Experimental and numerical analysis of a hybrid FBG long gauge sensor for structural health monitoring

Górriz, Benjamín Torres; García, Pedro Antonio Calderón; Payá-Zaforteza, Ignacio

doi:10.1088/0957-0233/25/12/125107

Cited by 9 publications

(5 citation statements)

References 18 publications

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“…Only one sensor (LVDT 3) was positioned on the opposite diagonal elliptic arch (S1-S3). The same procedure was followed for the positioning of the Fibre Optic Sensors [23] [24], as shown in Figure 6.…”

Section: Experimental Set-up and Data Acquisitionmentioning

confidence: 99%

A full-scale timbrel cross vault subjected to vertical cyclical displacements in one of its supports

Torres

Bertolesi

Calderón

et al. 2019

Engineering Structures

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Up-and-down cyclical displacement of supports-foundations, due for example to the presence of expansive soils, can affect the integrity of a structure and may even lead to its collapse. A recent study carried out at the ICITECH laboratories of the Universitat Politècnica de València analysed the effects of earth settlements on the behaviour of masonry cross vaults. One of the tests involved the construction and testing of a full-scale timbrel cross vault, one of whose supports was subjected to up-and-down vertical displacement cycles. The 4×4 m 2 vault was composed of four 3.6 m diameter arches supporting a masonry web. Vertical displacements were applied to one of the supports by means of two synchronised mechanical jacks. The results of the tests provide valuable information to the scientific community, architects and engineers on the behaviour of timbrel cross vaults when one of their supports is subjected to cyclical movements.

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Section: Experimental Set-up and Data Acquisitionmentioning

confidence: 99%

A full-scale timbrel cross vault subjected to vertical cyclical displacements in one of its supports

Torres

Bertolesi

Calderón

et al. 2019

Engineering Structures

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“…Li et al [ 15 ] developed an encapsulate method of FBG with basalt fiber-reinforced polymer, where the basic idea is to utilize two types of materials with different stiffness levels to package the in-tube optical fiber in order to impose the deformation within the gauge length largely on the short-gauge sensing part of FBG. Górriz et al [ 20 ] presented a new long-gauge sensor for structural health monitoring based on the use of fiber Bragg gratings, whose principal novelty and advantage is that it does not require the prestressing of the optical fiber in order to function correctly. Yang et al [ 21 ] performed a thorough analysis of the performance of different strain magnification structures with FBG.…”

Section: Introductionmentioning

confidence: 99%

Study of a Long-Gauge FBG Strain Sensor with Enhanced Sensitivity and Its Application in Structural Monitoring

Yang

Yang³

2021

Sensors

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A long-gauge fiber Bragg grating (FBG) strain sensor with enhanced strain sensitivity is proposed, which is encapsulated with two T-shaped metal blocks. Its fabrication method is described briefly, and the strain sensitivity can be flexibly adjusted through changing its packaging method. A series of experiments are carried out to study the packaging and its sensing properties. The experimental results show that the strain and temperature sensitivity coefficient of the sensor are three times larger than the common FBG sensors. The linearity coefficients of the FBG sensor are larger than 0.999, and the relative error of the repeatability of all sensor samples is less than 1%. Through the stability test on the actual bridge, it is revealed that the long-term stability of the sensor is excellent, and the maximum error is less than 1.5%. In addition, the proposed FBG strain sensors are used to conduct a shear strengthening experiment on a reinforced concrete (RC) beam to verify its working performance. The experimental results show that the strain change and crack propagation of the RC beam are well monitored by the sensors during the loading process.

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“…[9][10][11][12] Structural health monitoring (SHM) based on FBG sensing technology is potentially an effective method to assess the integrity of a given structure, increase operational lifetime and reduce maintenance cost. [13][14][15] For example, FBG sensors have been embedded in aircraft composite structures to monitor the vital locations of damages. 16,17 In recent years, condition monitoring of wind turbine using FBG sensor technology has been significantly investigated.…”

Section: Introductionmentioning

confidence: 99%

Dynamic strain measurement of hydraulic system pipeline using fibre Bragg grating sensors

Wang

Huang

Liu

et al. 2016

Advances in Mechanical Engineering

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Fatigue failure is a serious problem in hydraulic piping systems installed in the machinery and equipment working in harsh operational conditions. To alleviate this problem, health monitoring of pipes can be conducted by measuring and analysing vibration-induced strain. Fibre Bragg grating is considered as a promising sensing approach for dynamic load monitoring. In this article, dynamic strain measurements based on fibre Bragg grating sensors for small-bore metal pipes have been investigated. The quasi-distributed strain sensing of fibre Bragg grating sensors is introduced. Two comparison experiments were carried out under vibration and impact loads among the methods of electrical strain gauge, piezoelectric accelerometer and fibre Bragg grating sensor. Experimental results indicate that fibre Bragg grating sensor possesses an outstanding ability to resist electromagnetic interference compared with strain gauge. The natural frequency measurement results, captured by fibre Bragg grating sensor, agree well with the modal analysis results obtained from finite element analysis. In addition, the attached fibre Bragg grating sensor brings a smaller impact on the dynamic characteristics of the measured pipe than the accelerometer due to its small size and lightweight. Fibre Bragg grating sensors have great potential for the quasi-distributed measurement of dynamic strain for the dynamic characteristic research and health monitoring of hydraulic system pipeline.

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Experimental and numerical analysis of a hybrid FBG long gauge sensor for structural health monitoring

Cited by 9 publications

References 18 publications

A full-scale timbrel cross vault subjected to vertical cyclical displacements in one of its supports

A full-scale timbrel cross vault subjected to vertical cyclical displacements in one of its supports

Study of a Long-Gauge FBG Strain Sensor with Enhanced Sensitivity and Its Application in Structural Monitoring

Dynamic strain measurement of hydraulic system pipeline using fibre Bragg grating sensors

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