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The article characterises the features of compressed concrete deformation under the action of long-term loads. The aim of the research presented in the article was to establish the analytical dependence of determining the long-term strength of compressed concrete. It hypothesises that the specific potential energy of its ultimate deformation (destruction) is invariant and independent of the concrete loading mode. Other researchers’ critical analyses have confirmed the functional dependence of the level of long-term strength of compressed concrete not only from its standardised elastic-plastic characteristics but also from the concrete strain rate. The proposed methodology evaluation for determining the long-term strength of compressed concrete is reduced to a comparison of the relevant theoretical calculated results with the various researchers’ published experimental data.
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