Yatsko F. Modeling and prediction of durability of reinforced concrete elements of transport structures on the roads

The thesis solved an actual scientific problem forecast durability of reinforced concrete bridges in the design stage based on the kinetics of corrosion processes in concrete and reinforcement in structural elements of transport structures. Developed a unified analytical model of degradation of the protective layer of concrete and rebar bending element of the bridge with the influence of environmental conditions, loads, corrosion processes and stress-strain state at all stages of the life cycle, from design. Developed a united stochastic model of degradation of protective layer of concrete and reinforcement of bending element of bridge for the implementation in a single Monte-Carlo algorithm, which allows to solve the problem of estimating the resource taking into account the time-varying influence of the environment, stress-strain state, and corrosion processes at all stages of the life cycle, from design. Established the procedure for obtaining the safety factor life, the use of which allows to predict the expected lifetime with a given security for a given level of design reliability. Developed alternative methods to predict resource of reinforced concrete bending elements bridges.