Study on the stretching properties of rusted rebar

Reinforced concrete is widely used in our engineering buildings. Reinforced concrete is the use of concrete pressure resistance and reinforced pull performance, the integration of the two can be very good to improve the ability to resist external forces. However, rebar is prone to rust, after corrosion, the performance of rebar will be greatly reduced, which will affect the overall force of reinforced concrete. Therefore, it is of great significance to study the mechanics of steel bars after corrosion. In this experiment, the rapid corrosion of steel bars of 12mm and 16 mm diameters was carried out by electrochemistry rapid corrosion, and the anti-pull performance test was carried out, and 12 were established by experimental data Stress-strain relationship images of two diameter rusted rebars with different corrosion rates, which are fitted with experimental data to analyze the law of changes in the dynamic properties after corrosion. The fitting equation of the characteristics of the characteristics of the mechanics such as yield strength, yield strain, limit strength and limit strain of rusted rebar is obtained. By fitting the equation, it can be concluded that with the increase of corrosion rate, the yield strength and limit strength of rebar are constantly decreasing, but yield strain and limit should become irregular changes.