Monitoring an in-service railway bridge with a distributed fiber optic strain sensing system
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Authors
Van Der Kooi, Kyle
Hoult, Neil A.
Le, Hoat
Date
2018-07-19
Type
journal article
Language
en
Keyword
Field tests , Railways , Truss bridge , Steel , Strain distribution
Alternative Title
Abstract
Distributed fiber optic strain sensing systems could potentially provide a useful tool for bridge assessment by providing insights into member forces and connection behavior as well as local cross-section changes (e.g., due to deterioration) for steel truss bridges. To investigate the use of distributed fiber optic strain sensing systems, an in-service steel truss bridge that was built in 1902 had a fiber optic sensing system installed at midspan at the top and bottom chord connections. Three load scenarios were used: (a) static loading using a work train, (b) dynamic loading using a work train, and (c) dynamic loading using in-service increasing trains. The static test results indicated that the strains could be used to evaluate behavior in the members, including the presence of bending moments, and the impact of connections such as gusset plates and to locate changes in the member’s cross section. The dynamic load tests indicated that increasing train speed degrades the quality of the strain measurements. However, trends in the data can still be detected and are similar to those observed during static tests, although the detection of localized strain changes was less accurate.
Description
This is the accepted manuscript of Van Der Kooi, K., Hoult, N. A., & Le, H. (2018). Monitoring an in-service railway bridge with a distributed fiber optic strain sensing system. Journal of Bridge Engineering, 23(10), 05018007.. The publisher's version is available at https://doi.org/10.1061/(ASCE)BE.1943-5592.0001281.
Citation
Van Der Kooi, K., Hoult, N. A., & Le, H. (2018). Monitoring an in-service railway bridge with a distributed fiber optic strain sensing system. Journal of Bridge Engineering, 23(10), 05018007,
Publisher
American Society of Civil Engineers