Анализ результатов расчета железобетонных плит с дисперсным армированием при упругой и неупругой работе нормальных сечений

Abstract

The article provides an analysis of the calculation results of reinforced concrete slabs with dispersed reinforcement for elastic and inelastic operation of normal sections and various forms of stress diagrams. These materials include classical reinforced cement (the bar diameter is 1.2 mm with a pitch of 10 mm) and its variant, heavy reinforced cement (the bar diameter is 3-5 mm with a pitch of 15-30 mm). Reinforcement is applied evenly over the entire thickness. There has been found out that during elastic operation of sections and triangular stress diagrams, the calculated bearing capacity of the slabs is determined by the concrete strength in the compressed zone, and it is much lower than the actual one. In the plastic operation of sections and with rectangular stress diagrams, the design bearing capacity exceeds the actual one averagely up to15 %.The calculated bearing capacity of plates with dispersed reinforcement is recommended to be determined with parabolic stress diagrams.