Journal Article10.1177/1475921706057978
Debond Detection using Embedded Piezoelectric Elements in Reinforced Concrete Structures - Part I: Experiment
Fan Wu,Fu-Kuo Chang +1 more
120
TL;DR: In this article, the authors used built-in piezoelectric discs as sensors and actuators in a pitch-catch mode to generate sensor data, which are sensitive to debond in reinforced concrete.
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Abstract: An investigation is performed to detect debond in reinforced concrete structures. This study utilizes built-in piezoelectric discs as sensors and actuators in a pitch-catch mode to generate sensor data, which are sensitive to debond in reinforced concrete. A comparison of sensor measurements or signal changes before and after maintenance or inspection can be correlated to debonding. Both experimental and analytical works are performed during the study. Experimental study and test data are presented in this article. The test results clearly indicate that debond between concrete and rebar and yielding in rebar can be detected with built-in piezoelectric sensors and actuators in a pitch-catch mode.
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Citations
Active interface debonding detection of a concrete-filled steel tube with piezoelectric technologies using wavelet packet analysis
TL;DR: In this article, an active interface condition monitoring approach for concrete-filled steel tube (CFST) by the use of lead zirconate titanate (PZT) piezoceramics based functional smart aggregates (SAs) embedded in concrete as actuator and PZT patches bonded on the surface of the steel tube as sensors is proposed and verified experimentally.
216
Longitudinal Guided Waves for Monitoring Chloride Corrosion in Reinforcing Bars in Concrete
Shruti Sharma,Abhijit Mukherjee +1 more
TL;DR: In this article, longitudinal guided ultrasonic waves have been utilized to monitor notch and debond defects in steel bars in concrete simulating pitting and delamination phenomena caused by corrosion.
111
Active Debonding Detection for Large Rectangular CFSTs Based on Wavelet Packet Energy Spectrum with Piezoceramics
Bin Xu,Bing Li,Gangbing Song +2 more
TL;DR: In this article, a debonding detection technique for CFSTs is proposed by embedding piezoelectric lead zirconate titanate (PZT) based functional smart aggregates (SAs) in concrete core as actuators and pasting PZT patches on the predetermined locations of the outer surfaces of the specimen as sensors.
106
Detection of Debonding Between Fiber Reinforced Polymer Bar and Concrete Structure Using Piezoceramic Transducers and Wavelet Packet Analysis
TL;DR: In this article, a stress wave-based active sensing approach was proposed to monitor debonding process of fiber reinforced polymer (FRP) bar with the hosting concrete structure, where two smart aggregates (SAs) were fabricated by sandwiching a shear type PZT patch between two protection marble pieces to detect the wave response.
106
Reference-free damage detection using instantaneous baseline measurements
TL;DR: A novel method of guided wave-based structural health monitoring is developed in which no direct baseline data are required to identify structural damage and this new method accomplishes reference-free damage detection by acquiring what is referred to as an instantaneous baseline measurement for analysis.
99
References
Identification of Impact Force and Location Using Distributed Sensors
Keeyoung Choi,Fu-Kuo Chang +1 more
TL;DR: In this paper, an impact load identification method using distributed built-in sensors for detecting foreign object impact is proposed, where the identification system consists of a system model and a response comparator.
151
Determining the depth of surface-opening cracks using impact-generated stress waves and time-of-flight techniques
TL;DR: In this paper, the authors developed a technique and instrumentation for determining the wave speed in concrete using impact-generated stress waves, which is independent of the geometry of the structure and uses time-of-flight measurements to determine the depth of vertical, inclined, curved, and air-filled surface-opening cracks in concrete.
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