reinforced concrete beams with a section of 120x200 mm and a length of 2200 mm were tested, which were reinforced with symmetrical longitudinal reinforcement of the A400 and A500 classes. The samples were surface-reinforced with S&P Laminate «BASF» (Germany) carbon tapes glued to the compressed and tensioned faces of the beams. The prototypes were tested according to the scheme of a single-span hinged beam, loaded in the thirds of the span by equal concentrated forces.