Predicting Changes of the State of a Bridge Reinforced with Concrete Superstructures in View of Operational Changes

Abstract

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.

Probabilistic Statistics-Based Endurance Life Prediction of Bridge Structures

“…The durability of bridge structures has always been the focus of scholars' attention. With the continuous research, scholars at home and abroad have a profound understanding of the durability degradation process and deterioration mechanism of bridge structures, and most of them adopt the methods related to accelerated corrosion and have achieved fruitful results [ 14 ]. However, the research on the durability of bridge structures is mostly concentrated in the field of general bridges, and relatively little research has been done on new construction materials.…”