Imperial College London
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Dr David M. G. Taborda

Faculty of Engineering, Department of Civil and Environmental Engineering

Reader in Geomechanical Modelling
 
 
 
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Contact

 

+44 (0)20 7594 6033d.taborda Website

 
 
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Assistant

 

Ms Sue Feller +44 (0)20 7594 6077

 
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Location

 

432Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Liu:2020:10.1016/j.compgeo.2020.103743,
author = {Liu, R and Sailer, E and Taborda, D and Potts, D and Zdravkovic, L},
doi = {10.1016/j.compgeo.2020.103743},
journal = {Computers and Geotechnics},
pages = {1--16},
title = {A practical method for calculating thermally-induced stresses in pile foundations used as heat exchangers},
url = {http://dx.doi.org/10.1016/j.compgeo.2020.103743},
volume = {126},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Thermo-active piles are capable of providing both structural stability as foundations and low carbon heating and cooling as ground source heat exchangers. When subjected to heating or cooling, the soil surrounding the pile restricts its expansion or contraction, giving rise to thermally-induced axial stresses, which need to be considered during design. Previous numerical studies often assume axisymmetry of the problem and/or a simplification of the heating or cooling mechanism of the pile. To simulate accurately the development of thermallyinduced axial stresses, this paper presents a computational study comprising three dimensional fully coupled thermo-hydro-mechanical finite element analyses conducted using the Imperial College Finite Element Program (ICFEP), where the heating of a thermo-active pile is simulated by prescribing a flow of hot water through the heat exchanger pipes within the pile. The effects of pipe arrangement on thermally-induced axial stresses are investigated by considering three different cases – single U loop, double U-loop and triple U-loop. Since threedimensional analyses are computationally expensive, a simplified method using a combination of two-dimensional analyses is proposed to estimate the thermally-induced axial stresses, which is subsequently validated and shown to yield accurate results.
AU  - Liu,R
AU  - Sailer,E
AU  - Taborda,D
AU  - Potts,D
AU  - Zdravkovic,L
DO  - 10.1016/j.compgeo.2020.103743
EP  - 16
PY  - 2020///
SN  - 0266-352X
SP  - 1
TI  - A practical method for calculating thermally-induced stresses in pile foundations used as heat exchangers
T2  - Computers and Geotechnics
UR  - http://dx.doi.org/10.1016/j.compgeo.2020.103743
UR  - https://www.sciencedirect.com/science/article/pii/S0266352X20303062?via%3Dihub
UR  - http://hdl.handle.net/10044/1/80779
VL  - 126
ER  -
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