Experimental research of reinforced concrete elements under the action of transverse forces

Almost all reinforced concrete structures to one degree or another work on the perception of shear forces, and the corresponding calculations are decisive when determining the dimensions of the cross section and shear reinforcement ofstructures. At the same time, strength calculations under the action of shear forces are based on specific types of destruction and depend, first of all, onthe scheme (type) of loading. One of these types of failure is the failure due to shearing of concrete in the compressed zone, which occurs along a diagonalcrack that runs from the support to the concentrated force, which is located at a distance of 1...2.5d (d -the working height of the section).Due to the lack of a sufficient number of experimental studies of this type of failure, sufficiently approximate calculation methods are used in practice,which do not take into account the stress-strain state during failure in the zone of action of shear forces due to shearing of concrete in the compressed zone.The article presents the methodology, composition and results of experimental studies of reinforced concrete beams of two series (with transverse and without transverse reinforcement) on the effect of transverse loading.Within the framework of this work, experimental studies of the nature of crack formation, stress-strain state and strength of elements during failure due toshearing of concrete in the compressed zone above an inclined crack and the connection with other possible types of failure - along an inclined strip anddue to crushing of the concrete of the compressed zone above the inclined crack.The main regularities of the development of cracks, the stress-strain state and the strength of the elements destroyed due to the shearing of concrete in the compressed zone above the inclined crack have been established.Conclusions and prospects for further research of reinforced concrete structures, which are destroyed in the area of action of transverse forces, are presented.