Calculation of reinforced concrete rod structures of bearing frame systems of multi-storey buildings

In the context of limited land resources and their ever-increasing cost, cities cannot expand immensely in breadth, they increase, and will grow upwards due to the growth in the number of storeys of residential, civil and public buildings. With an increase in the number of storeys, buildings become complex and responsible engineering structures. Thousands of people are simultaneously in a residential and administrative high-rise building, the life and well-being of one or the other openly depend on the knowledge and skills of designers and builders. In this regard, cutting a multi-storey frame frame into prefabricated elements has a significant impact on the technical and economic performance of the building. The mass, geometric dimensions, configuration of prefabricated elements, the manufacturability of their manufacture and installation, as well as the number of assembly units and their connections, the composition of the latter but their functional purpose depend on it. In calculations, the most important phase is the construction of calculation models for individual elements and carrier systems as a whole, at the same time, the calculation model must be elementary and freely implementable using computer technology. At the present stage, calculation methods that take into account cracking and nonlinear compliance of joints to the operation of frames are not sufficiently developed, and the effect of the effect of unloading the middle zone of sections on the feature of the stress-strain state of sections has not been determined even for the stage of work before cracking, due to the unsolved problem of opening the internal static indefinability. The relevance of this article is the formation of a discrete calculation model in the form of the method of concentrated deformations and analytical, using it to calculate reinforced concrete bar structures of the load-bearing systems of multi-storey buildings.