Sage Journals: Discover world-class research

Abstract

The essence of structural health monitoring (SHM) requires an innovative sensing system similar to a human nervous system throughout the whole body to catch comprehensive information without losing structural integrity. In a recent research by the authors, an integrated structural assessment strategy based on distributed strain sensing technologies is proposed [1], which has been dedicated to utilize the strain distribution throughout the full or some partial areas of structures to detect the arbitrary and unforeseen damage. To implement such strategy, a typical distributed fiber optic sensing system is developed by extending the gage length of fiber Bragg grating (FBG) and then arranging the long-gage FBG sensors in series. This article summarizes the packaging design and manufacture method of such long-gage FBG sensors and verifies the performance of the developed sensors and the distributed sensing system by using a series connection of long-gage FBG sensors. Combined with the practical application in steel and reinforced concrete (RC) structures, the efficiency and ascendancy of the proposed distributed fiber optic sensing system in SHM are elaborated.

Keywords

distributed sensing long-gage fiber optic sensor damage identification structural performance verification

Get full access to this article

View all access options for this article.

References

Wu, Z. and Li, S. 2005. Structural damage detection based on smart and distributed sensing technologies (Keynote). In: Proc. of the 2nd International Conference on Structural Health Monitoring and Intelligent Infrastructure , Shenzhen, China, pp. 107—120.

Schulz, W.L. , Conte, J.P. , Udd, E. and Kunzler, M. 2002. Real-time damage assessment of civil structures using fiber grating sensors and modal analysis. In: Smart Structures and Materials, San Diego, 2002. 4696—28.

Tang, L.Q. , et al. 2003. Internal health monitoring of pre-stress beams of a bridge by FBGs. In: Proc. of the First Structural Health Monitoring and Intelligent Infrastructure, pp. 315—319, Tokyo, Japan.

Ansari, F. 2003. Fiber optic health monitoring of civil structures . In: Proceedings of the First Structural Health Monitoring and Intelligent Infrastructure, pp. 19—30, Tokyo, Japan.

Conte, J.P. , Liu, M. and Inaudi, D. 2000. Earthquake response monitoring and damage identification of structures using long-gage fiber optic sensors. In: 14th ASCE Engineering Mechanics Division Conference, University of Texas, Austin, USA.

Inaudi, D. and Casanova, N. 2000. Geo-structural monitoring with long-gage interferometric sensors. In: SPIE, 7th International Symposium on Smart Structures and Materials, Newport Beach, USA, Vol. 3995, p. 164—174.

Glisic, B. and Inaudi, D. 2003. Integration of long-gage fiber-optic sensor into a fiber-reinforced composite sensing tape. In: SPIE, Symposium on Smart Structures and Materials, San Diego, USA, Vol. 5050.

Development of Distributed Long-gage Fiber Optic Sensing System for Structural Health Monitoring

Abstract

Keywords

Get full access to this article

References