Experiments and finite element analysis for detecting the embedded defects in concrete using PZT transducers
| Autor: | Chun Chen, Yamei Zhang, Shunquan Zhang, Yuanliang Xiong |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
business.industry Attenuation 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Structural engineering Durability Piezoelectricity Signal Finite element method 0201 civil engineering Transducer Amplitude 021105 building & construction General Materials Science Ultrasonic sensor business Civil and Structural Engineering |
| Zdroj: | Construction and Building Materials. 292:123318 |
| ISSN: | 0950-0618 |
| DOI: | 10.1016/j.conbuildmat.2021.123318 |
| Popis: | Deficiencies inside concrete may reduce the load-bearing capacity and bring potential safety and durability problems to infrastructures. Detection of concrete deficiencies at the earliest time poses a great importance on structure safety. While there is still a lack of accurate and efficient method for quantitative evaluation of defects in concrete structures. In this study, the damage index was introduced to quantitatively evaluate the defects in concrete using piezoelectric (PZT) transducers. Meanwhile, the simulations of transducer excitation, the wave propagation in concrete, and the transducer receiving were established by Abaqus software. The results indicate that the localization and quantitative evaluation of defects in concrete could be achieved by using the damage index. The relative deviation of wave velocity and amplitude between the numerical and experimental results was within 15% and 20% respectively. The change of damage index obtained from experiments could be reasonably explained by the changing of normal stress distribution of finite element analysis. Numerical modeling could also help to understand and analyze the ultrasonic signal attenuation of the experimental results by using the normal stress distribution along propagation path. |
| Databáze: | OpenAIRE |
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