Abstract
Foundation piles that include geothermal liquid pipes are called “energy piles” and experience significant temperature changes during ground-source heat-pump operations. These temperature changes may affect the bearing capacity of the piles and lead to excessive displacements. Quantifying these effects is still a challenge for ensuring their long-term safety and stability. Several computational methods have been developed to model and predict the thermo-mechanical (TM) response of energy piles. Amongst them, the TM load-transfer (LT) approach assumes a steady-state thermal response and it has been proved to reproduce the observed field behaviour of energy pile tests to a certain extent. A more elaborate approach is the transient coupled TM solid finite element (SFE) analysis which is able to consider more features of the complicated soil-structure interaction problem, such as transient heat propagation, thermal expansion etc. This study presents the effects due to a transient temperature application with different time durations, by adopting the SFE approach. The transient heat propagation consequent to diverse thermal loading scenarios brings to more realistic results with respect to the LT steady-state thermal analysis. Therefore, the outcomes of this study are directly relevant to industry and practising engineers that need practical analysis tools for energy pile design.
Translated title of the contribution | Transient thermo-mechanical axisymmetric finite element analysis of energy piles |
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Original language | French |
Title of host publication | 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings |
Editors | Haraldur Sigursteinsson, Sigurour Erlingsson, Sigurour Erlingsson, Bjarni Bessason |
Publisher | International Society for Soil Mechanics and Geotechnical Engineering |
ISBN (Electronic) | 9789935943613 |
DOIs | |
Publication status | Published - 31 Dec 2019 |
Event | 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Reykjavik, Iceland Duration: 1 Sept 2019 → 6 Sept 2019 |
Publication series
Name | 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings |
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Volume | 2019-September |
Conference
Conference | 17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 |
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Country/Territory | Iceland |
City | Reykjavik |
Period | 1/09/19 → 6/09/19 |
Bibliographical note
Funding Information:This work forms part of the PhD work of the first Author at the University of Bath, which is funded through a EPSRC dCarb CDT studentship. Their contribution is greatly acknowledged.
Publisher Copyright:
© The authors and IGS: All rights reserved, 2019
Funding
This work forms part of the PhD work of the first Author at the University of Bath, which is funded through a EPSRC dCarb CDT studentship. Their contribution is greatly acknowledged.
Keywords
- Energy
- Energy piles
- Finite elements
- Soil-structure interaction
- Transient thermo-mechanical analysis
ASJC Scopus subject areas
- Soil Science
- Geotechnical Engineering and Engineering Geology