Journal
INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS
Volume 30, Issue 8, Pages 763-781Publisher
JOHN WILEY & SONS LTD
DOI: 10.1002/nag.499
Keywords
heat exchangers; finite elements; pile foundations; model verification
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The geothermal use of concrete geostructures (piles. walls and slabs) is an environmentally friendly way of cooling and heating buildings. With such geothermal structures. it is possible to transfer energy from the ground to fluid-filled pipes cast in concrete and then to building environments. To improve the knowledge in the field of geothermal structures. the behaviour of a pile subjected to thermo-mechanical loads is studied in situ. The aim is to study the increased loads on pile due to thermal effects. The maximum thermal increment applied to the pile is on the order of 21 degrees C and the mechanical load reached 1500 kN. Coupled multi-physical finite element modelling is carried out to simulate the observed experimental results. It is shown that the numerical model is able to reproduce the most significant thermo-mechanical effects. Copyright (C) 2006 John Wiley & Sons. Ltd.
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