Abstract
With long-term action of the load in concrete and reinforced concrete, an increase in inelastic deformations occurs, which is associated with the creep of concrete. The viscous properties of any concrete are determined by its measure of creep and creep coefficient. Modern software systems make it possible to calculate structures taking into account the rheological properties of concrete. To analyze the stress-strain state of a multi-storey building, taking into account the long-term deformation of concrete, a 45-storey model of a frame building was calculated. The creep characteristics of concrete were set according to Eurocode 2. The results of the calculation showed that the creep of concrete during its long-term deformation leads to a redistribution of forces in the building elements, an increase in floor slab deflections and an increase in the buckling of eccentrically compressed elements. A comparative analysis of the creep coefficients of high-strength concretes according to Eurocode 2 and SP 63.13330.2018 was carried out, which showed the need for an experimental study of the values specified in SP 63.13330.2018 due to a single coefficient for concretes of class B60-B100.
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