Projects per year
Abstract
Cracks can occur in reinforced-concrete onshore wind turbine foundations due to factors such as the use of substandard concrete mix, mistakes in foundation design or multi-stage concrete pouring under challenging weather conditions. Cracks are routinely identified via above ground inspections and follow-on examination of excavated underground surfaces and are repaired, for example with resin injection and grouting. Their impact on the structure or the efficacy of the repair are often unknown as crack degradation during normal operating conditions is unexplored. In this work, sub-surface cracks in an onshore wind turbine foundation have been instrumented with fibre-optic based strain sensors in an attempt to determine severity and magnitude of deterioration over time. Here we determine cracks monitored show a small magnitude of deterioration over the initial 9-month period after sensor installation, suggesting that repair is not required. We propose a novel methodology for the classification of the types of deterioration evident in cracks as “reactive”, “permanent” and “behavioural”, and demonstrate methods to extract these types of deterioration. Such methods will continually be developed over time as further knowledge of crack behaviour is gained to determine appropriate limits and identify the optimal time to repair.
Original language | English |
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Pages (from-to) | 121-131 |
Number of pages | 11 |
Journal | Engineering Structures |
Volume | 167 |
Early online date | 12 May 2018 |
DOIs | |
Publication status | Published - 15 Jul 2018 |
Keywords
- cracks
- foundations
- degradation
- fibre optic
- strain
- deterioration
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Dive into the research topics of 'Deterioration of cracks in onshore wind turbine foundations'. Together they form a unique fingerprint.Profiles
Projects
- 1 Finished
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Doctoral training centre in wind energy systems
Leithead, B. (Principal Investigator) & Infield, D. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/10/09 → 31/03/18
Project: Research - Studentship
Datasets
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Data for: "Deterioration of cracks in onshore wind turbine foundations"
McAlorum, J. (Creator), University of Strathclyde, 15 Nov 2018
DOI: 10.15129/6d1ad9e3-b78d-4d55-bfc0-d958abbb94ab
Dataset