Fiber Optic Sensors and Digital Image Correlation for Measuring Deformations in Reinforced Concrete Beams

Mirzazadeh, M. Mehdi; Green, Mark F.

doi:10.1061/(asce)be.1943-5592.0001189

Cited by 15 publications

(9 citation statements)

References 35 publications

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“…Different interrogation units are available nowadays based on the analysis of the Brillouin and Rayleigh backscattered light all over the silica optical fiber. While it is now well established that these systems have the ability to perform accurate strain measurements and detect the presence of cracks [1][2][3][4], the possibility to quantify the crack openings through the distributed strain measurements has been recently studied [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Distributed Fiber Optic Sensors for Multiple Crack Monitoring in Reinforced Concrete Structures

Bassil¹,

Niederleithinger²,

Wang³

et al. 2019

Structural Health Monitoring 2019

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Section: Introductionmentioning

confidence: 99%

“…Variation of the estimated COD from LVDT and DFOS techniques for cracks(4,7,10) at the Bottom (FO Line7B) and Top (FO Line7T) levels.…”

mentioning

confidence: 99%

Distributed Fiber Optic Sensors for Multiple Crack Monitoring in Reinforced Concrete Structures

Bassil¹,

Niederleithinger²,

Wang³

et al. 2019

Structural Health Monitoring 2019

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“…Mehdi Mirzazadeh and Green [ 67 ] studied an application of OFDR DOFS and DIC for the measurement of the crack widths, deflections, and strains in eight large-scale RC beams tested under static and fatigue loading at room temperature (+15 °C) and at low temperature (−20 to −25 °C). Half of the 200 × 400 × 4200 mm beams had no shear reinforcements whilst the remaining ones did.…”

Section: Laboratory Experimental Applicationsmentioning

confidence: 99%

A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

Bado

Casas

2021

Sensors

234

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The present work is a comprehensive collection of recently published research articles on Structural Health Monitoring (SHM) campaigns performed by means of Distributed Optical Fiber Sensors (DOFS). The latter are cutting-edge strain, temperature and vibration monitoring tools with a large potential pool, namely their minimal intrusiveness, accuracy, ease of deployment and more. Its most state-of-the-art feature, though, is the ability to perform measurements with very small spatial resolutions (as small as 0.63 mm). This review article intends to introduce, inform and advise the readers on various DOFS deployment methodologies for the assessment of the residual ability of a structure to continue serving its intended purpose. By collecting in a single place these recent efforts, advancements and findings, the authors intend to contribute to the goal of collective growth towards an efficient SHM. The current work is structured in a manner that allows for the single consultation of any specific DOFS application field, i.e., laboratory experimentation, the built environment (bridges, buildings, roads, etc.), geotechnical constructions, tunnels, pipelines and wind turbines. Beforehand, a brief section was constructed around the recent progress on the study of the strain transfer mechanisms occurring in the multi-layered sensing system inherent to any DOFS deployment (different kinds of fiber claddings, coatings and bonding adhesives). Finally, a section is also dedicated to ideas and concepts for those novel DOFS applications which may very well represent the future of SHM.

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“…Los sensores de fibra óptica también han sido muy empleados para estudiar deformaciones [25], [26], [27], [28], [29] y flechas [30], [31], [32], [33], [34], [35], [36], objeto de este artículo.…”

Section: Introductionunclassified

Influence of the cracking moment of two reinforced concrete beams obtained through fiber optic sensors in the determination of their instant deflections = Influencia del momento de fisuración de dos vigas de hormigón armado obtenido mediante sensores de fibra óptica en la determinación de sus flechas instantáneas

Díaz¹

2021

BMA

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This article investigates the measurement of the real instantaneous deflection using a displacement transducer, and with fiber optic sensors embedded and welded to the corrugated rebars in order to determine the real cracking moment of the concrete. Two reinforced concrete beams simply resting on the support with point loading in the center of the span have been tested, at which point the maximum deflection is reached. Both the sensors and the displacement transducer have been placed in the center of the span. Different loading steps have been applied to the beams, using a loading cylinder, and the measurement of the load applied has been determined using a loading cell. During the loading process of the beams, the real moment at which they cracked has been determined, and which determines the change from the gross inertia to the cracked inertia in the study of the deflections. Two expressions have been deduced that modify the formula of the instantaneous deflection and demonstrate that they are valid to determine in a much more precise way the instantaneous deflections on simply resting on the support concrete beams. Future lines of research will concentrate on studying the instantaneous deflections of more complex beams, and thus obtain expressions that more closely approximate their actual behaviour.

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Fiber Optic Sensors and Digital Image Correlation for Measuring Deformations in Reinforced Concrete Beams

Cited by 15 publications

References 35 publications

Distributed Fiber Optic Sensors for Multiple Crack Monitoring in Reinforced Concrete Structures

Distributed Fiber Optic Sensors for Multiple Crack Monitoring in Reinforced Concrete Structures

A Review of Recent Distributed Optical Fiber Sensors Applications for Civil Engineering Structural Health Monitoring

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