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Using Distributed Brillouin Fiber Sensor to Detect the Strain and Cracks of Steel Structures

Published online by Cambridge University Press:  03 October 2011

C.-H. Chen ,
Y.-L. Shen  and
C.-S. Shin
C.-H. Chen*
Affiliation:
Institute of Applied Mechanics, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
Y.-L. Shen*
Affiliation:
Institute of Applied Mechanics, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
C.-S. Shin*
Affiliation:
Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan 10617, R.O.C.
*
* Professor, Ph.D.
** Associate Researcher, Ph.D., corresponding author
*** Professor, Ph.D.
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Abstract

A distributed Brillouin fiber sensor was used to monitor the health of steel structures. We used this method on two steel beam specimens and longitudinal strain and cracks were detected well under different loads. The difference between the longitudinal strain measured by the distributed fiber sensor and that measured by strain gages is less than 4%. Traditional sensors or transducers that measure the average strain over a small region always miss cracks. The method proposed in this study gives very good results for the detection of cracks and the surrounding strain on a square pipe.

Keywords

Distributed fiber sensorHealth monitoring of steel structuresCrack detection
Type
Research Article
Information
Journal of Mechanics , Volume 26 , Issue 4 , December 2010 , pp. 547 - 551
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2010

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References

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