Fire resistance analysis of reinforced concrete structures subjected to hydrocarbon fire exposure

Critical infrastructure facilities of Ukraine, in particular energy generating, are often the target of terrorist attacks by the Russian Federation army. Such facilities require engineering protection of buildings, structures, and roofs. The occurrence of fire may accompany destruction and damage to building structures due to explosive effects.Fires at critical infrastructure facilities are characterized by high intensity. The hydrocarbon fire curve is characterized by a rapid increase in temperature to 1100°C in the first 5 minutes after ignition.Fire resistance analysis according to a hydrocarbon fire curve can only be performed using advanced methods. Tabulated data and simplifiedmethods are given for standard fire only. This article presents the results of the fire resistance analysis of cast-in-place reinforced concrete walls, columns, and slabs for the hydrocarbon fire curve. The structures for the fire resistance analysis were taken as typical for protective structures around critical energy infrastructure facilities.Thermal analysis of structures subjected to fire that develops under the hydrocarbon fire curve: walls and slabs exposed to fire at one side and columns exposed to fire at four sides. The residual load-bearing capacity of reinforced concrete structures after fire exposure according to the hydrocarbon fire curve was calculated for their reduced cross-section.