Concrete Crack Monitoring Using a Novel Strain Transfer Model for Distributed Fiber Optics Sensors

Bassil, Antoine; Chapeleau, Xavier; Leduc, Dominique; Abraham, Odile

doi:10.3390/s20082220

Cited by 72 publications

(75 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Results are displayed in Figure 18 , considering different stiffness values ( E a ) of the polymer adhesive used to bond the DOFS. A linear evolution is observed (for a given adhesive stiffness) in accordance with the analytical approach of Bassil et al [ 42 , 43 ].…”

Section: Generalized Strain Transfer Fem Including the Effect Of Csupporting

confidence: 82%

“…This latter considers that a discontinuity of the host material (gap or crack) produces a Gaussian strain distribution at the contact interface with the primary coating of the OF. In the same vein, Bassil et al [ 42 , 43 ] used a similar expression to calculate the shear lag parameter ( k ) of a DOFS cable:

where ε(x) is the strain along the DOFS and COD is the crack opening displacement.…”

Section: Generalized Strain Transfer Fem Including the Effect Of Cmentioning

confidence: 99%

See 1 more Smart Citation

Experimental and Numerical Investigation on the Strain Response of Distributed Optical Fiber Sensors Bonded to Concrete: Influence of the Adhesive Stiffness on Crack Monitoring Performance

Alj

Quiertant

Khadour

et al. 2020

Sensors

View full text Add to dashboard Cite

The present study investigated the strain response of a distributed optical fiber sensor (DOFS) sealed in a groove at the surface of a concrete structure using a polymer adhesive and aimed to identify optimal conditions for crack monitoring. A finite element model (FEM) was first proposed to describe the strain transfer process between the host structure and the DOFS core, highlighting the influence of the adhesive stiffness. In a second part, mechanical tests were conducted on concrete specimens instrumented with DOFS bonded/sealed using several adhesives exhibiting a broad stiffness range. Distributed strain profiles were then collected with an interrogation unit based on Rayleigh backscattering. These experiments showed that strain measurements provided by DOFS were consistent with those from conventional sensors and confirmed that bonding DOFS to the concrete structure using soft adhesives allowed to mitigate the amplitude of local strain peaks induced by crack openings, which may prevent the sensor from early breakage. Finally, the FEM was generalized to describe the strain response of bonded DOFS in the presence of crack and an analytical expression relating DOFS peak strain to the crack opening was proposed, which is valid in the domain of elastic behavior of materials and interfaces.

show abstract

Section: Generalized Strain Transfer Fem Including the Effect Of Csupporting

confidence: 82%

where ε(x) is the strain along the DOFS and COD is the crack opening displacement.…”

Section: Generalized Strain Transfer Fem Including the Effect Of Cmentioning

confidence: 99%

Experimental and Numerical Investigation on the Strain Response of Distributed Optical Fiber Sensors Bonded to Concrete: Influence of the Adhesive Stiffness on Crack Monitoring Performance

Alj

Quiertant

Khadour

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…The importance of this issue has only lately been recognized as all the produced publications date back to last decade [ 12 , 13 , 14 , 15 ]. Worthy of mention, are two extensive studies analyzing the influence of different bonding adhesives on the strain output of polyamide cladded DOFS attached to bare rebars [ 11 ] and concrete surfaces [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Distributed Optical Fiber Sensing Bonding Techniques Performance for Embedment inside Reinforced Concrete Structures

Bado

Casas

Dey

et al. 2020

Sensors

View full text Add to dashboard Cite

Distributed optical fiber sensors (DOFS) are modern-day cutting-edge monitoring tools that are quickly acquiring relevance in structural health monitoring engineering. Their most ambitious use is embedded inside plain or reinforced concrete (RC) structures with the scope of comprehending their inner-workings and the functioning of the concrete-reinforcement interaction. Yet, multiple studies have shown that the bonding technique with which the DOFS are bonded to the reinforcement bars has a significant role on the quality of the extracted strain data. Whilst this influence has been studied for externally bonded DOFS, it has not been done for embedded ones. The present article is set on performing such study by monitoring the strain measurement quality as sampled by DOFS bonded to multiple rebars with different techniques and adhesives. These instrumented rebars are used to produce differently sized RC ties later tested in tension. The discussion of the test outputs highlights the quasi-optimal performance of a DOFS/rebar bonding technique consisting of incising a groove in the rebar, positioning the DOFS inside it, bonding it with cyanoacrylate and later adding a protective layer of silicone. The resulting data is mostly noise-free and anomalies-free, yet still presents a newly diagnosed hitch that needs addressing in future research.

show abstract

“…Therefore, several research groups are investigating the development of nondestructive in situ monitoring techniques to measure Cl − ingress in RC structures, which can afford fast measurements with high reliability and real-time ingress profiles without destroying the structures (Abbas et al, 2013 ). Some existing nondestructive in situ monitoring methods include electrical resistivity measurement (Corva et al, 2020 ), fiber optic sensing (Bassil et al, 2020 ), potentiometry (Gandía-Romero et al, 2016 ), and chronopotentiometry (Abbas et al, 2013 ; Abbas, 2015 ). Among these, the chronopotentiometry technique based on an electrochemical method is employed for the indicative determination of Cl − content in infrastructures, the principle of which is described as follows.…”

Section: Introductionmentioning

confidence: 99%

Facial Fabrication and Characterization of Novel Ag/AgCl Chloride Ion Sensor Based on Gel-Type Electrolyte

et al. 2020

View full text Add to dashboard Cite

In this study, a novel chloride ion (Cl −) sensor based on Ag wire coated with an AgCl layer was fabricated using a gel-type internal electrolyte and a diatomite ceramic membrane, which played an important role in preventing electrolyte leakage from the ion-selective electrode. The sensing performance, including reversibility, response, recovery time, low detection limit, and the long-term stability, was systemically investigated in electrolytes with different Cl − contents. The as-fabricated Cl − sensor could detect Cl − from 1 to 500 mM KCl solution with good linearity. The best response and recovery time obtained for the optimized sensor were 0.5 and 0.1 s, respectively, for 10 mM KCl solution. An exposure period of over 60 days was used to evaluate the stability of the Cl − sensor in KCl solution. A relative error of 2% was observed between the initial and final response potentials. Further, a wireless sensing system based on Arduino was also investigated to measure the response potential of Cl − in an electrolyte. The sensor exhibited high reliability with a low standard error of measurement. This type of sensor is crucial for fabricating wireless Cl − sensors for applications in reinforced concrete structures along with favorable performances.

show abstract

Concrete Crack Monitoring Using a Novel Strain Transfer Model for Distributed Fiber Optics Sensors

Cited by 72 publications

References 29 publications

Experimental and Numerical Investigation on the Strain Response of Distributed Optical Fiber Sensors Bonded to Concrete: Influence of the Adhesive Stiffness on Crack Monitoring Performance

Experimental and Numerical Investigation on the Strain Response of Distributed Optical Fiber Sensors Bonded to Concrete: Influence of the Adhesive Stiffness on Crack Monitoring Performance

Distributed Optical Fiber Sensing Bonding Techniques Performance for Embedment inside Reinforced Concrete Structures

Facial Fabrication and Characterization of Novel Ag/AgCl Chloride Ion Sensor Based on Gel-Type Electrolyte

Contact Info

Product

Resources

About