Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Health monitoring of a reinforced concrete bridge bent-cap using piezoceramic materials
This paper presents a new PZT-based health monitoring method for large-scale reinforced concrete structures. Piezoceramnic patches were imbedded in the reinforced concrete structures prior to casting. The piezoceramic patches were used as both actuator and sensors to detect possible cracks inside the reinforced concrete structure. Wavelet packet analysis is used to analysis the recorded data. Experimental results show that the piezoceramic materials can be successfully applied to the health monitoring of large-scale concrete structures. The transmission energy between the actuator and sensor drops with the increasing of the width of internal cracks. The transmission-energy-based damage index reflects the severity of the internal cracks and saturates when external cracks are detectable. From the experiment results, it is evident that the wavelet packet analysis can be successfully applied in extracting the feature vector from the signals. The proposed method has the potential to be applied to the health monitoring of in situ large-scale reinforced concrete structures with economical cost without using additional bulky equipment.
Health monitoring of a reinforced concrete bridge bent-cap using piezoceramic materials
This paper presents a new PZT-based health monitoring method for large-scale reinforced concrete structures. Piezoceramnic patches were imbedded in the reinforced concrete structures prior to casting. The piezoceramic patches were used as both actuator and sensors to detect possible cracks inside the reinforced concrete structure. Wavelet packet analysis is used to analysis the recorded data. Experimental results show that the piezoceramic materials can be successfully applied to the health monitoring of large-scale concrete structures. The transmission energy between the actuator and sensor drops with the increasing of the width of internal cracks. The transmission-energy-based damage index reflects the severity of the internal cracks and saturates when external cracks are detectable. From the experiment results, it is evident that the wavelet packet analysis can be successfully applied in extracting the feature vector from the signals. The proposed method has the potential to be applied to the health monitoring of in situ large-scale reinforced concrete structures with economical cost without using additional bulky equipment.
Health monitoring of a reinforced concrete bridge bent-cap using piezoceramic materials
Zustandsüberwachung des Jochaufsatzes einer Stahlbetonbrücke mit Hilfe piezokeramischer Stoffe
Song, G. (Autor:in) / Gu, H. (Autor:in) / Mo, Y.L. (Autor:in) / Hsu, T.T.C. (Autor:in) / Dhonde, H. (Autor:in) / Zhu, R.H. (Autor:in)
2004
4 Seiten, 4 Bilder, 1 Tabelle, 6 Quellen
Aufsatz (Konferenz)
Englisch
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