In this study, a high-precision inversion method based on field test data to determine the equivalent convection coefficient of a concrete surface was employed when employing the steel–polyurethane composite.
The research method of this article is as follows: (1) Design experiments to measure the temperature inside the concrete block when using steel polyurethane composite formwork; (2) Using temperature field reconstruction technology to invert the equivalent thermal convection coefficient of structural surfaces; (3) Prove that the surface temperature distribution of the structure is uniform; (4) Obtain a numerical simulation method for solving the equivalent thermal convection coefficient of concrete when using steel polyurethane composite formwork.
By analyzing the insulation field test results for the steel–polyurethane composite, two conclusions can be drawn: first, even if the steel groove is large and its wall thickness is very thin, concrete heat is dissipated primarily via the steel groove; and second, the unfilled area of the steel groove can be coated with a thin polyurethane layer, which can have a significant impact on the heat dissipation of the concrete, and the degree of this impact can be quantified. Based on the results, a finite element calculation method is proposed to calculate the equivalent convection coefficient of the concrete surface when employing a steel–polyurethane composite.
The proposed method can simulate and determine the equivalent convection coefficient of the concrete surface when steel grooves of any dimension are sprayed with polyurethane of any thickness.
