An Innovative Active Sensing Platform for Wireless Damage Monitoring of Concrete Structures

Providakis, C. P.; Tsistrakis, Stavros; Voutetaki, Maristella E.; Tsompanakis, J.; Stavroulaki, Maria; Agadakos, John; Kampianakis, Eleftherios; Pentes, George; Liarakos, Evangelos V.

doi:10.2174/2405465801666160830155120

Cited by 11 publications

(7 citation statements)

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“…During the imposed cyclic loading sequence of the tested BCJ specimens, damage due to concrete cracking, yielding of steel reinforcement and failures of the epoxy-bonded C-FRP ropes occurred. The severity levels of the damage were identified using the frequency responses of the mounted PZT transducers and measured by the used SHM device [ 54 , 55 , 56 , 57 , 58 ].…”

Section: Pzt Transducersmentioning

confidence: 99%

“…The PZT-based SHM system used in this study is called the “Wireless impedance/Admittance Monitoring System (WiAMS)”, developed by Providakis et al [ 55 ] and verified by various test projects in small- and full-scaled RC specimens, by the authors [ 56 , 57 , 58 ]. Two cables connected each WiAMS device to the poles of each PZT patch mounted to the RC BCJ specimens JC0 and JB0F, as shown in Figure 5 b and Figure 6 b, respectively.…”

Section: Pzt Transducersmentioning

confidence: 99%

“…Data recorded by the PZTs are presented in voltage versus frequency diagrams. More details about the modules and the operation of the WiAMS device can be found in [ 54 , 55 , 56 , 57 , 58 ].…”

Section: Pzt Transducersmentioning

confidence: 99%

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Efficacy and Damage Diagnosis of Reinforced Concrete Columns and Joints Strengthened with FRP Ropes Using Piezoelectric Transducers

Karayannis

Golias

Naoum

et al. 2022

Sensors

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Recent research has indicated that the implantation of a network of piezoelectric transducer patches in element regions of potential damage development, such as the beam–column joint (BCJ) area, substantially increases the efficacy and accuracy of the structural health monitoring (SHM) methods to identify damage level, providing a reliable diagnosis. The use of piezoelectric lead zirconate titanate (PZT) transducers for the examination of the efficiency of an innovative strengthening technique of reinforced concrete (RC) columns and BCJs is presented and commented on. Two real-scale RC BCJ subassemblages were constructed for this investigation. The columns and the joint panel of the second subassemblage were externally strengthened with carbon fiber-reinforced polymer (C-FRP) ropes. To examine the efficiency of this strengthening technique we used the following transducers: (a) PZT sensors on the ropes and the concrete; (b) tSring linear variable displacement transducers (SLVDTs), diagonally installed on the BCJ, to measure the shear deformations of the BCJ panel; (c) Strain gauges on the internal steel bars. From the experimental results, it became apparent that the PZT transducers successfully diagnosed the loading step at which the primary damage occurred in the first BCJ subassemblage and the damage state of the strengthened BCJ during the loading procedure. Further, data acquired from the diagonal SLVDTs and the strain gauges provided insight into the damage state of the two tested specimens at each step of the loading procedure and confirmed the diagnosis provided by the PZT transducers. Furthermore, data acquired by the PZT transducers, SLVDTs and strain gauges proved the effectiveness of the applied strengthening technique with C-FRP ropes externally mounted on the column and the conjunction area of the examined BCJ subassemblages.

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Section: Pzt Transducersmentioning

confidence: 99%

Section: Pzt Transducersmentioning

confidence: 99%

See 1 more Smart Citation

Efficacy and Damage Diagnosis of Reinforced Concrete Columns and Joints Strengthened with FRP Ropes Using Piezoelectric Transducers

Karayannis

Golias

Naoum

et al. 2022

Sensors

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show abstract

“…Since the PZT material has both direct and reverse piezoelectric effects, it can serve as both an actuator and a sensor. Nowadays, there are mainly two types of methods for SHM using PZT-based transducers, namely, the active sensing method [ 46 , 47 , 48 ] and the electromechanical impedance method [ 49 , 50 , 51 , 52 ]. Based on these two methods, PZT transducers have been employed in numerous studies.…”

Section: Introductionmentioning

confidence: 99%

A PZT-Based Electromechanical Impedance Method for Monitoring the Soil Freeze–Thaw Process

Zhang

Xiao

et al. 2019

Sensors

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It is important to conduct research on the soil freeze–thaw process because concurrent adverse effects always occur during this process and can cause serious damage to engineering structures. In this paper, the variation of the impedance signature and the stress wave signal at different temperatures was monitored by using Lead Zirconate Titanate (PZT) transducers through the electromechanical impedance (EMI) method and the active sensing method. Three piezoceramic-based smart aggregates were used in this research. Among them, two smart aggregates were used for the active sensing method, through which one works as an actuator to emit the stress wave signal and the other one works as a sensor to receive the signal. In addition, another smart aggregate was employed for the EMI testing, in which it serves as both an actuator and a receiver to monitor the impedance signature. The trend of the impedance signature with variation of the temperature during the soil freeze–thaw process was obtained. Moreover, the relationship between the energy index of the stress wave signal and the soil temperature was established based on wavelet packet energy analysis. The results demonstrate that the piezoceramic-based electromechanical impedance method is reliable for monitoring the soil freezing and thawing process.

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“…Therefore, in addition to experienced inspectors and the pre-knowledge of damage locations, SHM is a laborious, labor-intensive task which involves health and safety risks, especially when it is performed manually [7]. Due to this, several SHM approaches have taken further steps towards automated/real-time sensing systems in a bid to reduce human intervention as well as to increase the safety and frequency of data collection [8,9].…”

Section: Introductionmentioning

confidence: 99%

Sensing of Damage and Repair of Cement Mortar Using Electromechanical Impedance

2019

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Lead zirconium titanate (PZT) has recently emerged as a low-cost material for non-destructive monitoring for civil structures. Despite the numerous studies employing PZT transducers for structural health monitoring, no studies have assessed the effects of both damage and repair on the electromechanical impedance response in cementitious materials. To this end, this study was conducted to assess the effects of the damage and repair of mortar samples on the electromechanical response of a surface-mounted PZT transducer. When damage was introduced to the specimen in stages, the resonance frequencies of the admittance signature were shifted to lower frequencies as the damage increased, and an increase in the peak amplitude was detected, indicating an increase in the damping and a reduction in the material stiffness properties. Also, increasing the damage in the material has been shown to decrease the sensitivity of the PZT to further damage. During the repair process, a noticeable difference between the after-damage and the after-repair admittance signatures was noted. The root-mean-square deviation (RMSD) showed a decreasing trend during the repair process, when compared to the before repair RMSD response which indicated a partial recovery for the material properties by decreasing the damping property in the material.

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An Innovative Active Sensing Platform for Wireless Damage Monitoring of Concrete Structures

Cited by 11 publications

References 0 publications

Efficacy and Damage Diagnosis of Reinforced Concrete Columns and Joints Strengthened with FRP Ropes Using Piezoelectric Transducers

Efficacy and Damage Diagnosis of Reinforced Concrete Columns and Joints Strengthened with FRP Ropes Using Piezoelectric Transducers

A PZT-Based Electromechanical Impedance Method for Monitoring the Soil Freeze–Thaw Process

Sensing of Damage and Repair of Cement Mortar Using Electromechanical Impedance

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