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Computers and Concrete Volume 20, Number 5, November 2017 , pages 595-603 DOI: https://doi.org/10.12989/cac.2017.20.5.595 |
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Structural health monitoring using piezoceramic transducers as strain gauges and acoustic emission sensors simultaneously |
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Linsheng Huo, Xu Li, Dongdong Chen and Hongnan Li
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| Abstract | ||
| Piezoceramic transducers have been widely used in the health monitoring of civil structures. However, in most cases, they are used as sensors either to measure strain or receive stress waves. This paper proposes a method of using piezoelectric transducers as strain gauges and acoustic emission (AE) sensors simultaneously. The signals received by piezoceramic transducers are decomposed into different frequency components for various analysis purposes. The low-frequency signals are used to measure strain, whereas the high-frequency signals are used as acoustic emission signal associated with local damage. The b-value theory is used to process the AE signal in piezoceramic transducers. The proposed method was applied in the bending failure experiments of two reinforced concrete beams to verify its feasibility. The results showed that the extracted low-frequency signals from the piezoceramic transducers had good agreement with that from the strain gauge, and the processed high-frequency signal from piezoceramic transducers as AE could indicate the local damage to concrete. The experimental results verified the feasibly of structural health monitoring using piezoceramic transducers as strain gauges and AE sensors simultaneously, which can advance their application in civil engineering. | ||
| Key Words | ||
| piezoceramic transducer; strain gauge; acoustic emission; structural health monitoring; concrete structures | ||
| Address | ||
| Linsheng Huo and Dongdong Chen: State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China Xu Li: CITIC Construction CO., LTD, No. 2 East Third Ring Road, Beijing 100027, China Hongnan Li: 1) State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China 2) School of Civil Engineering, Shenyang Jianzhu University, No. 9, Hunnan East Road, Shenyang 110168, China | ||