A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Monitoring and predicting masonry's creep failure with the acoustic emission technique
The work presented here focuses on the applicability of the AE technique in order to assess damage accumulation in masonry, subjected to the creep failure mode. The use of AE monitoring in masonry structures is highly complicated, as attenuation and sound propagation are dependent on the heterogeneity of the material (including the interface between bricks and mortar, but also cracks and cavities in existing structures). This makes source location in masonry structures rather difficult. Attempts were made by Carpinteri et al., involving the location of cracks during an on-site monitoring campaign. Although a large amount of AE events were detected, only a small percentage of them could be located. Damage location in masonry arch bridges was performed by Tomor et al., by simply applying a large set of AE sensors and identifying the sensors at which most damage was detected. The damage accumulation is quantified using the results of the monitored AE event rates, which evolve as a bathtub-shaped curve during the last phase of the creep tests. The bathtub curves are described using the Weibull function and a relation is found between the detected AE event rate and the time to failure of the specimens.
Monitoring and predicting masonry's creep failure with the acoustic emission technique
The work presented here focuses on the applicability of the AE technique in order to assess damage accumulation in masonry, subjected to the creep failure mode. The use of AE monitoring in masonry structures is highly complicated, as attenuation and sound propagation are dependent on the heterogeneity of the material (including the interface between bricks and mortar, but also cracks and cavities in existing structures). This makes source location in masonry structures rather difficult. Attempts were made by Carpinteri et al., involving the location of cracks during an on-site monitoring campaign. Although a large amount of AE events were detected, only a small percentage of them could be located. Damage location in masonry arch bridges was performed by Tomor et al., by simply applying a large set of AE sensors and identifying the sensors at which most damage was detected. The damage accumulation is quantified using the results of the monitored AE event rates, which evolve as a bathtub-shaped curve during the last phase of the creep tests. The bathtub curves are described using the Weibull function and a relation is found between the detected AE event rate and the time to failure of the specimens.
Monitoring and predicting masonry's creep failure with the acoustic emission technique
Überwachung und Vorhersage des Kriechversagens von Mauerwerk mit der Schallemissionstechnik
Verstrynge, Els (author) / Schueremans, Luc (author) / Gemert, Dionys van (author) / Wevers, Martine (author)
NDT&E International ; 42 ; 518-523
2009
6 Seiten, 8 Bilder, 12 Quellen
Article (Journal)
English
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