CALCULATED MODEL OF THE TRANSVERSE STRENGTH RESISTANCE OF REINFORCED CONCRETE BENDING ELEMENTS

Abstract

Introduction. The paper presents the design solution of the computational model to the transverse strength resistance of reinforced concrete bending elements, taking into account the influence of bending moments.Materials and methods. The author analyzed the methods of the reinforced concrete elements’ strength calculation by transverse force and also presented the solutions of such problem.Results. As a result, the paper describes the calculation model of the bearing capacity of reinforced concrete elements by the transverse force, taking into account the joint action of transverse force and bending moments. The author uses the analogy between the arch with tightening and the trajectory of the main compressive stresses in the beam (arch effect) to determine the effect of the transverse force on the stress state of normal sections. Moreover, the paper concludes that one of the main regulators of the reinforced concrete elements’ reliability is the calculated value to the concrete shear resistance. The manuscript demonstrates the comparison of the calculation results by the proposed method to the previously obtained experimental data.Discussion and conclusions. The bearing capacity of reinforced concrete elements on the transverse force depends on the strength of the concrete compressed-shear zone over cracks, the size and stress state of which are determined by the arch analogy. The application of the proposed model eliminates the empirical shortcomings of the normative calculation method and greatly simplifies the strength assessment on the bent concrete elements’ design.

Keywords

• reinforced concrete strength
• transverse force
• bending moment and the generalized analysis model
• the resistance of the concrete shear
• arched analogy