STUDY OF THERMAL INFLUENCE ON REINFORCED CONCRETE STAIRWAYS UNDER THE CONDITIONS OF FIRE TESTS
Abstract
The article proposes a test using a horizontal test furnace and measuring tools to determine the effect of temperatures on a reinforced concrete staircase. The work simulates a fire test of a reinforced concrete flight and calculates the thermal effect of a flame on a reinforced concrete flight of stairs.
The results of experimental studies of the temperature characteristics of the stressed and deformed state of a reinforced concrete staircase in the conditions of fire tests under the standard fire temperature regime. In order to carry out the experimental research, a method of fire tests was developed and a study based on fire tests was carried out. As a result, an experimental study was carried out and the main characteristics of the temperature distribution in the cross section and the inner layer of a reinforced concrete staircase were determined, as well as the dependence of the maximum deflection on time was determined.
The obtained experimental results were comparable with the calculated results. When applying statistical criteria, the adequacy of the experiment and calculated data was investigated. Adequacy testing showed that the experimental data are reliable and the calculated data are adequate. It is shown that the obtained calculation data can serve as a basis for a reliable analysis of the problem of fire resistance of reinforced concrete staircases.
