&lt;title&gt;Fiber optic Bragg grating sensor network installed in a concrete road bridge&lt;/title&gt;

Maaskant, R.; Alavie, A. Tino; Measures, Raymond M.; Ohn, Myo Myint; Karr, Shawn E.; Glennie, Derek J.; Wade, C. A.; Tadros, Gamil; Rizkalla, Sami

doi:10.1117/12.173977

Cited by 23 publications

(19 citation statements)

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“…Early work examined the response of gratings embedded in concrete beams [132]. One of the first full field trails of the technology was the use of a four grating sensor system embedded into a concrete bridge in Calgary, Canada by the University of Toronto group [133]. This system actually used fiber Bragg grating laser sensors, the operation of which is reported in the next section.…”

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confidence: 98%

A Review of Recent Developments in Fiber Optic Sensor Technology

Kersey

1996

Optical Fiber Technology

399

214

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confidence: 98%

A Review of Recent Developments in Fiber Optic Sensor Technology

Kersey

1996

Optical Fiber Technology

399

214

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“…Recent studies have shown how DIC can be an effective tool for full-field monitoring [16,[31][32][33][34], and thus be a beneficial method for both crack detection and crack width monitoring. Although not applied in this study, fiber optic sensing is another promising tool which can involve strain and crack monitoring [35][36][37][38].…”

Section: Literature Reviewmentioning

confidence: 99%

Identification of Stop Criteria for Large-Scale Laboratory Slab Tests Using Digital Image Correlation and Acoustic Emission

et al. 2022

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Advanced monitoring methods are required to identify stop criteria in proof-load tests. In this study, the combined methodology of two-dimensional digital image correlation and acoustic emission is investigated for its applicability for future implementation in field tests. The two monitoring systems are deemed to provide valuable insight with external measurements from digital image correlation and internal measurements from acoustic emission. Two overturned T-section reinforced concrete slabs (0.37 × 1.7 × 8.4 m) tested under laboratory conditions are used for the assessment. The first slab test served as a preliminary test to enable sensor placement and creation of a relevant loading protocol. The main scientific results lead to a proposal for a test procedure using the combined methodology based on results, observations, and experiences from an individual stop criteria assessment for the two methods. The results include full-field plots, an investigation of the time of crack detection and monitoring of crack widths with digital image correlation, and a qualitative assessment of activity vs. load followed by a quantitative evaluation of calm ratios using acoustic emission. The individual results show that both digital image correlation and acoustic emission can identify damage occurrence earlier than other secondary methods. At crack detection (415 kN), crack widths were measured at widths between 0.078 mm to 0.125 mm and can be monitored until reaching the stop criterion at 463 kN (Eurocode SLS threshold of wmax = 0.2 mm). The acoustic emission results were limited by the pre-defined loading protocol and thus, only indicated that damage occurred sometime between 300 kN and 500 kN (pre-defined load levels). Therefore, the proposal for test procedure involves a methodology, where the loading protocol may be updated during testing based on monitoring results and thus provide even more valuable data.

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“…Optical fibers and sensors are often promoted to work in electromagnetic fields, at high temperature and humidity, or in aggressive chemical environment. Especially fiber Bragg grating (FBG) sensors have been demonstrated to operate in applications from airplanes to civil infrastructure like dams and bridges [3][4][5][6][7][8][9][10]. However, there is a long way from a laboratory prototype to a reliable, standardized industrial sensor system.…”

Section: Introductionmentioning

confidence: 99%

Reliability, availability, and maintainability considerations for fiber optical sensor applications

2006

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The paper gives an overview of reliability, availability, and maintainability of fiber optical sensors, three key factors on which standards and validation should be based and which are required for successful industrialization. The examples given are based on two long term applications with fiber optical Bragg gratings -the surveillance of two bridges (civil engineering). However, similar reflections are required for any type of application and any optical fiber sensors. Recommendations are given to improve the confidence and acceptance of possible users in fiber optical sensing systems. It is shown that with proper installation lifetimes of 50 years are possible.

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<title>Fiber optic Bragg grating sensor network installed in a concrete road bridge</title>

Cited by 23 publications

References 0 publications

A Review of Recent Developments in Fiber Optic Sensor Technology

A Review of Recent Developments in Fiber Optic Sensor Technology

Identification of Stop Criteria for Large-Scale Laboratory Slab Tests Using Digital Image Correlation and Acoustic Emission

Reliability, availability, and maintainability considerations for fiber optical sensor applications

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