Method for detecting temperature distribution, temperature gradient, thermal insulation effect and local solar radiant heat of concrete structure

Abstract

The invention discloses a method for detecting temperature distribution, temperature gradient and thermal insulation effect of a concrete structure and a method for detecting local solar radiant heat of a concrete structure. The method for detecting temperature distribution comprises the following steps: arranging temperature sensors at (n+1) numbered measuring points; measuring temperatures of the (n+1) numbered measuring points at a set time; and calculating the temperature distribution of the concrete structure at the set time based on the set temperature distribution curve T(x) =k1+k2x+k3x2+k4x3+...+kn+1xn of the concrete structure as well as the distances and the temperatures of the (n+1) numbered measuring points. The temperature gradient, the thermal insulation effect and the localsolar radiant heat are calculated on the basis of the temperature distribution. The method can conveniently and quickly calculate the temperature distribution curve of the concrete structure, the temperature gradient of the concrete structure, the surface coefficient of heat transfer of the concrete structure and the local solar radiant heat of the concrete structure, thereby providing a direct reference for the establishment of temperature control and crack control measures.

Description

technical field [0001] The invention relates to a method for detecting the temperature distribution, temperature gradient, heat preservation effect and local solar radiant heat of a concrete structure. And the method for detecting the local solar radiation heat. Background technique [0002] Concrete is a thermal material. Shortly after pouring during the construction period, due to the hydration reaction of cement, the temperature continues to rise. At the same time, concrete is an inert material. The internal temperature rises greater than the surface temperature, forming a temperature difference between the inside and outside; The emission is greater than that of the internal heat, and the temperature difference between the inside and outside is further expanded. [0003] Whether in the construction period or the operation period, the drastic change of the ambient temperature has a great influence on the temperature difference between the inside and outside of the concre...

AI Technical Summary

Problems solved by technology

Although the linear interpolation method is simple, its accuracy is too low to be applied in practical engineering

Although the calculation accuracy of the quadratic interpolation method is higher than that of the linear interpolation method, when the concrete structure is exposed to cold waves or sudden temperature changes in the external environment, or cooling water pipes are buried inside the concrete structure, it cannot fit the concrete structure well. Temperature distribution and temperature gradient of the structure, especially the temperature distribution and temperature gradient of the concrete structure around the cooling water pipes

[0006] The heat preservation effect can be evaluated by the surface heat dissipation coefficient. At present, under different heat preservation measures, the surface heat dissipation coefficient of concrete structures is generally obtained through empirical formulas, and the surface heat dissipation coefficient obtained through empirical formulas is difficult to truly reflect The surface insulation effect of the concrete structure on the actual engineering construction site brings inaccurate factors to the formulation of temperature control measures

[0007] In addition, at present, most of the solar radiant heat is calculated through empirical formulas based on the estimated temperature gradient data. In actual engineering, it can be found that the solar radiant heat obtained by this method cannot reflect well and truly The solar radiation heat characteristics of the concrete structure location should be improved and the calculation method

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