Application of fiber-optic strain sensors for monitoring of a pre-stressed concrete box girder bridge

Banerji, P.; Chikermane, Sanjay; Grattan, K. T. V.; Sun, Tao; Surre, F.; Scott, Richard

doi:10.1109/icsens.2011.6127255

Cited by 6 publications

(3 citation statements)

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“…Depending on the type of structure, a range of parameters such as strain, temperature, corrosion and thickness reduction, leakage acoustics, and pressure may be important to quantify. Despite the existence of several methods to detect damage in civil infrastructure [ 110 ], most of them suffer from various disadvantages such as lack of portability, susceptibility to electromagnetic interference, and lack of capability for continuous and remote monitoring over large distances. In 1989, optical fiber sensors were introduced as concrete structural monitors [ 12 ] and became a very important element in civil infrastructures, such as bridges or pipelines [ 11 ].…”

Section: Optical Fiber Sensing Networkmentioning

confidence: 99%

Optical Fiber Sensors and Sensing Networks: Overview of the Main Principles and Applications

Pendão

Silva

2022

Sensors

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Optical fiber sensors present several advantages in relation to other types of sensors. These advantages are essentially related to the optical fiber properties, i.e., small, lightweight, resistant to high temperatures and pressure, electromagnetically passive, among others. Sensing is achieved by exploring the properties of light to obtain measurements of parameters, such as temperature, strain, or angular velocity. In addition, optical fiber sensors can be used to form an Optical Fiber Sensing Network (OFSN) allowing manufacturers to create versatile monitoring solutions with several applications, e.g., periodic monitoring along extensive distances (kilometers), in extreme or hazardous environments, inside structures and engines, in clothes, and for health monitoring and assistance. Most of the literature available on this subject focuses on a specific field of optical sensing applications and details their principles of operation. This paper presents a more broad overview, providing the reader with a literature review that describes the main principles of optical sensing and highlights the versatility, advantages, and different real-world applications of optical sensing. Moreover, it includes an overview and discussion of a less common architecture, where optical sensing and Wireless Sensor Networks (WSNs) are integrated to harness the benefits of both worlds.

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Section: Optical Fiber Sensing Networkmentioning

confidence: 99%

Optical Fiber Sensors and Sensing Networks: Overview of the Main Principles and Applications

Pendão

Silva

2022

Sensors

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“…Many works describe embedded sensors for different types of structures: reinforced concrete wall, pre-stressed concrete bridge [49], the optical fiber in wind turbine blade [50], integrated optical fiber in functionalized carbon structures (FCS) [51] and also for the detection of vibration, surface cracking and buckling phenomena [52][53][54] in reinforced concrete, pre-stressed concrete (PSC) [55], and post-tensioned PSC [56], where the effectiveness of distributed sensors is highlighted.…”

Section: Introductionmentioning

confidence: 99%

NSHT: New Smart Hybrid Transducer for Structural and Geotechnical Applications

et al. 2020

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This work describes the application of a new transducer prototype for continuous monitoring in both the structural and geotechnical fields. The transducer is synthetically constituted by a wire of optical fiber embedded between two fiber tapes (fiberglass or carbon fiber) and glued by a matrix of polyester resin. The fiber optical wire ends have been connected to a control unit whose detection system is based on Brillouin optical time-domain frequency analysis. Three laboratory tests were carried out to evaluate the sensor’s reliability and accuracy. In each experiment, the transducer was applied to a sample of inclinometer casing sets in different configurations and with different constraint conditions. The experimental collected data were compared with theoretical models and with data obtained from the use of different measuring instruments to perform validation and calibration of the transducer at the same time. Several diagrams can compare the transducer and highlight its suitability for the monitoring and maintenance of structures. The characteristic of the transducer suggests its use as a mixed system for reinforcing and monitoring, especially in the lifetime maintenance of critical infrastructures such as transportation and service networks, and historical heritage.

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“…Several experiments have been performed in the BOTDA field with embedded sensors for different types of structures: reinforced concrete wall [26], prestressed concrete bridge [27], integrated optical fiber in functionalized carbon structures (FCS) [28] and also for the detection of vibration, surface cracking and buckling phenomena [29,31] in reinforced concrete, pre-stressed concrete (PSC) [32] and post-tensioned PSC [33].…”

Section: Introductionmentioning

confidence: 99%

Non Linear Strain Measures on Concrete Structures by Means of Embedded Optical Fiber Sensors

Minutolo

Zona

2018

Preprint

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Optical fiber sensors have become a widely-used tool to perform life-long monitoring of large structures. Different set-ups of sensors can be used to obtain information at different scopes. In this paper, the application of a portable Brillouin optical time domain analysis sensor applied to reinforced concrete beams is presented. The sensor is made up of a single-mode optical fiber applied to the structure that enables the measurement of tensile and compressive axial strain along the beams. The fiber is embedded into a concrete casting and fixed along the reinforcement bars so that a complete correlation can be obtained regarding strain and displacements in linear and non-linear flexural response. The use of four sensing fibers positioned along the beam's length at different vertical positions makes it possible to read the strain variation within the cross-section. In accordance with Bernoulli’s hypothesis, this allows curvature diagrams to be obtained across the structure. The measured curvature is used to set up the moment–curvature relationship, which highlights the possibility of the sensor monitoring structures continuously in space and time.

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Application of fiber-optic strain sensors for monitoring of a pre-stressed concrete box girder bridge

Cited by 6 publications

References 1 publication

Optical Fiber Sensors and Sensing Networks: Overview of the Main Principles and Applications

Optical Fiber Sensors and Sensing Networks: Overview of the Main Principles and Applications

NSHT: New Smart Hybrid Transducer for Structural and Geotechnical Applications

Non Linear Strain Measures on Concrete Structures by Means of Embedded Optical Fiber Sensors

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