Monitoring the stress of the post-tensioning cable using fiber optic distributed strain sensor

Gao, Junqi; Shi, Bin; Zhang, Wei; Zhu, Hong

doi:10.1016/j.measurement.2005.12.002

Cited by 43 publications

(24 citation statements)

References 9 publications

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“…Compared to other FOS technologies, the main drawback of Brillouin sensors is their limited strain accuracy, which is of the order of 30 µε for BOTDR [24] and 10 µε for BOTDA [23] with current interrogation technologies. These features still make BOTDR/BOTDA systems suitable for inexpensive distributed monitoring of large scale structures, at least in those cases where strain accuracy and exact damage location are not critical issues: the scientific literature reports successful applications to piles, pipes, tunnels, levees, dams, steel structures, and steel cables [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Development and laboratory validation of in-line multiplexed low-coherence interferometric sensors

Pozzi

Zonta

et al. 2008

Optical Fiber Technology

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Section: Introductionmentioning

confidence: 99%

Development and laboratory validation of in-line multiplexed low-coherence interferometric sensors

Pozzi

Zonta

et al. 2008

Optical Fiber Technology

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“…The DOFS can be bonded to the post-tensioning cable later on installed in the concrete beams. The BOTDR can be used to measure the stress distribution in a post-tensioning cable and the prestessing loss in the post-tensioning cable after several years can also be calculated (Gao et al 2006). Nowadays, there are BOTDA experimental works using integrated optical fiber sensor inside the prestressing steel cables as shown in Fig.…”

Section: Monitoring the Stress Of Post-tensioning Cablesmentioning

confidence: 99%

SHM by DOFS in civil engineering: a review

Rodríguez¹,

Casas²,

Villalba³

2015

Structural Monitoring and Maintenance

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Abstract. This paper provides an overview of the use of different Distributed Optical Fiber Sensor systems (DOFSs) to perform Structural Health Monitoring (SHM) in the specific case of civil engineering structures. Nowadays, there are several methods available for extracting distributed measurements from optical fiber, and their use have to be according with the aims of the SHM performance. The continuous-in-space data is the common advantage of the different DOFSs over other conventional health monitoring systems and, depending on the particular characteristics of each DOFS, a global and/or local health structural evaluation is possible with different accuracy. Firstly, the fundamentals of different DOFSs and their principal advantages and disadvantages are presented. Then, laboratory and field tests using different DOFSs systems to measure strain in structural elements and civil structures are presented and discussed. Finally, based on the current applications, conclusions and future trends of DOFSs in SHM in civil structures are proposed.

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“…In this paper, based on the feasible full-scale prestressed monitoring method and technology, the working state of new sensors is investigated by the series of externally prestressed concrete beams with the new series of optical fiber sensor [10][11][12] and traditional sensors. The evolution law of the whole life prestress loss of prestressed concrete beams under static load is obtained by the proposed monitoring system, and the data is supported for the safety evaluation of prestressed concrete beams.…”

Section: Introductionmentioning

confidence: 99%

Experiment of the Monitoring the Life-cycle External Prestressed Members Under Static Loading

Lan¹,

Liguang²,

Zhiyu³

et al. 2018

dtetr

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In this paper, based on the feasible method and technique for full-scale prestressed monitor, the novel optical fiber sensors and the traditional monitoring sensors will be set up into two prestressed concrete beams with same geometrical and physical conditions to investigate the working state of the new sensors and obtain the prestress evolution of the external prestressed feature component under the static load. the results show that the prestressing evolution of loaded beam under the condition of no damage state and initial crack is same as the non loaded one, however the prestressing loss increases with the time under the condition with the limit crack. The prestressing loss of prestressed beam with the limit crack is 36.4% of the total loss. The prestressing loss of the external prestressed member under the static load increases with the development of the crack (damage).

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Monitoring the stress of the post-tensioning cable using fiber optic distributed strain sensor

Cited by 43 publications

References 9 publications

Development and laboratory validation of in-line multiplexed low-coherence interferometric sensors

Development and laboratory validation of in-line multiplexed low-coherence interferometric sensors

SHM by DOFS in civil engineering: a review

Experiment of the Monitoring the Life-cycle External Prestressed Members Under Static Loading

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