A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Embedded 3D electromechanical impedance model for strength monitoring of concrete using a PZT transducer
The electromechanical (EM) impedance approach in which piezoelectric ceramics (PZT) simultaneously act as both a sensor and an actuator due to their direct and inverse piezoelectric effects has emerged as a powerful tool for structural health monitoring in recent years. This paper formulates a new 3D electromechanical impedance model that characterizes the interaction between an embedded square PZT transducer and the host structure based on the effective impedance. The proposed formulations can be conveniently used to extract the mechanical impedance of the host structure from the electromechanical admittance measurements of an embedded PZT patch. The proposed model is verified by experimental and numerical results from a smart concrete cube in which a square PZT transducer is embedded. Subsequently, this paper also presents a new methodology to monitor the compressive strength of concrete based on the effective mechanical impedance. By extracting the effective mechanical impedances from the electromechanical admittance signatures, measuring the compressive strength of the concrete cubes at different ages and combining these measurements with the index of the correlation coefficient (CC), a linear correlation between the concrete strength gain and the CC of the real mechanical admittances was found. The proposed approach is found to be feasible to monitor the compressive strength of concrete by age.
Embedded 3D electromechanical impedance model for strength monitoring of concrete using a PZT transducer
The electromechanical (EM) impedance approach in which piezoelectric ceramics (PZT) simultaneously act as both a sensor and an actuator due to their direct and inverse piezoelectric effects has emerged as a powerful tool for structural health monitoring in recent years. This paper formulates a new 3D electromechanical impedance model that characterizes the interaction between an embedded square PZT transducer and the host structure based on the effective impedance. The proposed formulations can be conveniently used to extract the mechanical impedance of the host structure from the electromechanical admittance measurements of an embedded PZT patch. The proposed model is verified by experimental and numerical results from a smart concrete cube in which a square PZT transducer is embedded. Subsequently, this paper also presents a new methodology to monitor the compressive strength of concrete based on the effective mechanical impedance. By extracting the effective mechanical impedances from the electromechanical admittance signatures, measuring the compressive strength of the concrete cubes at different ages and combining these measurements with the index of the correlation coefficient (CC), a linear correlation between the concrete strength gain and the CC of the real mechanical admittances was found. The proposed approach is found to be feasible to monitor the compressive strength of concrete by age.
Embedded 3D electromechanical impedance model for strength monitoring of concrete using a PZT transducer
Eingebettetes elektromechanisches 3D Impedanzmodell zur Festigkeitsüberwachung von Beton unter Verwendung eines PZT-Wandlers
Wang, Dansheng (author) / Song, Hongyuan (author) / Zhu, Hongping (author)
Smart Materials and Structures ; 23 ; 115019/1-115019/14
2014
14 Seiten, 26 Quellen
Article (Journal)
English
Druckfestigkeit , Korrelationskoeffizient , piezoelektrische Keramik , piezoelektrischer Effekt , Signatur , Transducer (Wandler) , Bleizirkonattitanat , Beton , elektromechanischer Wandler , Sensorik , Sensor-Aktor-System , Scheinwiderstandsmessung , Korrelation , piezoelektrischer Wandler , 3D-Messung , dreidimensionale Darstellung , Frequenzgang , Young-Modul
| British Library Online Contents | 2014
Monitoring of the strength gain of concrete using embedded PZT impedance transducer
| British Library Online Contents | 2011
Monitoring of the strength gain of concrete using embedded PZT impedance transducer
| Online Contents | 2011