Analyse thermo-mécanique axisymétrique transitoire par éléments finis de pieux énergétiques

Translated title of the contribution: Transient thermo-mechanical axisymmetric finite element analysis of energy piles

F. A. Mevoli, L. Pelecanos, Y. Ouyang, K. Soga

Research output: Chapter or section in a book/report/conference proceedingChapter in a published conference proceeding

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 contributionTransient thermo-mechanical axisymmetric finite element analysis of energy piles
Original languageFrench
Title of host publication17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings
EditorsHaraldur Sigursteinsson, Sigurour Erlingsson, Sigurour Erlingsson, Bjarni Bessason
PublisherInternational Society for Soil Mechanics and Geotechnical Engineering
ISBN (Electronic)9789935943613
DOIs
Publication statusPublished - 31 Dec 2019
Event17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Reykjavik, Iceland
Duration: 1 Sep 20196 Sep 2019

Publication series

Name17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019 - Proceedings
Volume2019-September

Conference

Conference17th European Conference on Soil Mechanics and Geotechnical Engineering, ECSMGE 2019
Country/TerritoryIceland
CityReykjavik
Period1/09/196/09/19

Keywords

  • Energy
  • Energy piles
  • Finite elements
  • Soil-structure interaction
  • Transient thermo-mechanical analysis

ASJC Scopus subject areas

  • Soil Science
  • Geotechnical Engineering and Engineering Geology

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