Abstract
In this study, we analysed the thermal field generated on the surface of reinforcing steel through 2D and 3D magnetic field analyses based on previous experiments on the temperature rise characteristics of reinforcing steel, temperature rise characteristics and mechanical characteristics. According to the results of the analysis of transferred heat from heated reinforcing steel to concrete, the actual reinforced concrete was analysed and compared with the actual measurements, and the following conclusions were reached. Through analysing the heat source that is generated by the eddy current and the heat that is transferred from the reinforcing steel to concrete, stress analysis is expected to predict and evaluate various problems that arise when induction heating technology is applied to the site.
Highlights
Since the 1970s, eddy currents have been investigated, gradually moving from the finite difference method to the finite element method
To verify the correctness of the software, we analysed the induction heating of the material of the shape given in Figure 3 and compared it with the results of the experiment
The higher is the frequency, the shallower is the eddy current that is induced in the conductor
Summary
Since the 1970s, eddy currents have been investigated, gradually moving from the finite difference method to the finite element method. Unlike some optical and penetration methods for surface sensing, eddy current methods can detect surface damage as well as damage within a conductor Other techniques, such as ultrasound, thermal imaging, X-ray testing and CT, can realise this function, but they rely on other physical phenomena (ultrasonic waves, heat fields, X-rays, etc.) [5,6]. Induction heating uses an eddy current generated [28,29,30] when a high-frequency magnetic field is applied to a conductor such as a metal. As the physical properties of the material are not constant, the analytical method has a disadvantage and cannot be adapted to general problems, even though many studies have been conducted to verify the results of numerical analysis and understand induction heating [50,51]. From the analysis of the heat source generated by the analysis of the eddy current and the heat transferred from the heated reinforcing steel to concrete, stress analysis is expected to predict and evaluate various problems that occur when induction heating technology is applied to the site
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