Saving of metal when using new types of reinforcement and calculations using the computer program "OM SNiP Reinforced Concrete"

Introduction. The methodology and results of research on the effectiveness of the use of new reinforcement in reinforced concrete structures with a multi-row profile of classes: A500SP and A600SP (six-row), Au500SP (four-row). The main attention is paid to the second limit state – the calculation of crack resistance. Using specific numerical examples, the results obtained when using reinforcement with a multi-row profile of classes A500SP and A600SP, Au500SP and class A500 with a double-row crescent profile are compared. The possibilities of a significant reduction in consumption in the case of multi-row fittings have been identified. Calculations were performed in the computer program "OM SNiP Reinforced Concrete". Aim. To identify the advantages of using A500SP, A500SP, A600SP reinforcement with a new multi-row profile in the design of reinforced concrete structures. To show the possibilities of practical realization of advantages in the calculations of the HPE program "OM SNiP Reinforced Concrete". Materials and methods. The studies were carried out for two types of structures. The first type included eight sections of elements working on bending, oblique bending, off-center compression, oblique off-center compression. In these sections, reinforcement of A500 and A500SP (Au500SP) classes were selected to ensure regulatory requirements for crack resistance. The second type was the reinforced concrete floor of the building. The calculations took into account the requirements of strength and crack resistance. Two types of calculations were performed: efforts were determined and A500 fittings were selected according to the LIRA-SAPR program"; rebar A500SP (Au500SP) was selected according to the "OM SNiP Reinforced Concrete program for the efforts received in the LIRA-SAPR program. Results. The use of reinforcement of the A500SP, A500SP, A600SP classes with a new multi-row profile allows for metal savings of up to 25 %, compared with the currently used A500, A600C classes with a double-row crescent profile. Conclusions. Reinforcement rods of A500SP, Au500SP, A600SP classes are recommended for wide implementation using the OM SNiP Reinforced Concrete program in the design.