The article provides an analysis of the state of the rationing issue in terms of performing the calculation justification and design of reinforcement of reinforced concrete structures using external reinforcement systems based on carbon fibers. The normative documents of the Russian Federation and foreign ones are considered, the analysis of the use of external reinforcement based on composite materials for structures of various types of work is carried out, the disadvantages of existing calculation and design methods are highlighted. In conclusion, recommendations are given on the appropriate improvement of calculation and design methods.

Keywords: external reinforcement, carbon fiber, reinforcement, restoration

The article presents an analysis of existing methods for determining the stiffness parameters of bent reinforced concrete elements reinforced with external reinforcement based on carbon fibers. The results of comparing the results of the determination of stiffness by practical methods and laboratory tests are presented. As a result, general conclusions and recommendations were made for further research of this issue, as well as the general parameters of the carbon fiber-based reinforcement system needed to be taken into account.

Keywords: external reinforcement, carbon fiber, reinforcement, restoration

The article provides an analysis of the possibility of using carbon fiber-based external reinforcement systems to strengthen the load-bearing structures of beam arches along steel beams. The main conclusions based on the results of previously conducted laboratory studies on full-scale samples, as well as the results of the work performed on reference objects are presented. As a result, general conclusions have been drawn regarding the calculation and design, as well as recommendations for further research on the calculation and design of these systems.

Keywords: vaults, prussian vaults, monier arch, external reinforcement, carbon fiber, reinforcement, restoration