Fatigue damage and residual fatigue life assessment in reinforced concrete frames using PZT-impedance transducers

Haq, Moinul; Bhalla, Suresh; Naqvi, Tabassum

doi:10.1016/j.cemconcomp.2020.103771

Cited by 30 publications

(9 citation statements)

References 27 publications

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“…For the investigation of severity of damage, the RMSD index method was used. Haq et al [105] investigated fatigue damage and residual fatigue life of RC frames structure using PZT transducers. The RMSD index method was used for the damage assessment of a considered structure.…”

Section: Recent Literatures On Quantification Of Damagementioning

confidence: 99%

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Review Article on Condition Assessment of Structures Using Electro-Mechanical Impedance Technique

Maurya¹,

Rawat²,

Shanker³

2022

Structural Durability &Amp; Health Monitoring

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Structural health monitoring (SHM) is a process for determination of presence, location, severity of damages and remaining life of the infrastructures. SHM is widely applied in aerospace, mechanical and civil engineering systems to assess the conditions of structures to improve the operation, safety, serviceability and reliability, respectively. There are various SHM techniques for monitoring the health of structures such as global response based and local techniques. Damages occur in the structures due to its inability to withstand intended design loadings, physical environment and chemical environment. Therefore, damage identification is necessary to improve the durability of the structures for protection against catastrophic failure. The research paper is focused on electro-mechanical impedance (EMI) technique which is one of the techniques based on smart materials. The smart materials are utilized for monitoring the health of the structures. These are used for damage determination and its quantification for the interrogated structures. Variation in admittance or impedance signature shows the existence of damage in the structures. Furthermore, the different statistical methods viz., root mean square deviation (RMSD), mean absolute percentage deviation (MAPD), covariance (Cov), and correlation coefficient (CC) are used for the quantification of damage. Smart material such as piezoelectric materials, its properties and applications are also considered. In this paper, the implementation of EMI technique based on different recent advances in smart materials and their appropriateness have been described. Subsequently, the reviewed investigations are significant for the monitoring of real-life infrastructures. The presented paper is the compact state-of-the-art for EMI technique which is used for SHM. This examination will be valuable to infrastructural health monitoring and engineering applications in respect to innovative research directions.

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Section: Recent Literatures On Quantification Of Damagementioning

confidence: 99%

“…and CC used for damage quantification of RC beam structure[89] investigated fatigue damage and the residual fatigue life[105] Zhang et al (2020) RMSD, MAPD and CC examined stiffness degradation[106] …”

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confidence: 99%

Review Article on Condition Assessment of Structures Using Electro-Mechanical Impedance Technique

Maurya¹,

Rawat²,

Shanker³

2022

Structural Durability &Amp; Health Monitoring

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“…The advent of the internet of things has lead to tremendous surge in smart infrastructure applications within structural health monitoring. Lead zirconate Titanate (PZT) transducers find a variety of applications in structural health monitoring such as assessing performance and state of pre-stressed concrete [9], [10], damage localization and monitoring [11]- [14], monitoring debonding in composite structures [15]- [17], monitoring of fatigue damage and curing of adhesives [18], [19] etc. More recently, PZT transducers embedded within infrastructure are employed as smart sensors for real-time monitoring [20], [21] for applications such as impact monitoring [22] and detection of internal damage in concrete and embedded reinforcements [23], [24].…”

Section: Introductionmentioning

confidence: 99%

Smart Cathodic Protection System for Real-Time Quantitative Assessment of Corrosion of Sacrificial Anode Based on Electro-Mechanical Impedance (EMI)

et al. 2021

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Corrosion of metal structures is often prevented using cathodic protection systems, that employ sacrificial anodes that corrode more preferentially relative to the metal to be protected. In-situ monitoring of these sacrificial anodes during early stages of their useful life could offer several insights into deterioration of the material surrounding the infrastructure as well as serve as early warning indicator for preventive maintenance of critical infrastructure. In this article, we present an Electro-Mechanical Impedance (EMI) measurement-based technique to quantify extent of corrosion of a zinc sacrificial anode without manual intervention. The detection apparatus consists of a lead zirconate titanate (PZT) transducer affixed onto a circular zinc disc, with waterproofing epoxy protecting the transducer element when the assembly is submerged in liquid electrolyte (salt solution) for accelerated corrosion by means of impressed current. We develop an analytical model for discerning the extent of corrosion by monitoring shift in resonance frequency for in-plane radial expansion mode of the disc. The model presented here accurately captures the nonlinearity introduced by partial delamination of the corrosion product (zinc oxide) from the disc, and shows excellent agreement with experimental results. Our work establishes the efficacy of the proposed technique for monitoring the state of health of sacrificial anodes in their early stage of deterioration and could thus be widely adopted for structural health monitoring applications within the internet of things. INDEX TERMS Cathodic protection system, corrosion monitoring, electro-mechanical impedance (EMI), sacrificial anode, smart infrastructure, structural health monitoring.

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“…The structures undergo cyclic loading to assess the damage at different cycles. The residual fatigue life of the structures is estimated by the equivalent stiffness parameters obtained from signatures [28,29].…”

Section: Introductionmentioning

confidence: 99%

New refined analytical models for various bonding conditions of an adhesively bonded smart PZT transducer using the EMI technique

Parpe¹,

Saravanan²

2021

Smart Mater. Struct.

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The electro-mechanical impedance (EMI) technique has emerged as a cost-effective and non-destructive technique to detect the possible damages in the structure using a piezoelectric transducer, especially, lead zirconate titanate (PZT). The adhesive bond layer plays an important role in the PZT patch-host structure interaction for monitoring structural damage. Two bonding conditions are investigated in this research paper. Primarily, the debonding phenomenon of the adhesive bond layer may misinterpret the EMI response on the damage caused in structure. Subsequently, the investigation included the protective layer at the top of the PZT transducer to avoid sensor degradation. However, the analytical models developed so far have not considered a protective layer at the top of the PZT transducer. This paper presents the novel two-dimensional (2D) analytical model for incorporating debonding concepts and the new refined 2D analytical model to include a protective layer in the study of surface-bonded PZT transducers. The proposed analytical models are verified with the experimental studies. The experimental and analytical results show good agreement, which confirms the effectiveness of the new models. This paper also incorporated the effect of each bonding condition for monitoring structural damage by implementing the EMI technique. For the simulation, the numerical investigations on the PZT transducer bonded on the metallic (aluminum and steel) and concrete blocks are performed using coupled field analysis through finite element (FE) modeling. It is found that each bonding condition has influenced the resulting signatures. The signatures obtained from developed theoretical models and numerical simulations using three-dimensional FE models for each bonding condition are compared to highlight the influence on structural damage detection. The trend of signatures is found to be matching satisfactory. Several parametric studies have been conducted to show the efficacy of the new refined model with a protective layer. It considers the different input properties of an adhesive layer, host structure, and temperature conditions. The influence of debonding of the protective layer is also studied, and the obtained results support the need for a protective layer in the models.

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Fatigue damage and residual fatigue life assessment in reinforced concrete frames using PZT-impedance transducers

Cited by 30 publications

References 27 publications

Review Article on Condition Assessment of Structures Using Electro-Mechanical Impedance Technique

Review Article on Condition Assessment of Structures Using Electro-Mechanical Impedance Technique

Smart Cathodic Protection System for Real-Time Quantitative Assessment of Corrosion of Sacrificial Anode Based on Electro-Mechanical Impedance (EMI)

New refined analytical models for various bonding conditions of an adhesively bonded smart PZT transducer using the EMI technique

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