Karpuk F. Strength, crack resistance and deformability of prebased areas of prestressed brand ferroconcrete elements

Object of researches: prestressed concrete beam milling, cross-sectional with a longitudinal and transversal armature; a purpose is development of scientific positions on determination of the stress-stain state of prestressed tee concrete elements, the development of method of calculation of durability on bearing areas, and also verification of possibility of application of the most widespread methods for determination of crack and deformability of experimental beams; methods are experimentally-theoretical with the use of methods of the theory of experiment planning, the deformation method, criteria for concrete strength and reinforcement, comparing of experimental information to the results of calculation and their analysis; results - adapted layered deformational model of the stress-strain state of prestressed tee concrete elements is development and addition of deformation method of calculation of constructions of the reinforced concretes, stopped up in basis of State Build Norms of Ukraine, which are developed, the engineering method of calculation of durability of the noted constructions is improved comfortable for the practical use; novelty - obtained new experimental information on stress stain behavior of prestressed tee concrete elements with simple bending down to the exhaustion of their carrying capacity on bearing areas; it is established the mechanism and forms of destruction of bearing sites investigated tee concrete elements, depending on the ratio of studied factors, refined layered deformational model for calculating the stress-strain state of migrating and bearing sections of prestressed tee concrete elements; refined engineering method for calculating the strength of bearing sections of prestressed tee concrete elements an inclined crack and the inclined compressed strip. implemented - design practices OOO Stikon "," Chernomorgidrostroy, PSMO "Odesstroy" and the learning process in training specialists and masters.