Danylenko D. Load-bearing capacity of beams damaged by power cracks, reinforced with metal jackets

The object of research – reinforced by prestressed metal clamps damage through through normal and cross inclined force cracks beam reinforced concrete elements exposed to low-cycle alternating loads of high levels; the purpose of the study - to obtain the results of experimental - theoretical studies of bearing capacity, crack resistance and deformability reinforced by prestressed metal clamps damaged by through force normal and cross inclined cracks of reinforced concrete under the action of low-cycle alternating load of high levels; improvement of existing and development of new physical and calculation models of bearing capacity of the specified reinforced concrete under the action of the specified load; research methods - collection, study and analysis of literature sources, formulation of research problems, development of methods of field and numerical experiments using mathematical planning theory, modern methods of measuring deformations of materials, processing and analysis of results, mathematical and physical modeling of stress-strain state of research elements , comparison of results of calculations with experimental data, formulation of the basic conclusions and development of recommendations on introduction of researches in design practice; results - experimentally proved the possibility and expediency of restoration and reinforcement of reinforced concrete beams damaged by force cracks due to three-sided compression, the mechanism of their deformation, crack formation and destruction is established; novelty - the first proposed method and device for restoration and reinforcement of reinforced concrete beams damaged by force cracks, fixed by the patent of Ukraine for the invention, investigated the influence of structural factors and external factors on the bearing capacity of damaged through cracks reinforced concrete elements. Reinforced with pre-tensioned metal clips; developed physical and improved calculation models of joint operation of the system "damaged beam - metal reinforcement clip"; introduced - in the educational process OSACEA in the preparation of masters in the specialty "Building structures, buildings and structures", as well as in the design practice of LLC "STIKON".