Investigation on packages of fiber Bragg grating for use as embeddable strain sensor in concrete structure

Biswas, Palas; Bandyopadhyay, Somnath; Kesavan, K.; Parivallal, S.; Sundaram, B. Arun; Ravisankar, K.; Dasgupta, Kamal

doi:10.1016/j.sna.2009.10.020

Cited by 67 publications

(38 citation statements)

References 16 publications

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“…Various packaging techniques [6][7][8][9] for FBG strain sensors have been proposed to meet the requirements of different applications, as shown in Fig. They are usually packaged into FBG strain sensors before installation.…”

Section: Strain Transfer Models Of Fbg Strain Sensorsmentioning

confidence: 99%

Degradation of sensing properties of fiber Bragg grating strain sensors in fatigue process of bonding layers

et al. 2014

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Bonding layers, serving as the strain transmission mediums, may bring undesirable effects to the sensing properties of fiber Bragg grating (FBG) strain sensors during their fatigue process. To analyze the strain sensitivity and the reflected spectrum of FBG strain sensors in different fatigue stages of bonding layers, their strain sensitivities were derived according to strain transfer models. Resorting to T-matrix formalism, the affected reflected spectra were stimulated. Theoretical analysis results show that there is a gradual decline in the strain sensitivity during the stage of fatigue crack initiation, and that significant distortions emerge in the reflected spectrum during the stage of fatigue crack propagation. In addition, a cyclic loading fatigue test was conducted and the phenomenon observed in the test showed a good agreement with the theoretical prediction. Zhang et al.: Degradation of sensing properties of fiber Bragg grating strain sensors. . . Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 05/14/2015 Terms of Use: http://spiedl.org/terms

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Section: Strain Transfer Models Of Fbg Strain Sensorsmentioning

confidence: 99%

Degradation of sensing properties of fiber Bragg grating strain sensors in fatigue process of bonding layers

et al. 2014

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“…Finally a few limitations and market barriers associated with the use of these sensors have been addressed. Biswas et al 19 had investigated on encapsulation of FBG sensors fot strain sensing of concrete structures in embeddable form. Successfully packaged sensors with efficient strain transfer had been embedded in a concrete structure and responses under static and dynamic loadings were compared with EFPI FOS.…”

Section: Sensors For Structural Health Monitoring (Shm) Of Undergrounmentioning

confidence: 99%

Stability and reliability of fiber optic measurement systems: basic conditions for successful long term structural health monitoring

2011

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Recent developments in fiber optic sensors for monitoring civil structures have been of great help for engineers dealing with these structures. After literature survey it is observed that while using fiber optic sensor system for health monitoring of civil structures not much attention is given to the core quality of the fiber, types of coating on fiber, implementing methodologies, handling of fiber optic sensors and their long term effect on reliability of the performance of the monitoring system. These issues are important because the structural conditions, stress level and environment in which fiber optic sensors are placed are different from telecommunication industry. In this paper issues related to long term structural health monitoring of civil structures are investigated. The issue of the fatigue property of optic fiber is discussed since reversal bending of the fiber may cause adverse effect on the light carrying capacity of the fiber. Other long term structural health monitoring (SHM) issues such as life of fiber, strain transfer process from fiber core to coating, calibration of fiber and selection of fiber are also discussed based on the experiments carried out for successful implementation of long term health monitoring of civil structures. The main objective of these experiments is to come up with comprehensive long term structural health monitoring system for strain measurement.

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“…Long-term monitoring of a concrete bridge by using many types of Fibre Optic (FO) sensors has been proposed in some reports in the literature. Fibre Bragg Grating (FBG) sensors bonded at the surface or integrated into concrete with stainless steel or epoxy resin encapsulation techniques were used in [12]. Moreover, proof ABS enclosures were used for the Tsing Ma Bridge to protect the FBG sensors from moisture and dust [13].…”

Section: Introduction Q1mentioning

confidence: 99%

Advances of FRP-based smart components and structures

Chan

Zhou

2014

Pacific Science Review

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Fibre-Reinforced Polymer (FRP) composites have been widely used in civil engineering for the past two decades. This paper presents an overview of the smart components and structures based on FRP. The basic principles of intelligent structures made of FRP and Optical fibre sensors are introduced. Some significant up-to-date smart elements used as reinforcing and health monitoring structures are also described in detail. Moreover, certain applications of smart FRP systems in civil engineering are briefly mentioned. Smart bars based on FRP are found to be very useful and could replace conventional steel. In addition, FRP-OF-OFBG is one of the most advanced techniques for local and global monitoring. However, interface strain for externally reinforcing systems requires specific characteristics to overcome debonding effects. Finally, analysis of the problems of existing applications based on carbon fibre composites are highlighted, followed by a description of some possibilities of new designs of smart FRPs.

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Investigation on packages of fiber Bragg grating for use as embeddable strain sensor in concrete structure

Cited by 67 publications

References 16 publications

Degradation of sensing properties of fiber Bragg grating strain sensors in fatigue process of bonding layers

Degradation of sensing properties of fiber Bragg grating strain sensors in fatigue process of bonding layers

Stability and reliability of fiber optic measurement systems: basic conditions for successful long term structural health monitoring

Advances of FRP-based smart components and structures

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