CUED Publications database

Analysis of fiber-optic strain-monitoring data from a prestressed concrete bridge

Webb, GT and Vardanega, PJ and Hoult, NA and Fidler, PRA and Bennett, PJ and Middleton, CR (2017) Analysis of fiber-optic strain-monitoring data from a prestressed concrete bridge. Journal of Bridge Engineering, 22. ISSN 1084-0702

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Abstract

© 2017, American Society of Civil Engineers (ASCE). All rights reserved. This paper presents data from fiber-optic strain monitoring of the Nine Wells Bridge, which is a three-span, pretensioned, prestressed concrete beam-and-slab bridge located in Cambridgeshire in the United Kingdom. The original deployment at the site and the challenges associated with collecting distributed strain data using the Brillouin optical time domain reflectometry (BOTDR) technique are described. In particular, construction and deployment issues of fiber robustness and temperature effects are highlighted. The challenges of interpreting the collected data as well as the potential value of information that may be obtained are discussed. Challenges involved with relating measurements to the expected levels of prestress, including the effects due to debonding, creep, and shrinkage, are discussed and analyzed. This paper provides an opportunity to study whether two commonly used models for creep and shrinkage, adequately model data collected in field conditions.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div D > Structures
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:26
Last Modified: 17 Aug 2017 01:25
DOI: