Feasibility study for vibration based structural health monitoring system for transmission line support structures

Research output: Chapter in Book/Report/Conference proceedingConference paper

Abstract

High voltage infrastructure using overhead transmission lines is a key component in the present day supply chain of
energy. With developments of new transmission lines being limited and growing energy demands, it is essential to use the existing
infrastructure with minimal downtime. Condition-based structural maintenance of these structures could potentially help to reach
this target. However, with the majority of the structures over the age of 50 years old and a large number of structures of different
design there is no simple one-fits-all solution. For example, for a small and densely populated country such as Belgium (11Mio
residents), already over 20.000 structures are installed with over 4000 different designs, the majority of which are lattice structures.
In this study the feasibility for a structural health monitoring system for the support structures of overhead power lines is studied.
With the support of the Belgian high voltage grid operator Elia a single support structure is instrumented with an array of optical
strain gauges (FBGs), accelerometers and environmental sensors. In particular the structure is one of the largest masts ever built
in Belgium, connecting both banks of the Scheldt river in the port city of Antwerp. The setup is primarily intended to validate
the design assumptions, but it will be simultaneously used to study the feasibility of a vibration based structural health monitoring
system. In particular we will investigate the spectral content of both the optical strain gauges and the accelerometers under a
variety of loading conditions to investigate that both global modes and local dynamics are well captured. Data over a longer period
will be processed, including the use of automated operational modal analysis, to evaluate the presence of environmental effects
and variations in the structure’s dynamics over time. The outcome of this analysis could be used as input in the design of a more
dedicated monitoring system.
Original languageEnglish
Title of host publicationProceedings of the 10th International Conference on Structural Health Monitoring of Intelligent Infrastructure (SHMII10)
Pages1207-1213
Number of pages7
Volume2021-June
Publication statusPublished - 2021
Event10th International
Conference
on Structural
Health Monitoring
of Intelligent
Infrastructure
- FEUP, Porto, Portugal
Duration: 30 Jun 20212 Jul 2021

Publication series

NameInternational Conference on Structural Health Monitoring of Intelligent Infrastructure: Transferring Research into Practice, SHMII

Conference

Conference10th International
Conference
on Structural
Health Monitoring
of Intelligent
Infrastructure
Abbreviated titleSHMII 10
CountryPortugal
CityPorto
Period30/06/212/07/21

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