Results of Experimental Investigations of Reinforced Concrete Wall Elements According to the Standard Temperature Mode of Fire

Abstract

Methods for determining the actual limit of fire resistance of reinforced concrete building structures in case of fire are analyzed. On the basis of the offered methods the technique which gives the chance to receive data of temperature distributions on a surface of a fragment of a wall and in its section is created. The method of conducting a fire test to calculate the limit of fire resistance of a small fragment of the load-bearing wall and verify the reproducibility of experimental data is described. The distribution of temperatures over the entire area of the fire furnace, the studied fragment was checked and the obtained results were analyzed. According to the results of this work, the following was established: the aim of the work was to obtain the results of temperature distributions on the surface, in the points of integration in the cross sections of fragments of reinforced concrete walls for further calculation of their fire resistance limit and check reproducibility of experimental data. It is established that the temperature obtained as a result of the fire test corresponds to the standard temperature of the fire and this method of fire test to determine the temperature distributions of a small fragment of the load-bearing wall in fire conditions is acceptable for use. The error between the experimentally determined and theoretically calculated limit of fire resistance is not more than 3%.

Study of the thermal effect of fire on fragments of reinforced concrete columns based on the results of experimental tests

“…An analog-to-digital conversion (ADC) module, described in [4], was used to obtain digital temperature values in the places where the thermocouple was installed. The PLX DAQ plug-in for Microsoft Excel was used to process the received data, which allows you to see numerical values of Figure 4 shows the furnace chamber heating graphs according to the readings of each of the installed thermocouples.…”

“…In addition, it is non-ecological. Therefore, works [4,5] proposed the idea of conducting an experiment on heating small-sized elements of reinforced concrete structures in a compact fire installation according to the standard fire temperature regime. Then verification of experimental data and calculation is carried out.…”

“…This work is a continuation of the cycle of works, in particular [4,5], where a small-sized installation is used for conducting experiments to study the thermal effect of a fire on building structures, as well as works [8,9], which note the influence of the uniformity of heating of the investigated structure during its fire resistance tests. This work shows and analyzes the results of experiments on heating a small-sized element of a reinforced concrete beam according to the standard fire temperature regime.…”

“…Presentation of the main material of the study with a full justification of the results. To conduct the experiment, a small-sized installation was used to study the thermal effect of fire on building structures [4,5].…”