Location
University of jinan
Event Website
None
Keywords
Piezoelectric; Sensor; Concrete; Static loading; Damage detection
Abstract
In this paper, an ultrasonic sensor for concrete damage detection was designed and prepared. The ultrasonic sensor was used to detect concrete under static load. The results show that the piezoelectric sensor has high sensitivity when the resonant frequency of piezoelectric ceramic is 112kHz and the thickness of alumina matching layer is 1.5mm. As the concrete load increases gradually, the waveform moves backward, and the time for the sensor to receive the waveform becomes longer and the propagation speed becomes slower. When the load force on the concrete test block is small, peak-to-peak value and first wave amplitude decrease rapidly, while the loading force increases, and the decreasing amplitude gradually decreases. The peak-to-peak value decreases from 8.432V before loading to 1.289V when the loading force is 110kN, and the first wave amplitude decreases from 0.045V to 0.01V, proving that at this time, large damage has occurred in the concrete.
Damage detection of concrete under static loading based on ultrasonic sensor
University of jinan
In this paper, an ultrasonic sensor for concrete damage detection was designed and prepared. The ultrasonic sensor was used to detect concrete under static load. The results show that the piezoelectric sensor has high sensitivity when the resonant frequency of piezoelectric ceramic is 112kHz and the thickness of alumina matching layer is 1.5mm. As the concrete load increases gradually, the waveform moves backward, and the time for the sensor to receive the waveform becomes longer and the propagation speed becomes slower. When the load force on the concrete test block is small, peak-to-peak value and first wave amplitude decrease rapidly, while the loading force increases, and the decreasing amplitude gradually decreases. The peak-to-peak value decreases from 8.432V before loading to 1.289V when the loading force is 110kN, and the first wave amplitude decreases from 0.045V to 0.01V, proving that at this time, large damage has occurred in the concrete.
https://docs.lib.purdue.edu/icdcs/2022/partiii/9
