SHM for RC Structure Using PZT Rebar Active Sensing System - Numerical Study

Abstract : An active sensing diagnostic system using PZT for SHM of reinforced concrete structure has been currently under the investigation. The system consists of steel reinforcement bar (rebar) and PZTs bonded on the rebar surface. Test results show that the system can detect damages of the structure. To fundamentally understand the damage algorithm and therefore to establish a robust diagnostic mechanism, an accurate Finite Element Analysis (FEA) for the system has been performed. Reinforced concrete structure with a PZT bonded rebar is also simulated and analyzed with commercial FEA software. Simulation analysis is further made for concrete structure with different debonding damage sizes, and the results are validated with test ones. A series of signal optimization have been done through simulated parametric studies. Improvement of PZT installation has been discussed and the relationship between improvement and signal output has been established. By increasing both sizes of PZT actuators and sensors, the output signals increase linearly with PZT size and by several times.
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Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014
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Fan Wu, Wanjun Li, Juan Yi. SHM for RC Structure Using PZT Rebar Active Sensing System - Numerical Study. Le Cam, Vincent and Mevel, Laurent and Schoefs, Franck. EWSHM - 7th European Workshop on Structural Health Monitoring, Jul 2014, Nantes, France. 2014. 〈hal-01020430〉

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