DESIGN OF REINFORCED CONCRETE ELEMENTS INCLINED SECTIONS SUBJECTED TO BIAXIAL ACTION OF SHEAR FORCES

In the current standards for the design of reinforced concrete structures no methods for calculating inclined sections with a biaxial action of shear forces are presented. At the same time, a significant part of reinforced concrete structures is subjected to the action of shear forces in two planes. The relevance of the article is determined by the lack of standard methods for calculating of reinforced concrete elements inclined sections for the biaxial action of shear, which forces designers to use simplifications in calculations. The article reviews the Russian and foreign literature on the theory of design of reinforced concrete elements for the action of transverse forces and analyzes the design methods proposed in the current Russian and foreign design standards, as well as in the standards of past years. In the analysis of methods for calculating reinforced concrete elements for the action of transverse forces, consideration is given in various methods for calculating the factors that affect the strength of inclined sections on the action of transverse forces in normal and biaxial bending in two planes, such as the shear span, the angle of inclination of the force plane, the amount of longitudinal tensile reinforcement, the influence of longitudinal forces, size-effect. The main directions for further research of the issue are identified and recommendations are given that summarize domestic and foreign experience.