Nondestructive Wireless Monitoring of Early-Age Concrete Strength Gain Using an Innovative Electromechanical Impedance Sensing System

Providakis, C. P.; Liarakos, Evangelos V.; Kampianakis, Eleftherios

doi:10.1155/2013/932568

Cited by 30 publications

(41 citation statements)

References 10 publications

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“…Further, on-line monitoring of concrete compressive strength gain using PZTs has successfully been achieved [13][14][15][16][17]. PZT admittances were also utilized in finite element method analyses that have been carried out for the evaluation of yielding or corrosion damage in steel reinforcing bars [1,18,19], to localize cracking in concrete beams [20,21] and to detect debonding damages in RC beams retrofitted with CFRP laminates [22,23].…”

Section: Introductionmentioning

confidence: 99%

Experimental application of a wireless earthquake damage monitoring system (WiAMS) using PZT transducers in reinforced concrete beams

Chalioris

Providakis

Favvata

et al. 2015

WIT Transactions on the Built Environment

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An innovative portable wireless real time structural health monitoring system that can detect the earthquake damage and the structural integrity of reinforced concrete members in seismic-prone regions is experimentally evaluated. Damage detection is achieved by the use of piezoelectric transducers (actuators/sensors) and the implementation of an integration analytical approach based on the electromechanical impedance method. In this direction, piezoelectric lead zirconate titanate (PZT) transducers are bonded on the surface of the steel reinforcing bars of two large-scale reinforced concrete beams. Tested beams subjected to typical flexural monotonic and cyclic loadings and damage monitoring was performed at different loading levels, before and after yielding, using the developed system. Comparisons of the response signals acquired from the bonded piezoelectric patches for the healthy and the damaged states showed a clear gradation of the examined damage levels and provide cogent evidence that the monitoring system is sensitive from an early stage of the performed tests. The effectiveness of this structural health Wireless impedance or Admittance Monitoring System (WiAMS) to detect concrete cracking and steel yielding due to seismic excitations is also commented on. First results showed that the use of PZTs for detecting earthquake damages in reinforced concrete structures by employing the electromechanical impedance approach can be considered as a highly promising non-destructive structural health monitoring method.

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Section: Introductionmentioning

confidence: 99%

Experimental application of a wireless earthquake damage monitoring system (WiAMS) using PZT transducers in reinforced concrete beams

Chalioris

Providakis

Favvata

et al. 2015

WIT Transactions on the Built Environment

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“…Taking into account the results presented in the companion paper , for the purposes of the present paper, we introduce the term N out ‐R as the ratio between the amount of cumulative N out value changes and the elapsed time from the baseline measurement stage (3‐h from concrete casting). N out ‐R index is described mathematically by the following form:

N_{italicout‐}_R (t_{n}) = \frac{true \sum_{j = 2}^{n} normalΔ {N_{italicout}}_{j}}{true \sum_{j = 2}^{n} normalΔ t_{j}} = \frac{true \sum_{j = 2}^{n} ((), {N_{italicout}}_{j} - {N_{italicout}}_{j - 1})}{true \sum_{j = 2}^{n} ((), t_{j} - t_{j - 1})}

where t n is the n th sampling time from concrete casting and t 1 = 3 h. Table presents the values of N out ‐R index as computed by using equation for C3 specimen.…”

Section: Laboratory Tests and Resultsmentioning

confidence: 99%

“…Cumulative value of concrete compressive strength changes according to Eurocode (EC2) formula. (a) From 3 h to 28 days (672 h) and (b) focus to time range between 3 h and 3 days (72 h) .…”

Section: Laboratory Tests and Resultsmentioning

confidence: 99%

“…Taking into account the results presented in the companion paper [5], for the purposes of the present paper, we introduce the term N out -R as the ratio between the amount of cumulative N out value changes and the elapsed time from the baseline measurement stage (3-h from concrete casting). N out -R index is described mathematically by the following form:…”

Section: Generalized Extreme Value-based Concrete Strength Developmenmentioning

confidence: 99%

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Web-based concrete strengthening monitoring using an innovative electromechanical impedance telemetric system and extreme values statistics

Providakis

Liarakos

2014

Struct. Control Health Monit.

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SUMMARY Any possible and reliable monitoring of early age concrete strengthening can be considered as an essential aspect for operations such as removal of frameworks, prestress, or cracking control. This paper presents the development of a portable and innovative telemetric electromechanical impedance monitoring system, to experimentally monitor concrete strength development procedure from the initial states of casting and hydration to the final stages of hardening 28 days after casting. The proposed system functionality is based on piezoelectric (lead zirconate titanate) sensor/actuator technology and exploits the interaction between voltage‐stimulated piezoelectric material and host concrete structure in a coupled lead zirconate titanate concrete electromechanical system. It is found that the proposed electromechanical impedance technique associated with decision boundaries based on extreme value statistics is very sensitive to the strength gain of concrete structures from their earliest stages. Copyright © 2014 John Wiley & Sons, Ltd.

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“…The applications of the impedance method have recently extended to assessing dental implant stability (Tabrizi et al, 2012), aircraft applications (Martins et al, 2012), wind turbine blades (Huh et al, 2014), corrosion monitoring (Talakokula et al, 2014;Yang et al, 2013), and concrete curing monitoring (Providakis et al, 2013;Yang et al, 2010). This technique is promising for assessing structural damage in real time, utilizing high-frequency excitations to examine changes in a structure's electrical impedance signature.…”

Section: Introductionmentioning

confidence: 99%

Relative baseline features for impedance-based structural health monitoring

Jung

Park

et al. 2014

Journal of Intelligent Material Systems and Structures

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Various experimental studies have demonstrated that an impedance-based method is an effective means of structural damage detection. Using the self-sensing and active-sensing capabilities of piezoelectric materials, the electromechanical impedance response can be monitored to provide a qualitative indication of the overall health of a structure. In this article, two new signal processing tools for the impedance method are described in order to improve the damage detection capability and to reduce the amount of data to process for structural health assessment. The first approach is to instantaneously correlate the impedance data between different sensor sets, as opposed to be correlated to pre-stored baseline data. Another approach is to use the pre-defined parameter of impedance data to establish a generalized baseline for bolted joint monitoring. These approaches could reduce the number of data sets and could be efficiently used for low-power impedance devices. The proposed signal processing techniques are applied to several experimental structures, and the efficiency in damage detection is demonstrated.

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Nondestructive Wireless Monitoring of Early-Age Concrete Strength Gain Using an Innovative Electromechanical Impedance Sensing System

Cited by 30 publications

References 10 publications

Experimental application of a wireless earthquake damage monitoring system (WiAMS) using PZT transducers in reinforced concrete beams

Experimental application of a wireless earthquake damage monitoring system (WiAMS) using PZT transducers in reinforced concrete beams

Web-based concrete strengthening monitoring using an innovative electromechanical impedance telemetric system and extreme values statistics

Relative baseline features for impedance-based structural health monitoring

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