Consideration of cumulative effects in concrete structures at low temperatures impact

The design of reinforced concrete elements for a determined service life in severe climatic conditions should provide an additional resilience resource in accordance with their serviceability limit state. For its statistical justification, it is proposed to use dynamic models of the change in freezing and thawing cycles (FTC) of reliability index β, and, as its minimum (at most) permissible value, the value corresponding to the required level of reliability. Statistically representative experimental data of kinetics are presented for FTC of index β, determined from the change in various controlled parameters of strength and deformability of concrete.