Commissioning and Evaluation of a Fiber-Optic Sensor System for Bridge Monitoring

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

doi:10.1109/jsen.2013.2256599

Cited by 33 publications

(16 citation statements)

References 12 publications

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“…There are several non-invasive methods for detecting structural damage, such as acoustic emission (AE) [10], as mentioned previously, and methods based on optical fibers [11], among others.…”

Section: Emi Technique Backgroundmentioning

confidence: 99%

Piezoelectric Transducers Assessed by the Pencil Lead Break for Impedance-Based Structural Health Monitoring

2015

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The pencil lead break (PLB) is a well-known method for characterizing acoustic emission sensors. In this paper, we analyze the effectiveness of this method in characterizing piezoelectric transducers for structural health monitoring (SHM) systems based on the electromechanical impedance (EMI) technique. Tests were carried out on aluminum beams of different sizes, and two types of transducers were considered: 1) lead zirconate titanate ceramics and 2) macrofiber composite devices. The experimental results indicate a clear relationship between the variation in the electrical impedance signature of the transducer and power spectral density obtained with the PLB method. Therefore, the PLB can be a simple and effective method for assessing the sensitivity of transducers for damage detection in SHM systems based on the EMI technique.

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Section: Emi Technique Backgroundmentioning

confidence: 99%

Piezoelectric Transducers Assessed by the Pencil Lead Break for Impedance-Based Structural Health Monitoring

2015

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“…Twenty four strain sensors were divided into three columns, respectively, arranged in the first span bridge bottom 1/4, 1/2, 3/4 points across, each column for a group of eight strain sensors. At the ends of each group, a temperature compensation sensor was installed [7,8]. The wavelength of the sensors in each column was different, connected with each other.…”

Section: Long-term Monitoring Systemmentioning

confidence: 99%

Design of an enhanced sensitivity FBG strain sensor and application in highway bridge engineering

Zhang

Liu

et al. 2014

Photonic Sens

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Abstract:The theoretical design method of enhanced sensitivity fiber grating (FBG) strain sensors was given, and moreover high qualified strain sensors were developed and fabricated, whose sensing properties were good for practical applications. The strain sensor with cylindrical shell encapsulation contained three tubular structures, due to the uneven surface structure, in the area of the strain concentration, improving the sensitivity. It could achieve the embedment strain measurement and surface measurement and had the advantages of the easy installation. The good agreement was obtained between the measurements and theoretical simulation results. After each calibration test, twenty-four FBG strain sensors and six FBG temperature compensation sensors have been installed on the undersurface of the box girder of Diaoshuiyan bridge in Yongtaiwen highway. Finally, we built up a long-term structure health system for the highway bridge.

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“…As the time on an active bridge was limited, some redundancy was built into the deployed sensors at the centre span (Scott et al, 2013). Additional electrical strain gauges were installed at the end of the box to investigate the possibility of end support restraints -a deviation from the simply supported condition (see Figure 2).…”

Section: Description Of the Bridge And Test Programmementioning

confidence: 99%

Structural monitoring for asset management of railway bridges

Banerji¹,

Chikermane²,

Scott³

et al. 2014

Proceedings of the Institution of Civil Engineers - Bridge Engi

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This paper demonstrates the advantages of site monitoring to aid modelling of the existing condition of a railway bridge with structural problems and to assess the current structure and future remediation. The authors undertook monitoring and assessment on a major 28-span post-tensioned prestressed concrete box-girder bridge on a strategically important railway line in India. The bridge exhibited significant longitudinal web cracking, which restricted its load-carrying capacity to relatively light urban passenger rolling stock. Monitoring of rail traffic was supplemented by full-scale load tests for both static and dynamic loading. Optical strain sensors and electric resistance strain gauges were used for strain measurement and piezoelectric sensors were used to record accelerations. Sensors were also installed to record crack widths. A programme of numerical modelling was undertaken with finite-element models developed for both cracked and uncracked conditions. Results were compared with field data and the models were then refined to achieve a representative model for use as a predictive tool for future assessment and structural remediation of the bridge.

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Commissioning and Evaluation of a Fiber-Optic Sensor System for Bridge Monitoring

Cited by 33 publications

References 12 publications

Piezoelectric Transducers Assessed by the Pencil Lead Break for Impedance-Based Structural Health Monitoring

Piezoelectric Transducers Assessed by the Pencil Lead Break for Impedance-Based Structural Health Monitoring

Design of an enhanced sensitivity FBG strain sensor and application in highway bridge engineering

Structural monitoring for asset management of railway bridges

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