TY - JOUR
A1 - Achenbach, Marcus
A1 - Lahmer, Tom
A1 - Morgenthal, Guido
T1 - Identification of the thermal properties of concrete for the temperature calculation of concrete slabs and columns subjected to a standard fireâ€”Methodology and proposal for simplified formulations
JF - Fire Safety Journal 87
N2 - The fire resistance of concrete members is controlled by the temperature distribution of the considered cross section. The thermal analysis can be performed with the advanced temperature dependent physical properties provided by 5EN6 1992-1-2. But the recalculation of laboratory tests on columns from 5TU6 Braunschweig shows, that there are deviations between the calculated and measured temperatures. Therefore it can be assumed, that the mathematical formulation of these thermal properties could be improved. A sensitivity analysis is performed to identify the governing parameters of the temperature calculation and a nonlinear optimization method is used to enhance the formulation of the thermal properties. The proposed simplified properties are partly validated by the recalculation of measured temperatures of concrete columns. These first results show, that the scatter of the differences from the calculated to the measured temperatures can be reduced by the proposed simple model for the thermal analysis of concrete.
KW - SensitivitÃ¤tsanalyse
KW - Thermodynamische Eigenschaft
KW - Fire resistance; Parameter optimization; Sensitivity analysis; Thermal properties
Y1 - 2017
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170331-30929
UR - http://www.sciencedirect.com/science/article/pii/S0379711216301965
SP - 80
EP - 86
ER -