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Distributed sensors for damage detection and localization
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Structural Design and Bridges (name changed 20110630).
2009 (English)In: 4th International Conference on Structural Health Monitoring on Intelligent Infrastructure (SHMII-4), 2009Conference paper, Published paper (Refereed)
Abstract [en]

Distributed fiber optic sensing technology based on Brillouin scattering effect hasbeen proven as a mean to assess average strain and average temperature distributions instructures. However, detection of damage such as crack is very challenging, since only a shortportion of sensor, much shorter than spatial resolution of the system, is exposed to very highconcentrated strain. Beside this, the sensing fiber itself suffers from concentrated stresses andmay be broken. In order to resolve above mentioned issues, first the detection algorithm wasimproved in order to make system sensitive to measurand changes occurring over length shorterthan spatial resolution, and second a special manner of sensor installation is developed in orderto make possible for optical fiber to survive high concentrated stresses. The system is applied onGota Bridge, Gothenburg, Sweden, for the first time at a large scale. Number of reduced and fullscale tests were performed in order to assess performance of the system. The system, itsimplementation method and results of the tests are presented in this paper.

Place, publisher, year, edition, pages
2009.
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-78714Scopus ID: 2-s2.0-84896894246OAI: oai:DiVA.org:kth-78714DiVA: diva2:492792
Conference
4th International Conference on Structural Health Monitoring on Intelligent Infrastructure (SHMII-4). Zurich, Switzerland. 22-24 July 2009
Note
QC 20120502Available from: 2012-02-08 Created: 2012-02-08 Last updated: 2012-05-02Bibliographically approved

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