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Non-Destructive Diagnostics of Concrete Beams Strengthened with Steel Plates Using Modal Analysis and Wavelet
Magdalena Knak1, Erwin Wojtczak1, Magdalena Rucka1,2
1Department of Mechanics of Materials and Structures, Faculty of Civil and Environmental Engineering, Gdańsk University of Technology, Narutowicza 11/12, 80-233 Gdańsk, Poland.
Materials (Basel, Switzerland)
|July 2, 2021
Summary
This study introduces a non-destructive method using modal analysis and continuous wavelet transform (CWT) to detect debonding defects in concrete structures reinforced with steel plates. The technique accurately images the exact shape and position of adhesive joint damage.
Area of Science:
- Civil Engineering
- Structural Health Monitoring
- Non-Destructive Testing
Background:
- Externally bonded reinforcements are crucial in civil engineering for enhancing concrete structures.
- Ensuring the quality of adhesive bonds is vital for the effectiveness of reinforcement.
- Non-destructive diagnostic methods are needed to assess the integrity of these adhesive joints.
Purpose of the Study:
- To detect debonding defects in adhesive joints between concrete beams and steel plates.
- To utilize modal analysis for identifying structural damage.
- To precisely localize and image debonding using continuous wavelet transform (CWT).
Main Methods:
- Modal analysis of concrete beams bonded with steel plates.
- Processing of modal shapes using continuous wavelet transform (CWT).
- Investigating the influence of wavelet parameters and mode shape interpolation on damage imaging.
Main Results:
- Successful application of integrated modal analysis and CWT for debonding detection.
- Precise localization and imaging of debonding defects in adhesive joints.
- Demonstrated effectiveness in determining the exact shape and position of damage.
Conclusions:
- Modal analysis combined with CWT is a viable non-destructive technique for assessing adhesive joints.
- The method provides accurate defect characterization in reinforced concrete structures.
- This approach enhances structural health monitoring capabilities for bonded reinforcements.
Keywords:
adhesive jointconcrete beamcontinuous wavelet transformdamage detectiondebondingmodal analysisnon-destructive testingstrengtheningvibrationsMore Related Videos
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