The role of thermal loads in the performance-based design of energy piles

Alessandro F. Rotta Loria*, Matteo Bocco, Cristiano Garbellini, Aurelio Muttoni, Lyesse Laloui

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

Over the past two decades, a substantial amount of research has investigated the effects of thermal loads associated with the geothermal operation of energy piles on their mechanical response. Based on this research, consensus about the need for considering the effects of thermal loads on the geotechnical and structural design of energy piles has been achieved. However, the understanding of the influence of thermal loads on the mechanical response of energy piles has prevented the determination of when the effects of these loads should be considered in performance-based design, e.g., only when addressing the deformation (at serviceability limit states) or also the failure (at ultimate limit states) of such foundations. Looking at this challenge, this paper presents an investigation of the role of thermal loads in the mechanical response of energy piles to provide a theoretically based approach for the geotechnical and structural performance-based design of such foundations. The main conclusion that can be drawn from this study and the discussed ductility-based design approach is that thermal loads cause negligible effects at ultimate limit states from both a geotechnical and a structural perspective, while they cause significant effects that should be considered at serviceability limit states.

Original languageEnglish (US)
Article number100153
JournalGeomechanics for Energy and the Environment
Volume21
DOIs
StatePublished - Mar 2020

Keywords

  • Ductility
  • Energy piles
  • Performance-based design
  • Serviceability limit states
  • Thermal loads
  • Ultimate limit states

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Geotechnical Engineering and Engineering Geology
  • Computers in Earth Sciences

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