Evaluation of the effective thermal properties of building materials under the influence of a standard fire mode for solving fire resistance tasks
DOI:
https://doi.org/10.33408/2519-237X.2022.6-1.5Keywords:
fire resistance, experimental studies, coefficient of thermal conductivity, volumetric heat capacity coefficient, finite element analysis method, parametric optimizationAbstract
Purpose. On the basis of experimental data obtained in a chamber electric furnace and numerical modeling in the system of finite element analysis, to determine the dependence of thermal properties on the temperature of building materials under the influence of a standard fire mode to solve fire resistance tasks.
Methods. Experimental studies, finite element analysis method, parametric optimization method.
Findings. An analysis was made of earlier experimental studies in a chamber electric furnace of samples of cement boards reinforced with fiberglass (density 1100 kg/m3) and mineral wool boards (density 37 and 160 kg/m3) under stationary and non-stationary heating conditions. Calculated finite element models of heating samples in the system of finite element analysis have been developed. Using the parametric optimization method, the dependences of the effective thermal conductivity coefficient and the effective volumetric heat capacity of cement boards reinforced with glass mesh (density 1100 kg/m3) and mineral wool boards (density 37 and 160 kg/m3) on temperature were determined to solve fire resistance problems.
Application field of research. The obtained dependences of effective thermophysical characteristics can be used in assessing the fire resistance of building structures, as well as in developing fire-resistant solutions for structural elements of buildings.
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