Vibration-based monitoring of an FRP footbridge with embedded fiber-Bragg gratings: Influence of temperature vs. damage

Anastasopoulos, D.; Reynders, Edwin; François, Stijn; Roeck, Guido De; Lysebetten, Gust Van; Itterbeeck, Petra Van; Huybrechts, Noël

doi:10.1016/j.compstruct.2022.115295

Cited by 12 publications

(5 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As can be seen from equation (6), when coupling a fber Bragg grating to a substrate to measure its strain, the change in temperature and the diference in the coefcient of thermal expansion between the fber Bragg grating and the substrate material should be excluded from the amount of change in the central wavelength, otherwise it will result a large error in the measured strain. Terefore, the temperature compensation of the FBG is needed.…”

Section: Fbg Temperature Compensationmentioning

confidence: 99%

“…With the rapid development of structural health monitoring (SHM) [1][2][3][4][5], the application of new materials and advanced processes, the structural system becomes increasingly complex, and the traditional structural monitoring sensors can hardly meet the long-term monitoring needs. However, due to its small size, light weight, good stability, strong antiinterference, long-distance transmission, and other signifcant advantages of fber Bragg grating (FBG) [6][7][8][9][10][11], it applies for health monitoring of structural performance widely and in-depth, for example, online monitoring of transformers [12], sliding warning of slopes [13], long-term health monitoring of roads [14], corrosion rate monitoring of prestressed structures [15], and real-time monitoring of the full corrosion process of reinforcement in concrete structures [16], monitoring of bridge structures during proof load testing (PLT) [17], and other structural health monitoring studies [18][19][20][21]. Strain is an important performance parameter of engineering structures and is closely related to the internal forces and deformation of the structure, so strain monitoring is one of the most important means of obtaining the health status of engineering structures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of a High-Sensitivity and Adjustable FBG Strain Sensor for Structural Monitoring

Qin,

Li,

Zhu

et al. 2023

Structural Control and Health Monitoring

View full text Add to dashboard Cite

In this paper, a new fiber Bragg grating (FBG) strain sensor with adjustable sensitivity is invented. The sensitivity adjustment, strain sensing, and temperature compensation principles of the sensor and the corresponding formulae are developed. The prototype sensor specimen is developed, and a series of tests are performed to investigate its strain sensitivity and temperature compensation characteristics. The results show that the strain sensitivity of the sensor can be adjusted effectively by the correspondent L/LFBG parameter, with an acceptable discrepancy within ±5% of the theoretical value. The linearity, repeatability, and hysteresis were analyzed, and the errors were 0.98%, 1.15%, and 0.09%, respectively, with excellent performance. When the temperature difference was 20°C, through temperature compensation calibration, the error between the monitored strain and the actual strain was within 5% after temperature compensation correction, showing that this new type of FBG strain sensor can meet the strain monitoring needs of various engineering structures and provide reliable data acquisition.

show abstract

Section: Fbg Temperature Compensationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of a High-Sensitivity and Adjustable FBG Strain Sensor for Structural Monitoring

Qin,

Li,

Zhu

et al. 2023

Structural Control and Health Monitoring

View full text Add to dashboard Cite

show abstract

“…Relevant scholars have also carried out a series of research on structural damage localization methods based on external excitation and dynamic norm identification. Dimitrios Anastasopoulos et al [18] realized the identification of structural damage location of bridge structure by adopting external impact load as excitation, and obtaining the information of the change in strain mode norms before and after the bridge damage. Based on the external excitation, Wang et al [19] studied a method of pipeline structural health monitoring, calculated the weighted intrinsic frequency change rate and strain modal change rate caused by structural crack damage, and realized the structural crack damage localization.…”

Section: Introductionmentioning

confidence: 99%

Spacecraft Segment Damage Identification Method Based on Fiber Optic Strain Difference Field Reconstruction and Norm Calculation

Xu,

Zeng,

Chen

et al. 2023

Sensors

View full text Add to dashboard Cite

Real-time online identification of spacecraft segment damage is of great significance for realizing spacecraft structural health monitoring and life prediction. In this paper, a damage response characteristic field inversion algorithm based on the differential reconstruction of strain response is proposed to solve the problem of not being able to recognize the small damages of spacecraft structure directly by the strain response alone. Four crack damage location identification methods based on vector norm computation are proposed, which realize online identification and precise location of structural damage events without external excitation by means of spacecraft structural working loads only. A spacecraft segment structural damage monitoring system based on fiber optic grating sensors was constructed, and the average error of damage localization based on the curvature vector 2 norm calculation was 2.58 mm, and the root-mean-square error was 1.98 mm. The results show that the method has superior engineering applicability for on-orbit service environments.

show abstract

“…In line with the variability of the structural parameters and the need to characterise the dynamic behaviour of the structure realistically, effort is currently being devoted to the investigation of temperature effects on the footbridges modal parameters, 26 and on how to discern those from damagerelated variations. 27 In the present work the dynamic response of an existing steel truss footbridge is evaluated after detecting relevant vertical and lateral vibrations on its main span. The structural configuration leads to an important participation of three-dimensional modes.…”

Section: Introductionmentioning

confidence: 99%

“…Pfeil et al (25) propose a biodynamic model based on the single-degree-of-freedom (SDOF) system subjected to base excitation. In line with the variability of the structural parameters and the need to characterize the dynamic behavior of the structure realistically, effort is currently being devoted to the investigation of temperature effects on the footbridges modal parameters (26), and on how to discern those from damage-related variations (27).…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling and vibration serviceability assessment of a steel footbridge with a significant 3D dynamic behaviour

Roda-Casanova

Hernández-Figueirido

Sancho-Bru

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

This paper focuses on the vibration serviceability assessment and numerical modelling of an existing steel truss footbridge located in the outskirts of Castellón, Spain. The footbridge is rather slender and composed by a main span and two access ramps supported on three 4-arm piers of different heights. Due to the connection between the main span and the ramps at the top of the tall piers, longitudinal and lateral bending/torsion natural coupled modes of vibration coexist at low frequencies, with a relevant contribution of the piers and access ramps deformation. This leads to a significant three-dimensional and rather complex dynamic response under service conditions. With the aim of characterising the structural dynamic properties and assessing the level of vibrations induced by crossing pedestrians, two in-situ experimental test programmes are conducted. On the one hand, the structural response is measured during several hammer tests and the modal properties are identified and used to update a detailed 3D numerical model by means of a Genetic Algorithm. Due to the lack of information regarding the detailing of the piers foundations, two alternative models are analysed. The relevance of the pier-foundation system rotational stiffness is highlighted for the particular configuration. On the other hand, the footbridge main span response is recorded under different pedestrian activities: walking, running and vandal simulated actions. Finally, the vibration serviceability of the structure is assessed based on current codes and regulations.

show abstract

Vibration-based monitoring of an FRP footbridge with embedded fiber-Bragg gratings: Influence of temperature vs. damage

Cited by 12 publications

References 57 publications

Development of a High-Sensitivity and Adjustable FBG Strain Sensor for Structural Monitoring

Development of a High-Sensitivity and Adjustable FBG Strain Sensor for Structural Monitoring

Spacecraft Segment Damage Identification Method Based on Fiber Optic Strain Difference Field Reconstruction and Norm Calculation

Numerical modelling and vibration serviceability assessment of a steel footbridge with a significant 3D dynamic behaviour

Contact Info

Product

Resources

About