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Multi-Physics Mesoscale Substructure Analysis on Stress Wave Measurement within CFST-PZT Coupling Models for
Jiang Wang1, Bin Xu1,2, Hongbing Chen3
1College of Civil Engineering, Huaqiao University, Xiamen 361021, China.
Sensors (Basel, Switzerland)
|February 15, 2022
Summary
Interface debonding defects in concrete-filled steel tubes (CFSTs) significantly impact piezoelectric-lead-zirconate-titanate (PZT) sensor measurements. These defects are more influential than the concrete core
Area of Science:
- Structural Health Monitoring
- Materials Science
- Non-Destructive Testing
Background:
- Concrete-filled steel tubes (CFSTs) are widely used structural components.
- Interface debonding is a critical defect affecting CFST performance.
- Piezoelectric-lead-zirconate-titanate (PZT) sensors are utilized for stress wave-based defect detection.
Purpose of the Study:
- To investigate the influence of concrete core mesoscale structure on PZT sensor response in CFSTs.
- To differentiate the impact of mesoscale heterogeneity and interface debonding on sensor measurements.
Main Methods:
- Development of multi-physics substructure models of CFST members coupled with PZT actuator and sensor.
- Inclusion of single and randomly distributed aggregates to represent concrete mesoscale heterogeneity.
- Simulation of stress wave propagation under sinusoidal and sweep frequency signals for various defect scenarios.
Main Results:
- Mesoscale heterogeneity of the concrete core influences stress wave propagation and PZT sensor response.
- Interface debonding defects cause significant changes in the amplitude and wavelet packet energy of PZT sensor signals.
- The effect of interface debonding is found to be dominant over mesoscale heterogeneity.
Conclusions:
- Multi-physics substructure models accurately represent PZT sensor measurements in CFSTs.
- Interface debonding defects are the primary factor affecting PZT sensor measurements in CFSTs.
- This study provides a foundation for reliable defect detection in CFST structures.
Keywords:
concrete-filled steel tube (CFST)embedded piezoelectric-lead-zirconate-titanate (PZT) sensorinterface debonding detectionmesoscale concretemulti-physics coupling modelssubstructureMore Related Videos
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