Design Recommendations for Flat Monolithic Reinforced Concrete Slabs

Modern design trends are very different from those of 20 years ago. Complex architectural forms, free planning, individual heating, ventilation and smoke removal systems… All this affects the supporting frame of the building - additional openings, equipment and irregular pitch of columns, increased spans and consoles. All these factors especially affect floor slabs, which are often provided without beams and capitals or only with local reinforcements in certain places. Therefore, it was decided to carry out field tests to establish their strength and deformability. The tests consisted in loading fragments of floor slabs according to previously developed schemes. The total load was approximately equal to that which will be during the operation of the building. The entire experiment was simulated in a computer program LIRA-FEM to control and analyze the data while it was carried out at different loading levels. Based on the obtained results, technical instructions and regulatory documents, recommendations were developed: for the calculation of structural schemes taking into account the non-linear nature of the work of materials; location of technological holes for engineering networks; reinforcement with longitudinal reinforcement; deflection.