DEVELOPMENT OF METHODS OF CALCULATION OF TEMPERATURE DISTRIBUTION IN FLAT REINFORCED CONCRETE SLABS IN THE FIRE
Abstract
The paper presents and analyzes the methods which may help to determine the temperature distribution when the building structures are exposed to the standard temperature regime of a fire.
To implement reliable computational experiments, the mathematical models for reinforced concrete slabs were developed with a description and temperature response to elevated temperatures from the standard temperature regime of a fire, taking into account the equations of thermal conductivity in their numerical solution based on the finite element method.
The calculation of these mathematical models was carried out using the tools of computational thermogasdynamics, describing the process of heat and mass transfer in fired test furnaces when assessing the fire resistance of reinforced concrete slabs.
The results of the computational experiment have shown that the indicators of temperature distribution in the cross-section of a reinforced concrete flat slab are quite reliable in comparison with the temperature nomograms recommended by the Eurocode 2 [10].
On the basis of the obtained data and regularities, a method was developed for determining the temperature distribution indicators in the cross-sections of reinforced concrete flat slabs, which is the basis for calculating the fire resistance limit of these building structures.
