Planning Experiment for Researching Reinforced Concrete Beams with Damages

In the article, theoretical researching of the influence of damage in the compressed area in bending reinforced concrete elements is presented. The main attention is paid to the comparison of the impacting two factors on the bearing capacity: level of loading and the loss of the cover in the compressed area. In the first step, carried the formation of a matrix of the dependence impact of each factor on the bearing capacity with the subsequent determination of coefficient of influence and the formation of the regression equation. Analyzing the regression equation, obtained results of the impact of each factors, and their interaction, on the bearing capacity of the element. Second step is modeling of the experiment research using software “Femap with NX Nastran”. Thereafter, there was created a table of the distribution factors and their combinations with the indications of their impact on the carrying capacity of the model. It is possible to concluding, that the main factor is the initial level of loading, when the bending reinforced concrete beams received damages. The obtained results show the relevance and expediency of conducting experiments with the aim of determination of the residual bearing capacity in damaged reinforced concrete elements.