Features of restoration of precast reinforced concrete ribbed slabs of coverings of industrial buildings destroyed by bombardment

With the beginning of the fullscale war launched by the Russian invaders, buildings and structures of industrial purposeand critical infrastructure were damaged and destroyed. In case of partial damage to the supporting structures of the coating, it is possible to restore them or replace them with new ones.To replace the destroyed slabs with new ones, it is necessary to use tower cranes. With the existing development and high height of the buildings, it is not possible and economically unprofitable to use tower cranes. In addition, thework must be performed in a short time and with high quality, ensuring sufficient bearing capacity. To solve this problem, it was decided to use monolithic reinforced concrete slabs on corrugated flooring and metal beams. In such slabs, the corrugated flooring plays the role of both permanent formwork and external reinforcement. The arrangement of such slabs is performed on a coating of individual elements.To reduce the time for the work, quickhardening concrete is used [11, 12]. In this case, it is possible to use light lifting mechanisms. It is also necessary to ensure the dimensions of the slabs that existed. These are prefabricated ribbedreinforced concrete slabs with dimensions in plan of 6.0×1.5 m and a section height of 300 mm. For example, the results of the survey and reinforcement of the covering of two buildings of industrial and administrative purpose,performed by employees of the Department of Reinforced Concrete Construction of the KNUBA, were used. The paper presents a methodology for calculating a reinforced concrete slab covering on corrugated board and a complex metal-reinforced concrete beam. The calculations were performed at the construction stage and at the operation stage according to thecurrent standards for this type of structures [1…6, 13…25].