Compactness Monitoring of Compound Concrete Filled with Demolished Concrete Lumps Using PZT-Based Smart Aggregates

Hou, Shuang; Kong, Zhihao; Wu, Bo; Liu, Lu

doi:10.1061/(asce)as.1943-5525.0000903

Cited by 15 publications

(11 citation statements)

References 29 publications

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“…Since this cross talk comes in the form of electric currents, its amplitude is much higher than the electric current generated by the piezoelectric effect. Some published studies have reported serious cross talk in the signals acquired by the TPA [27].…”

Section: Improved Piezoelectric Aggregatementioning

confidence: 99%

“…The results indicate that the occurrence of the interlayer slide attenuates the wave energy and decreases the signal intensity. Hou et al [27] utilized the piezoelectric aggregates to monitor the compactness of the compound concrete filled with the demolished concrete lumps. Zhang et al [28] predicted the seismic stress by analyzing the average output voltages of a limited number of embedded piezoelectric aggregates in the high-strength concrete.…”

Section: Introductionmentioning

confidence: 99%

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Damage Quantification with Embedded Piezoelectric Aggregates Based on Wavelet Packet Energy Analysis

Wang

Cao

2019

Sensors

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Cement-based components have been widely used in civil engineering structures. However, due to wearing and deterioration, the cement-based components may have brittle failure. To provide early warning and to support predictive reinforcement, the piezoelectric materials are embedded into the cement-based components to excite and receive elastic waves. By recognizing the abnormalities in the elastic waves, hidden damage can be identified in advance. However, few research has been published regarding the damage quantification. In this paper, the wavelet packet analysis is adopted to calculate the energy of the transmitted elastic waves based on the improved piezoelectric aggregates (IPAs). Due to the growth of the damage, less elastic waves can pass through the damage zone, decreasing the energy of the acquired signals. A set of cement beams with different crack depths at the mid-span is tested in both numerical and experimental ways. A damage quantification index, namely the wavelet packet-based energy index (WPEI), is developed. Both the numerical and experimental results demonstrate that the WPEI decreases with respect to the crack depth. Based on the regression analysis, a strong linear relationship has been observed between the WPEI and the crack depth. By referring to the linear relationship, the crack depth can be estimated by the WPEI with a good accuracy. The results demonstrated that the use of the IPAs and the WPEI can fulfill the real-time quantification of the crack depth in the cement beams.

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Section: Improved Piezoelectric Aggregatementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Damage Quantification with Embedded Piezoelectric Aggregates Based on Wavelet Packet Energy Analysis

Wang

Cao

2019

Sensors

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“…However, the propagation of stress waves in concrete is complex, which is attributed to the inherent multiphase and non-homogeneous properties of concrete materials (Hou et al, 2018, 2019). To effectively evaluate the damage state of concrete structures by using piezoelectric transducers, it is necessary to study the attenuation law of stress waves in concrete.…”

Section: Introductionmentioning

confidence: 99%

Attenuation characteristics of stress wave in cracked concrete beam using smart aggregate transducers enabled time-reversal technique

Zhou

Zheng

et al. 2020

Journal of Intelligent Material Systems and Structures

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Piezoelectric enabled stress wave methods for concrete structural health monitoring have been widely researched. However, the attenuation characteristics of stress wave in cracked concrete structures have barely been studied. As a result, it is hard to quantify the damage levels of the concrete structure. In this paper, the attenuation characteristics of stress wave in cracked concrete beam are studied using stress wave with the time-reversal technique. The attenuation model of stress waves related to the focused signal amplitude and the total crack width of concrete beam is proposed. In this study, a series of 18 concrete beams were tested using a four-point loading. During the test procedure, the signals of stress wave from the piezoelectric smart aggregate transducers in all the test specimens were collected to facilitate the proposed model. The test data of 12 beams are used to determine the attenuation coefficient of stress wave per unit crack width, and the test data of the other six beams are used to validate the accuracy of the proposed attenuation model. The results indicate that the prediction results based on the stress wave attenuation model are in good agreement with the test results of cracked concrete beams.

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“…By taking advantage of these features, PZT transducers have been studied for a promising application to civil engineering structures by many researchers, such as Song et al [44], Yang et al [45], Park et al [46], Wang et al [47], Feng et al [48,49]. In these applications, the PZT transducers were embedded in [50,51,52,53] or bonded on [54,55,56,57] the host structure, and the health condition of the structures can be achieved by analyzing the stress wave propagation and attenuation when compared to the signatures under the undamaged condition [58,59,60]. Unfortunately, few literatures have reported the PZT-based health monitoring of strengthened concrete structures during its service period, to the authors’ best knowledge.…”

Section: Introductionmentioning

confidence: 99%

Self-Sensing CFRP Fabric for Structural Strengthening and Damage Detection of Reinforced Concrete Structures

Feng

2018

Sensors

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This paper presents a concept of a Self-sensing Carbon Fiber Reinforced Polymer (SCFRP) system, which integrates the piezoceramic transducers with the common concrete strengthening materials, CFRP fabric. This integration provides the SCFRP fabric with the ability to monitor the structural health condition when the SCFRP fabric is applied on reinforced concrete structures. In order to validate the feasibility of this system, several three-point bending beam (3PBB) specimens were fabricated and tested before and after the specimens were reinforced with the proposed SCFRP fabric. In addition, the specimens with the low (C25) and high (C40) concrete grades were also experimentally investigated to evaluate the reinforced effectiveness of the SCFRP fabric. Finally, the experimental results demonstrate that the proposed SCFRP fabric can significantly improve the bearing capacity of the concrete structures, and provided the reinforced concrete structures with an ability of self-sensing their health condition.

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Compactness Monitoring of Compound Concrete Filled with Demolished Concrete Lumps Using PZT-Based Smart Aggregates

Cited by 15 publications

References 29 publications

Damage Quantification with Embedded Piezoelectric Aggregates Based on Wavelet Packet Energy Analysis

Damage Quantification with Embedded Piezoelectric Aggregates Based on Wavelet Packet Energy Analysis

Attenuation characteristics of stress wave in cracked concrete beam using smart aggregate transducers enabled time-reversal technique

Self-Sensing CFRP Fabric for Structural Strengthening and Damage Detection of Reinforced Concrete Structures

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