Application of optical fiber distributed sensing to health monitoring of concrete structures

Villalba, Sergi; Casas, Joan R.

doi:10.1016/j.ymssp.2012.01.027

Cited by 144 publications

(94 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…18C over a 10 mm gauge length (Kreger et al, 2007) along up to 70 m of fibre. The system has been used to measure strains on a reinforced concrete slab in the tension and compression regions by Güemes et al (2010) and Villalba and Casas (2012) using externally bonded fibres, but not to detect internal deterioration. Regier and Hoult (2014) used the system to measure concrete surface strains during a load test on a reinforced concrete bridge.…”

Section: Fibre Optic Sensingmentioning

confidence: 99%

Concrete deterioration detection using distributed sensors

Regier

Hoult

2015

Proceedings of the Institution of Civil Engineers - Structures

View full text Add to dashboard Cite

The potential for using a distributed fibre optic strain sensor system to detect and quantify localised reinforcement deterioration and explore the failure mechanism of reinforced concrete beams is investigated. The objective is to discover whether distributed fibre optic strain sensors installed either internally or externally can detect pitting corrosion in reinforced concrete beams, and be used to better understand structural behaviour. These sensors enable strain to be measured along the full length of the fibre optic cable, whereas conventional electrical resistance strain gauges offer discrete measurements that may not capture localised strain changes. Axial tension tests on reinforcement bars demonstrate that deterioration detection is possible, but that quantification of deterioration is not necessarily straightforward, depending on the extent of deterioration. Four-point bending tests on reinforced concrete beams illustrate that localised deterioration can be detected and quantified with embedded sensing fibres and that cracks can be detected using externally bonded fibres. The top and bottom reinforcement strain profiles are used to demonstrate that the unexpected ultimate failure loads of the beams are the result of specimens behaving as tied arches at failure. Overall the distributed fibre optic sensor system proves to be effective for detection and quantification of localised deterioration and provides the necessary data to assess the beam failure mechanism.

show abstract

Section: Fibre Optic Sensingmentioning

confidence: 99%

Concrete deterioration detection using distributed sensors

Regier

Hoult

2015

Proceedings of the Institution of Civil Engineers - Structures

View full text Add to dashboard Cite

show abstract

“…20, strain profiles measured in the optical fiber may differ from actual strain in the structure Wang 2003, Her andWang 2011). However, there are cases , Villalba and Casas 2013, Rodríguez et al 2014, that the strain transfer can be neglected because the sensor used in the test is a fiber with a simply polyimide-coated, without any spatial protective coating, also shown in Fig. 20.…”

Section: Strain Transfer Mechanism Between Dofs and The Host Materialsmentioning

confidence: 99%

“…Recently, with the same ODISi system used in reference by Casas et al 2015 andVillalba et al 2012, a method to obtain crack initiation, location and width in a concrete structure subject to bending was proposed (Rodríguez et al 2014, Rodríguez et al 2015. The method is based on the test results carried out on a concrete slab (Villalba 2010, Villalba 2011, Villalba et al 2013. Thanks to the millimetric spatial resolution of the system, a considerable number of spikes were observed in a distributed strain profile, indicating the detection of cracking even at low load levels as shown in Fig.…”

Section: Crack Detection In Concrete Elementsmentioning

confidence: 99%

SHM by DOFS in civil engineering: a review

Rodríguez¹,

Casas²,

Villalba³

2015

Structural Monitoring and Maintenance

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…The capability of OFDR technology in temperature monitoring has been tested successfully. Villalba et al [27] bonded optical fibers to the surface of a concrete slab. The OBR was then used to measure the strain of the concrete under load.…”

Section: Introductionmentioning

confidence: 99%

Experiment and Numerical Study on Deformation Measurement of Cast-in-Place Concrete Large-Diameter Pipe Pile Using Optical Frequency Domain Reflectometer Technology

et al. 2018

View full text Add to dashboard Cite

Abstract:The Cast-in-place concrete large-diameter pipe (PCC) pile has been used as the foundation reinforcement and embankment in China due to its low cost and high bearing capacity. The deformation of PCC pile under different vertical loads is very important for the application of engineering. In order to study the deformation characteristics of PCC pile, a small-scale model test was carried out. The new distributed measuring technology, named Optical Frequency Domain Reflectometer (OFDR), was applied to measure the strain on the PCC pile. A single mode fiber (SMF) was used, and the methods of layout, packaging and protection of optical fiber are introduced in detail. The obtained data was dealt with by wavelet transform, and the strain curves were analyzed based on the experiments. The finite element (FE) analysis model was established by COMSOL Multiphysics, and the numerical results compared with the experiment results. It showed that the optical fiber sensor can measure the strain of PCC pile, and that the deformation of PCC pile can be successfully obtained by OFDR technology. The strain of the pile decreases with depth and increases with loading. The measured result agrees well with numerical simulation result. The potential application of OFDR technology to PCC pile in situ and PCC energy pile is discussed.

show abstract

Application of optical fiber distributed sensing to health monitoring of concrete structures

Cited by 144 publications

References 5 publications

Concrete deterioration detection using distributed sensors

Concrete deterioration detection using distributed sensors

SHM by DOFS in civil engineering: a review

Experiment and Numerical Study on Deformation Measurement of Cast-in-Place Concrete Large-Diameter Pipe Pile Using Optical Frequency Domain Reflectometer Technology

Contact Info

Product

Resources

About