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Problem. The article proposes the use of energy analysis to describe the deformation characteristics of the structural system, and specifies the criteria that form the basis of the BEO method, which allows for an engineering assessment of the quality of the designed load-bearing structures. Goal. The goal is to implement the spread and adaptation of the variant design problem. The theoretical basis of the approach is the construction of an energy portrait of the structure. Methodology. To implement this approach, calculations were made for three variants of the superstructure of the existing five-story building, which is made of a prefabricated reinforced concrete frame of the II-22...II-24 series. A monolithic reinforced concrete frame, a metal frame, as well as a metal frame with an overlap and covered with a steel-reinforced concrete structure of a new type are adopted as superstructure options. In order to comprehensively consider the described method, as well as in order to give the proposed structure of the overlap positive qualities, an auxiliary task was additionally considered, namely, the inclusion of shear ties connecting the upper belt of the structure with a reinforced concrete slab.. Results. The comparison of the proposed solutions was carried out by comparing the consumption of materials required for the superstructure, components of the stress-strain state, as well as the values of the introduced energy criteria. Originality. On the basis of calculations, the results of the comparison of frames with different superstructure options are presented. A comparison of the potential energy density fields of deformation in reinforced concrete slabs of superstructure variants under the action of a uniformly distributed load is presented. The results of the comparison of the received technical and economic indicators for the accepted options determined the formulated conclusions. Practical value. Energy analysis of the behavior of the structural system, under the action of a set of loads of different nature, is an effective procedure for evaluating and examining project solutions (variant design), their rationality, and building a durability forecast. |
