Determination of stiffness and curvature of two-layer reinforced concrete beams with concrete of frame structure in the compressed zone

Abstract

Determination of stiffness and curvature of two-layer reinforced concrete beams with concrete of frame structure in the compressed zone

Mailyan D.R., Nesvetaev G.V., Kolleganov N.A.

Incoming article date: 22.02.2023

Based on the research conducted by the authors, data on the stiffness and curvatures of reinforced concrete beams with a layer of various heights of concrete with frame structure are presented. Stiffness, curvature and deflections are given for cases of absence and presence of cracks in the tensile zone of beam. Formulas for describing changes in the stiffness and curvature of sections depending on the magnitude of the moment are obtained. The influence of the thickness of the layer of concrete with frame structure and the diameter of the working reinforcement on the change in the stiffness of the sections is established. The regularity of changing the position of the neutral axis for single and double-layer beams depending on the beam parameters.

Keywords: concrete of frame structure, stiffness, curvature, deflection, layered structures, bending moment, neutral axis