Tselikova A. Bearing capacity of concrete beam structures reinforced with basalt-plastic reinforcement

The object of research - the joint work of concrete and BFRP in beams exposed to short-term static load; The purpose of the study is to determine the effect of static load on bearing capacity, crack resistance and deformability of structures reinforced with BFRP, taking into account changes in structural factors, improving the deformation method of their calculation based on physical nonlinearity of concrete and reinforcement deformation and development of engineering methods for calculating their bearing capacity; research methods - acquaintance with the experience of using BFRP in Ukraine and developed countries, studying and analysis of literature sources, development of methods for field and numerical experiments using planning theory, general methods of reinforced concrete mechanics, processing and analysis of results, mathematical and computer modeling stress-strain state of experimental elements and comparison of calculation results with experimental data, formulation of basic conclusions, abstraction, analysis, synthesis, induction, deduction; results - the proposed calculation of the bearing capacity of inclined sections of basalt concrete beams with large and medium spans, inclined crack with the use of variable coefficients , and basalt concrete beams with small section span, inclined strip and the use of variable coefficient ; novelty - for the first time the peculiarities of deformation, crack formation and destruction of supporting sections of basalt concrete beams with small, medium and large spans of the section taking into account their complex stress-strain state are revealed. It was found that the replacement of steel reinforcement with more pliable BFRP with all other identical design factors and the nature of the load leads to a decrease in the load-bearing capacity of the inclined sections of the test elements, on average by 47%, increase deflections by 50% and reduce crack resistance by 23%; implemented - in the educational process of OSABA in the preparation of masters in the specialty "Building structures, buildings and structures", as well as in the design practice of LLC "STICON".