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2 Civil and Environmental Engineering Reports

2 2019

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Predicting changes of the state of a bridge reinforced with concrete superstructures in view of operational changes

Ovchynnykov Pavlo, Dubinchyk Olha, Tiutkin Oleksii, Kildieiev Vitalii, Sedin Volodymyr, Bikus Kateryna

Civil and Environmental Engineering Reports

2019

Vol. 29, no. 3

134--152

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.

Influence of the Static Loading of a Raft Unconnected to a Pile on the Pile Displacements Tested in Field Conditions

Sedin Volodymyr, Bikus Kateryna, Kovba Vladyslav, Kononov Denys, Zahilskyi Vitalii

Civil and Environmental Engineering Reports

2019

Vol. 29, no. 2

22--30

We present the results of a static pile-raft interaction test in field conditions. The pile and the raft were unconnected. The static loading on the raft affected the displacements of the pile due to the skin friction. The displacements were also observed for another pile, placed at the 3-metre distance.