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A platform for research: civil engineering, architecture and urbanism
Acoustic emission analysis as a monitoring method for prestressed concrete structures
In principle acoustic emission analysis (AEA) is not based on states or conditions but on ongoing processes, which in most cases are irreversible. That means that the method is connected with deterioration although being nondestructive itself. It can be used to identify deterioration processes, which with respect to the released energy cover a large range from cracking of concrete to wirebreaks of a post-tensioning tendon. AEA has the potential to be applied for a large range of failure modes with regard to involved energies. At present the detection of breaks of prestressing wires as a field application has reached a reliable level for both grouted and ungrouted tendons. Localization of identified wire breaks can be improved by applying more refined methods that are already used in the laboratory. In the lab, however, events with a much lower energy level can be detected. Localization allows to identify crack planes in the interior of specimen. Filtering and screening methods should be developed to automate the recordings and identify those events where further refined proceeding is worthwhile.
Acoustic emission analysis as a monitoring method for prestressed concrete structures
In principle acoustic emission analysis (AEA) is not based on states or conditions but on ongoing processes, which in most cases are irreversible. That means that the method is connected with deterioration although being nondestructive itself. It can be used to identify deterioration processes, which with respect to the released energy cover a large range from cracking of concrete to wirebreaks of a post-tensioning tendon. AEA has the potential to be applied for a large range of failure modes with regard to involved energies. At present the detection of breaks of prestressing wires as a field application has reached a reliable level for both grouted and ungrouted tendons. Localization of identified wire breaks can be improved by applying more refined methods that are already used in the laboratory. In the lab, however, events with a much lower energy level can be detected. Localization allows to identify crack planes in the interior of specimen. Filtering and screening methods should be developed to automate the recordings and identify those events where further refined proceeding is worthwhile.
Acoustic emission analysis as a monitoring method for prestressed concrete structures
Schallemissionsanalyse zur Überwachungsmethode für vorgespannte Betonbauteile
Vogel, T. (author) / Schechinger, B. (author) / Fricker, S. (author)
2006
13 Seiten, 14 Bilder, 1 Tabelle, 11 Quellen
Conference paper
Storage medium
English
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