Прогнозування міцності та розподілу бокового тиску при виробництві пресованих бетонних дорожніх каменів

Abstract

The thesis is devoted to strength and lateral pressure distribution’s prediction in concrete mixtures by manufacturing of compressed concrete items, using the theory of fuzzy logic and regression analysis. This paper describes the results of theoretical and experimental studies of concrete products’ predicted strength value. A hierarchical classification and formalization of influence factors in design of concrete products with predicted strength is proposed in form of fuzzy sets and their transformations only with bell-shaped membership function for all linguistic variables. The models of strength prediction and lateral pressure distribution in design of concrete products are presented by hierarchical inference system tree which expresses knowledge nested into each other about the influence factors as linguistic variables which specified in the relevant universal set. The analytical relationship between the emerging lateral pressure’s change value by mold height according to its geometry is established. The analytical relationship for different compositions of the mixture with varying duration preceding vibration of lateral pressure distribution by mold height is obtained. A comparative analysis is carried out for the dependence of lateral pressure attenuation value for compressed concrete mixture with theoretical formulas. The results are correlated with experimental data.