Back-Analysis of Concrete Thermal Parameters Based on Experimental Measurements

Abstract:

Based on a test and back analysis,the thermal parameters close to practice can be obtained,which have great influence on the analysis results of temperature field and thermal effects for solar concrete structures.Assuming that the temperature distribution close to the concrete surface is the quadratic function of the coordinate,the back-analysis equations of thermal conductivity,heat transfer coefficient and absorption coefficient of solar radiation are derived based on one dimension Fourier equation of heat conduction and thermal boundary conditions.And the back-analysis equations for coefficient of thermal expansion is presented based on the physical explanation.Finally back-analysis of thermal parameters for a concrete slab is made through the measured temperature,strain and meteorological data.

Key words:concrete; thermal parameter; experimental measurement; solar; back-analysis