Discontinuous Brillouin strain monitoring of small concrete bridges: comparison between near-to-surface and smart FRP fiber installation techniques

Bastianini, Filippo; Rizzo, Andrea; Galati, Nestore; Deza, Ursula; Nanni, Antonio

doi:10.1117/12.594760

Cited by 27 publications

(12 citation statements)

References 11 publications

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“…In addition, authors claim that NSF installation resulted to be much more problematic for the amount of dust and noise produced during groove cutting. All the results drive to the conclusion that for this kind of application in terms of performance enhancements, installation cost, and time reduction the smart-FRP system has to be considered as an optical sensor installation in bridges technique [72]. On Götaälv Bridge (built in 1939 in Sweden) severe cracking in zones above columns and a minor collapse in a structural element were observed.…”

Section: Bridges and Monitoringmentioning

confidence: 78%

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Brillouin Distributed Fiber Sensors: An Overview and Applications

2012

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Section: Bridges and Monitoringmentioning

confidence: 78%

“…Near-to-surface fiber (NSF) embedding and smart-FRP (fiber reinforced polymer) sensor bonding techniques have been experimented on small reinforced concrete (RC) bridges subject to a diagnostic load test [72]. Two bridges with similar dimensions were instrumented and tested under similar environmental conditions.…”

Section: Bridges and Monitoringmentioning

confidence: 99%

Brillouin Distributed Fiber Sensors: An Overview and Applications

2012

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“…During the static load tests, these authors successfully obtained a continuous strain distribution along the whole beam. Filippo Bastianini et al also obtained the strain distribution of a concrete bridge under static load with BOTDR [14]. Due to its great sensing advantages, some researchers have also applied BOTDR to tunnel monitoring.…”

Section: Introductionmentioning

confidence: 99%

Structural Monitoring and Performance Assessment of Shield Tunnels during the Operation Period, Based on Distributed Optical-Fiber Sensors

2019

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The weak parts of shield tunnels are not obvious, so it is urgently necessary to implement distributed monitoring based on an advanced sensing method. As the horizontal loads at both sides of the shield tunnel present a type of symmetric distribution, the deformation parameters under the vertical loads are often selected as the key monitored parameters, such as convergence, settlement, and seam opening. In this paper, the monitoring of the proposed deformation parameters is innovatively implemented with only one sensing technology, namely distributed optical-fiber strain sensing technology. First, the improved distributed optical-fiber sensors are introduced with the sensing performance. Second, a structural health monitoring (SHM) system for operational shield tunnels is proposed, including optical-fiber sensor installation, data logging and saving, key parameter analysis, and structural health assessment. The key monitoring theory and technology are also proposed. The proposed system has been verified by experiments at the Nanjing Yangtze River tunnel. In the experiments, the proposed optical-fiber sensors were installed on the surface of a selected tunnel ring, with a longitudinal span of approximately 90 m long. The experiments were conducted over 55 days to measure the distributed strain and temperature. Then the key parameters were obtained from the measurements, with which the structural health was assessed. The possibility that the shield tunnel SHM system can be constructed with the improved distributed optical-fiber sensors, monitoring theory, and technology is proven.

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“…The same research group conducted another test program with the same BOTDR system, this time in a larger bridge. The structural characteristics of the bridges and of the loading tests are described in Bastiniani et al (2005b), Bastiniani et al (2005c), respectively. These three bridges are shown in Fig.…”

Section: Monitoring Static Load Tests On Bridgesmentioning

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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Discontinuous Brillouin strain monitoring of small concrete bridges: comparison between near-to-surface and smart FRP fiber installation techniques

Cited by 27 publications

References 11 publications

Brillouin Distributed Fiber Sensors: An Overview and Applications

Brillouin Distributed Fiber Sensors: An Overview and Applications

Structural Monitoring and Performance Assessment of Shield Tunnels during the Operation Period, Based on Distributed Optical-Fiber Sensors

SHM by DOFS in civil engineering: a review

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