Abstract
• Early deterioration damage of a bearing segment is investigated via AE technique. • Effect of sustained load on spatial variability of steel corrosion is studied. • Spatial correlation between steel corrosion and surface corrosion cracks is studied. For the reinforced concrete (RC) shield tunnel in coastal regions, premature corrosion damages are always investigated after construction because of the combined effects of sustained earth and water pressures and marine chloride attacks. To evaluate the performance of these deteriorated shield tunnels, the effect of sustained load on structural performance degradation must be considered. In this paper, an experiment was conducted using the corrosion-accelerated specimens of a tunnel segment. The deteriorating damage processes of the RC segmental specimens were illustrated via acoustic emission (AE) with an emphasis on the influence of sustained load. Based on AE intensity analysis, intensive cracking damages for a bearing segment were identified when the average steel cross-section area losses increased from 0.5% to 2%. Meanwhile, the spatial variations of corrosion damage were discussed incorporating the impact of tensile load. The effect of tensile load on spatial correlation of distribution between steel cross-section area loss and surface corrosion cracks was experimentally verified. The experimental outcomings can help in modelling a random field-based probabilistic model associated with non-uniform steel corrosion in the bearing segmental linings.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
