ALGORITHM FOR APPLICATION OF IMPROVED EXPERIMENTAL AND CALCULATION METHOD FOR ASSESSING FIRE RESISTANCE LIMITS OF LOAD-BEARING REINFORCED CONCRETE WALLS

Abstract

The purpose of this work is to substantiate the algorithm for the application of
an improved experimental and calculation method for assessing the fire resistance limit
of load-bearing reinforced concrete walls, which allows to more effectively set the fire

resistance limit of load-bearing reinforced concrete walls with the use of a small-sized
fire installation for the study of the thermal effect of fire on reinforced concrete
structures and taking into account the characteristics of the construction materials and
mechanical loads acting on it during operation.
This work explains and substantiates a simplified step-by-step scheme for
conducting an improved experimental and calculation method for estimating the fire
resistance limit of load-bearing walls. The requirements for a small-sized fire
installation for the study of the thermal effect of fire on load-bearing reinforced
concrete walls are defined and described. An algorithm for conducting an experimental
study on heating a load-bearing reinforced concrete wall according to the standard fire
temperature regime has been developed. The main data, which must be obtained
experimentally for further calculation of the strength of load-bearing reinforced
concrete walls, have been determined. The strength of a load-bearing reinforced
concrete wall was calculated and it was determined that the limit of fire resistance of a
wall 4 m high with a distributed load of 300 t in 60 min does not occur after the loss of
load-bearing capacity, and the resource of the load-bearing capacity is 31%.
An algorithm for the application of the improved methodology for evaluating the
fire resistance limit of load-bearing reinforced concrete walls by the experimental and
calculation method has been developed.