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Embedded Crack Tip Opening Displacement Sensor for Concrete

Zhang, Zhijun / Ansari, Farhad

Abstract Development of a fiber optic sensor (FOS) for embedment in concrete is described. The sensor transduction mechanism is based on the measurement of the normalized intensity variation of the speckle pattern (SIV) generated at the output end of the optical fiber. The fiber optic sensors with different gauge lengths were calibrated with the cantilever beam test to determine the optimal combination of sensitivity and dynamic range of the sensing system. Fiber optic sensors were employed for measurement of the crack tip opening displacements (CTOD) in notched three-point bend concrete beams, and results are compared with the analytical prediction based on effective-elastic crack approach.

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Embedded Crack Tip Opening Displacement Sensor for Concrete

Zhang, Zhijun / Ansari, Farhad

Abstract Development of a fiber optic sensor (FOS) for embedment in concrete is described. The sensor transduction mechanism is based on the measurement of the normalized intensity variation of the speckle pattern (SIV) generated at the output end of the optical fiber. The fiber optic sensors with different gauge lengths were calibrated with the cantilever beam test to determine the optimal combination of sensitivity and dynamic range of the sensing system. Fiber optic sensors were employed for measurement of the crack tip opening displacements (CTOD) in notched three-point bend concrete beams, and results are compared with the analytical prediction based on effective-elastic crack approach.

Embedded Crack Tip Opening Displacement Sensor for Concrete

Zhang, Zhijun / Ansari, Farhad

Abstract Development of a fiber optic sensor (FOS) for embedment in concrete is described. The sensor transduction mechanism is based on the measurement of the normalized intensity variation of the speckle pattern (SIV) generated at the output end of the optical fiber. The fiber optic sensors with different gauge lengths were calibrated with the cantilever beam test to determine the optimal combination of sensitivity and dynamic range of the sensing system. Fiber optic sensors were employed for measurement of the crack tip opening displacements (CTOD) in notched three-point bend concrete beams, and results are compared with the analytical prediction based on effective-elastic crack approach.

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Title:

Embedded Crack Tip Opening Displacement Sensor for Concrete

Contributors:

Zhang, Zhijun (author) / Ansari, Farhad (author)

Published in:

Sensing Issues in Civil Structural Health Monitoring ; 453-462

Publication date:

2005-01-01

Size:

10 pages

ISBN:

978-1-4020-3660-6 , 978-1-4020-3661-3

DOI:

https://doi.org/10.1007/1-4020-3661-2_45

Type of media:

Article/Chapter (Book)

Type of material:

Electronic Resource

Language:

English

Keywords:

Fiber Optic Sensors , CTOD , CMOD , Concrete Engineering , Civil Engineering , Building Construction , Measurement Science and Instrumentation , Vibration, Dynamical Systems, Control , Building Materials , Building Repair and Maintenance

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