Distributed Strain Measurement along a Concrete Beam via Stimulated Brillouin Scattering in Optical Fibers

Bernini, Romeo; Minardo, Aldo; Ciaramella, S; Minutolo, Vincenzo; Zeni, Luigi

doi:10.1155/2011/710941

Cited by 14 publications

(6 citation statements)

References 5 publications

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“…Schematic illustration of the FBG system for strain measurement (Lau et al, 2001). Strain measured from the FBG sensor and strain gauge for beams SB-S1 and SB-S2 (Lau et al, 2001). are also able to detect the formation of a crack in the midsection of the concrete beam (Bernini et al, 2011). Zhou et al (2012) integrated optic fiber sensors in fiber-reinforced polymer and embedded them into concrete pavement to monitor the three-dimensional (3D) strain distribution of concrete.…”

Section: Non-intrinsic Self-sensing Concrete and Structuresmentioning

confidence: 99%

Smart concretes and structures: A review

Han

Wang

Dong

et al. 2015

Journal of Intelligent Material Systems and Structures

220

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Smart concretes and structures are intelligent systems that have properties different from normal concrete, such as selfsensing and self-healing properties, or have the ability to react upon an external stimulus, such as stress and temperature. The ''smartness'' of concrete and structures is achieved through material composition design, special processing, introduction of other functional components, or modification of the microstructure. They are designed to meet specific requirements through tailored properties for improving serviceability, safety, reliability, longevity, and durability of the infrastructures and reducing the life-cycle costs of the infrastructures. This article reviews the recent researches of various smart concretes and structures, with attentions to their principles, fabrication, and properties. Future challenges in the development and applications of smart concretes and structures are also discussed.

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Section: Non-intrinsic Self-sensing Concrete and Structuresmentioning

confidence: 99%

Smart concretes and structures: A review

Han

Wang

Dong

et al. 2015

Journal of Intelligent Material Systems and Structures

220

View full text Add to dashboard Cite

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“…A number of studies in the area of distributed optical fibre measurement technology have been conducted under laboratory conditions over the last few years. Attention was paid to embedding fibres into a concrete medium, 4 detecting damage (cracks) within concrete structures, 5 and analysing their strain and temperature distributions 6 using different optical phenomena such us Brillouin 7 or Rayleigh 8 scattering.…”

Section: Introductionmentioning

confidence: 99%

Strain and crack analysis within concrete members using distributed fibre optic sensors

Sieńko¹,

Zych²,

Bednarski

et al. 2018

Structural Health Monitoring

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This article presents laboratory tests, with the purpose being to verify the suitability of standard optical fibres in a tight jacket for advanced strain analysis within concrete members. An optical reflectometer was used to enable the optical signal to be processed on the basis of the Rayleigh scattering phenomenon, so that strains and/or temperature changes were determined along the length of the measuring fibre. The measurements were carried out continuously in a geometrical sense (distributed measurements), with a spatial resolution starting from as fine as 5 mm. The arrangement of optical fibres inside the heterogeneous concrete medium and on its surface allowed for the identification and detailed analysis of local phenomena such as cracks. Remote and early location of structural damage with an estimation of its scale provides new opportunities for the monitoring of the structural health of reinforced concrete structures, facilitating the interpretation of its behaviour as well as failure risk management based on comprehensive and reliable measurement data. If traditional spot techniques are used, this approach is not possible. The aim of the initial studies was to analyse the strain distributions over compressed and tensioned measurement sections located on the surface of a cylindrical specimen of concrete. In the tests which followed, the reinforced concrete rod was eccentrically tensioned with fibre optics installed inside. Qualitative and quantitative verification of crack widths was made, with a narrow range up to 0.05 mm and a wider one to 0.30 mm. The results of the studies show very good accuracy of optical fibre sensor technology as a reference technique during the analysis of microcracks and narrow cracks, and moderate accuracy in the case of wider cracks. Despite using optical fibres in a tight jacket which mediates in strain transfer, the results obtained can be very suitable for the assessment of the structural condition of the member under consideration. It is also worth noting that the tests conducted indicate the effectiveness of distributed optical fibre technology for the analysis of concrete homogeneity and its structural behaviour within compressed areas, as it is possible to calculate strains over measuring bases that start from lengths as short as 5 mm.

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“…The principal characteristics of all of these DOFSs are shown in Table 1. Also, DOFSs prototypes had been developed by different research groups (Bernini et al 2011, Torres 2012). These prototype DOFSs were proved in laboratory test and field test with acceptable results.…”

Section: Dofss Availablementioning

confidence: 99%

SHM by DOFS in civil engineering: a review

Rodríguez¹,

Casas²,

Villalba³

2015

Structural Monitoring and Maintenance

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Abstract. This paper provides an overview of the use of different Distributed Optical Fiber Sensor systems (DOFSs) to perform Structural Health Monitoring (SHM) in the specific case of civil engineering structures. Nowadays, there are several methods available for extracting distributed measurements from optical fiber, and their use have to be according with the aims of the SHM performance. The continuous-in-space data is the common advantage of the different DOFSs over other conventional health monitoring systems and, depending on the particular characteristics of each DOFS, a global and/or local health structural evaluation is possible with different accuracy. Firstly, the fundamentals of different DOFSs and their principal advantages and disadvantages are presented. Then, laboratory and field tests using different DOFSs systems to measure strain in structural elements and civil structures are presented and discussed. Finally, based on the current applications, conclusions and future trends of DOFSs in SHM in civil structures are proposed.

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Distributed Strain Measurement along a Concrete Beam via Stimulated Brillouin Scattering in Optical Fibers

Cited by 14 publications

References 5 publications

Smart concretes and structures: A review

Smart concretes and structures: A review

Strain and crack analysis within concrete members using distributed fibre optic sensors

SHM by DOFS in civil engineering: a review

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