STRENGTH OF REINFORCED CONCRETE ELEMENTS OF A RECTANGULAR PROFILE UNDER OBLIQUE OUT-OF-CENTER COMPRESSION USING A NONLINEAR DEFORMATION MODEL

Abstract

The study of the literature showed the absence of a detailed algorithm for calculating the strength of reinforced concrete elements of a rectangular profile under oblique out-of-center compression using a nonlinear deformation model. This article, which presents such an algorithm, is intended to fill this gap. The peculiarity of the proposed method is that a local coordinate system is introduced for each component of the reinforced concrete section (concrete platform, reinforcing bar) with the beginning of the report located on the neutral axis of the section. This makes it possible to equate the longitudinal deformations to zero, ε ₀ =0, on this axis, and significantly simplify the formulas for determining the curvature and other parameters. The results of calculating the destructive load of Nult using the method are compared with the experimental data presented in the work of M. S. Toryanik. The comparison was made for 7 short samples that differ in cross-section size, reinforcement, concrete class, and load application eccentricity. The similarity of the results is established, the difference is from -6.8 to +6.1 %, which can be considered acceptable, so the proposed method is recommended for implementation in the design standards.