A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Embedded white light interferometer fibre optic strain sensor for monitoring crack-tip opening in concrete beams
The development of a fibre optic sensor for embedding in cementitious composites and the measurement of displacements associated with the opening of microcracks are described. The sensor can be employed as a transducer for the measurement of crack-tip opening displacements during fracture tests. A white light fibre optic interferometer was used to sense strain in a fibre embedded in a specimen concrete beam. A direct relationship between the fibre deformation and the optical path variation of the fibre sensor has been obtained. A calibration procedure was developed by which the optical signals were converted into displacments. The sensor was employed in a series of fracture tests and the experiments involved embedment of the optical fibre in concrete beams. Specimens were centre-edge-notched and the fibre optic sensor of the gauge length L was embedded at the tip of the notch. This arrangement allowed for the direct measurement of displacements associated with the opening of microcracks at the crack tip. Experimental results are presented and crack-tip opening displacement (CTOD) results are compared with crack-opening displacements (CODs) measured by conventional transducers at the crack mouth.
Embedded white light interferometer fibre optic strain sensor for monitoring crack-tip opening in concrete beams
The development of a fibre optic sensor for embedding in cementitious composites and the measurement of displacements associated with the opening of microcracks are described. The sensor can be employed as a transducer for the measurement of crack-tip opening displacements during fracture tests. A white light fibre optic interferometer was used to sense strain in a fibre embedded in a specimen concrete beam. A direct relationship between the fibre deformation and the optical path variation of the fibre sensor has been obtained. A calibration procedure was developed by which the optical signals were converted into displacments. The sensor was employed in a series of fracture tests and the experiments involved embedment of the optical fibre in concrete beams. Specimens were centre-edge-notched and the fibre optic sensor of the gauge length L was embedded at the tip of the notch. This arrangement allowed for the direct measurement of displacements associated with the opening of microcracks at the crack tip. Experimental results are presented and crack-tip opening displacement (CTOD) results are compared with crack-opening displacements (CODs) measured by conventional transducers at the crack mouth.
Embedded white light interferometer fibre optic strain sensor for monitoring crack-tip opening in concrete beams
Faseroptischer Embedded-Dehnungssensor mit Weißlichtinterferometer
Yuan, L. (author) / Ansari, F. (author)
Measurement Science and Technology ; 9 ; 261-266
1998
6 Seiten, 10 Bilder, 8 Quellen
Article (Journal)
English
Embedded Crack Tip Opening Displacement Sensor for Concrete
| British Library Conference Proceedings | 2005
Embedded Crack Tip Opening Displacement Sensor for Concrete
| Springer Verlag | 2005
Fiber-optic crack-tip opening displacement sensor for concrete
| Online Contents | 1997
A Fiber Optic Embedded Crack Opening Displacement Sensor for Cementitiuos Composites
| British Library Conference Proceedings | 1996
Embedded Fiber Optic Crack Sensor for Reinforced Concrete Structures
| Online Contents | 2000