Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Viability of monitoring acoustic emission from crack growth in bridges
Detecting cracks and monitoring their growth in bridge structures is an objective of structural health monitoring. Because of the uncertainty as to where such cracks might form methods that provide surveillance of a broad area are needed. Monitoring acoustic emissions (AE) from the formation and growth of such cracks has been explored as a possible approach. Issues include differentiating between environmental noises [rain, electromagnetic interference from a variety of sources], structural noise [connector rubbing, crushing of debris and corrosion product in between the crack surfaces], and emission from plastic zone formation and crack advance. In addition, whether uninterrupted monitoring is needed or whether strategies that awake dormant sensors can be used dictate whether real-time processing or data mining of massive amounts of data are necessary. Enormous amounts of AE data were analyzed and the conclusion must be made that although AE were detected the emission are sporadic with few distinct AE events. Distinctive seismic surface pulses were detected and appear to be related to fracture of brittle inclusions. The amounts of AE detected were insufficient to provide a reliable means of monitoring crack extension.
Viability of monitoring acoustic emission from crack growth in bridges
Detecting cracks and monitoring their growth in bridge structures is an objective of structural health monitoring. Because of the uncertainty as to where such cracks might form methods that provide surveillance of a broad area are needed. Monitoring acoustic emissions (AE) from the formation and growth of such cracks has been explored as a possible approach. Issues include differentiating between environmental noises [rain, electromagnetic interference from a variety of sources], structural noise [connector rubbing, crushing of debris and corrosion product in between the crack surfaces], and emission from plastic zone formation and crack advance. In addition, whether uninterrupted monitoring is needed or whether strategies that awake dormant sensors can be used dictate whether real-time processing or data mining of massive amounts of data are necessary. Enormous amounts of AE data were analyzed and the conclusion must be made that although AE were detected the emission are sporadic with few distinct AE events. Distinctive seismic surface pulses were detected and appear to be related to fracture of brittle inclusions. The amounts of AE detected were insufficient to provide a reliable means of monitoring crack extension.
Viability of monitoring acoustic emission from crack growth in bridges
Funktionstüchtigkeit bei der Schallemissionsüberwachung des Risswachstums in Brücken
Duke, J.C. jun. (Autor:in) / Horne, M.R. (Autor:in)
2006
8 Seiten, 1 Bild, 15 Quellen
Aufsatz (Konferenz)
Datenträger
Englisch
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