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Predicting Changes of the State of a Bridge Reinforced with Concrete Superstructures in View of Operational Changes
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by
Pavlo Ovchynnykov,
Olha Dubinchyk,
Oleksii Tiutkin,
Vitalii Kildieiev,
Volodymyr Sedin,
Kateryna Bikus
Published
in Civil and Environmental Engineering Reports
by Walter de Gruyter GmbH.
2019 Volume 29, p134-152
Abstract
<jats:title>Abstract</jats:title>
To solve the problem of predicting the service life of superstructures, this work proposes the basis and methodological developments of creep theory with increasing loads as well as regression analysis of the results of laboratory experiments. The main limitation in terms of reinforcement is corrosion in the concrete cracks, which was determined during laboratory experiments. Based on the results, the approximate analytical dependences concerning reinforcement corrosion depth change over time at a constant value of crack width were selected. The paper substantiates the validity of the analytical dependences as a result of regression analysis; it proposes formulae for determining the corrosion rate of rebars in reinforced concrete superstructures. The obtained analytical dependences allowed for the developing of a process for predicting changes to the state of the superstructure in light of operational changes.
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