The way to strengthen concrete structures in civil engineering by adding external reinforcement using carbon fiber composites is widely spreading in recent years. A method for calculating the strength of reinforced concrete in hydro technical constructions with reinforcing by carbon fiber composite materials was invented with the aim to justify the solutions of strengthening concrete structures. It was taken into consideration that the characteristic features of mass reinforced concrete structure with sand operating loads which including backpressure of water in the cracks and in opened construction joints. It has evolved the relations for calculation of strength in normal cross section of bending reinforced concrete member of hydro technical constructions which strengthening with external reinforcement by carbon fiber.

Oleg D Rubin
<p>Scientific Research Institute of Energy Structures (Open Joint-stock Company)</p>

Stroitel’nyj proezd, 7A, Moscow, Russia, 125362

Doctor of Technical Sciences, Deputy General Director of JSC “Research Institute of Energy Facilities” (JSC “NIIES”)

Sergey E Lisichkin
<p>Engineering Center of Structures, Constructions and Technologies in Energy (Limited Liability Company)</p>

Svobody str., 35, Moscow, Russia, 125362

Doctor of Technical Sciences, Deputy General Director of LLC “Engineering Center of Facilities, Structures, Technology in Energy Systems” (LLC “IC SCTE”)

Kirill E Frolov

Malaya Dmitrovka str., 7, Moscow, Russia, 127006

Deputy General Director of OJSC “RusHydro” for research and design activities; (OJSC “RusHydro”)

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