Scientific paper ID 1560 : 2018/1

The purpose of this report is to compile an algorithm by programming for make to interactive diagrams (a bending moment-normal force relationship) in which the input process data are parametric.

With MS EXCEL are made procedures for analysis-verification of the non-center-pressed R.C. cores. Cores has shape of cross section- П and L.

In the report are shown as a cross sections of reinforced concrete wall constructions. There are definition for a core. There is a definition of an interaction diagram, as well as the way of constructing the curve (expressions for: deformations, tensions in concrete and reinforcement bars, effort). Are shown the conditional separation (transformation) of the П-core, respectively in I and T forms, is shown for the action of bending moments in the different directions. The analyzes the relevant cases and sub-cases and conditions for the value of the pressure zone.

The first, second and third examples are respectively: for the П-core (with shown geometric dimensions) with the corresponding transformations, L-contour (with shown geometric dimensions) analyzed as L-cross-section with T-section conditions, L-contour, analyzed by transformation in T-section, realized through theoretical postulates. The report draws conclusions and interaction diagrams are constructed: in the case of accepted longitudinal reinforcement (number and spacing between reinforcement bars, class of reinforcement steel), respectively for final reinforced zones and stalks, in case of varying concrete strength classes.