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Finite element modelling of bridge piers subjected to eccentric load combined with reinforcement corrosion
Highlights A comprehensive corrosion damage model is adopted from the literature. The corrosion is simulated by incorporating the reinforcement mechanical and geometrical degradation, concrete core and cover deterioration, and bond-slip response degradation. The accuracy of the adopted damage model is investigated by comparisons with available test data from the literature. The mid-third of the bridge pier is assumed to be subjected to possible corrosion-induced damage. A stage-based corrosion scenario is introduced during different stages of the bridge's service life. A comprehensive 3D nonlinear finite element analysis is proposed to investigate the structural performance of RC bridge piers subjected to the combination of staged corrosion-induced damage and axial load at different eccentricities. The present model is efficiently and quantitatively capable of capturing the gradual reduction of ultimate capacity and rigidity and also the failure mechanism of the corroded bridge pier under eccentric load.
Abstract Corrosion of reinforcing steel in reinforced concrete infrastructure has been identified as the leading cause of concrete deterioration in North America. As the most critical bridge element, piers are more susceptible to reinforcement corrosion, especially in coastal areas and cold regions due to the application of de-icing salts. The combination of second-order effects and local nonlinearity dictates the failure mode of slender and eccentrically loaded columns. Degradation effects would be more critical in the presence of corrosion, at which the nonlinearity effects become more dominant. A comprehensive corrosion damage model is adopted from the literature in the present study. A stage-based corrosion scenario is then proposed to study the detrimental corrosion effects on the ultimate capacity, rigidity, and ductility of bridge piers subjected to eccentric load through finite element analysis. The interaction diagram of the corroded pier is then generated at different corrosion stages to introduce new safety margins. The accuracy of the proposed model is investigated by comparisons with available test data from the literature.
Finite element modelling of bridge piers subjected to eccentric load combined with reinforcement corrosion
Highlights A comprehensive corrosion damage model is adopted from the literature. The corrosion is simulated by incorporating the reinforcement mechanical and geometrical degradation, concrete core and cover deterioration, and bond-slip response degradation. The accuracy of the adopted damage model is investigated by comparisons with available test data from the literature. The mid-third of the bridge pier is assumed to be subjected to possible corrosion-induced damage. A stage-based corrosion scenario is introduced during different stages of the bridge's service life. A comprehensive 3D nonlinear finite element analysis is proposed to investigate the structural performance of RC bridge piers subjected to the combination of staged corrosion-induced damage and axial load at different eccentricities. The present model is efficiently and quantitatively capable of capturing the gradual reduction of ultimate capacity and rigidity and also the failure mechanism of the corroded bridge pier under eccentric load.
Abstract Corrosion of reinforcing steel in reinforced concrete infrastructure has been identified as the leading cause of concrete deterioration in North America. As the most critical bridge element, piers are more susceptible to reinforcement corrosion, especially in coastal areas and cold regions due to the application of de-icing salts. The combination of second-order effects and local nonlinearity dictates the failure mode of slender and eccentrically loaded columns. Degradation effects would be more critical in the presence of corrosion, at which the nonlinearity effects become more dominant. A comprehensive corrosion damage model is adopted from the literature in the present study. A stage-based corrosion scenario is then proposed to study the detrimental corrosion effects on the ultimate capacity, rigidity, and ductility of bridge piers subjected to eccentric load through finite element analysis. The interaction diagram of the corroded pier is then generated at different corrosion stages to introduce new safety margins. The accuracy of the proposed model is investigated by comparisons with available test data from the literature.
Finite element modelling of bridge piers subjected to eccentric load combined with reinforcement corrosion
Zaghian, Sepideh (author) / Martín-Pérez, Beatriz (author) / Almansour, Husham (author)
Engineering Structures ; 283
2023-02-14
Article (Journal)
Electronic Resource
English
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