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Acoustic emission modelling of concrete hinge joint models

Holford, Karen Margaret ORCID:, Pullin, Rhys ORCID: and Lark, Robert John ORCID: 2004. Acoustic emission modelling of concrete hinge joint models. Journal of Acoustic Emission 22 , pp. 166-172.

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Currently in the United Kingdom there are over 100 bridges containing hinge joint components,introduced to simplify and standardise designs. Visual inspection of hinge joints notedbridge deck waterproofing failure, which can cause steel reinforcement bar corrosion. This reinforcement is crucial to the integrity of the joint, and the loss of reinforcement section can inducehigher stresses leading to eventual failure by yielding. The Transport Research Laboratory createda model of two hinge joint assemblies typical of those found in reinforced concrete slabbridges. The model had notched reinforcement bars at the hinges. The aim of this investigationwas to determine the effectiveness of the acoustic emission (AE) technique in detecting and locatingthe cracking of concrete at the throat. AE sensors were attached to the steel reinforcementbars using waveguides and to the concrete face of the model. The model was statically loadeduntil failure. To allow the visual inspection and logging of concrete cracking around the throat,the load was applied in stages with a brief hold period between each stage. AE results showed that it was possible to identify and locate cracking of the concrete around the throat and that this technique needs to be further evaluated on bridge structures under live loading.

Item Type: Article
Schools: Engineering
Centre for Advanced Manufacturing Systems At Cardiff (CAMSAC)
Uncontrolled Keywords: acoustic emission ; bridges ; concrete hinge joints.
ISSN: 0730-0050
Last Modified: 05 Jan 2024 06:09

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