Dependence of the Fire Resistance Limit of a Reinforced Concrete Bearing Wall of a Special Storage Facility on the Load Level

Abstract

The article describes the calculation methodology for determining the fire resistance limit in a reinforced concrete bearing wall of a special storage facility using the refined method recommended by Eurocode 2. The implementation of this method involves mathematical modeling using the implicit method with the use of the finite element method. The aim of the study is to determine the dependence of the fire resistance limit of a reinforced concrete bearing wall of a special storage facility on the level of applied load by 80%, 60%, 40%, and 20% of the bearing capacity of this wall. This paper presents the results of solving the thermo-technical engineering problem of the influence of a standard fire temperature mode, as well as a static calculation under the condition of applying different levels of load (80%, 60%, 40%, and 20% of the bearing capacity) to the reinforced concrete bearing wall of a special storage facility. The obtained results were interpreted in determining the fire resistance limit of the studied structure at different load levels. The fire resistance limit of the bearing wall of a special storage facility was determined by the occurrence of the boundary states of fire resistance to loss of load-bearing capacity and heat-insulating capacity. Based on the results of the calculations, dependence was determined between the fire resistance limit and the level of load on the reinforced concrete bearing wall of a special storage facility. This dependence can be used to determine the fire resistance limit of such walls at different load levels, and it is also possible to use the described methodology in the work to determine the fire resistance limit of such types of structures by a refined approach using the finite element method.