On the calculation of the gain of reinforced concrete supports of technological overpasses using a steel clips

The article discusses the issues of using a steel cage to strengthen reinforced concrete supports of overpasses. The necessity of applying the methodology for calculating reinforced concrete elements based on a nonlinear deformation model in the strength calculation of reinforcement elements is also considered. The issues of accounting for the friction forces of a metal cage and a reinforced concrete support when taking into account the forces of its compression are raised. Conclusions are drawn about the need to conduct full-scale tests of concrete with a loading history in order to obtain up-to-date stress-strain diagrams.