Preliminary study on the mechanical behaviour of heat exchanger pile in physical model / A. Kalantidou in Géotechnique, Vol. 62 N° 11 (Novembre 2012)  

Public ISBD [article]  inGéotechnique > Vol. 62 N° 11 (Novembre 2012) . - pp. 1047 –1051 Titre : Preliminary study on the mechanical behaviour of heat exchanger pile in physical model Type de document : texte imprimé Auteurs : A. Kalantidou, Auteur ; A. M. Tang, Auteur ; J. M. Pereira, Auteur Année de publication : 2012 Article en page(s) : pp. 1047 –1051 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Settlement Soil/structure interaction Temperature effects Model tests Résumé : The effects of temperature changes on the mechanical behaviour of heat exchanger piles need to be taken into account in geotechnical design. In this preliminary study, the behaviour of an axially loaded pile under thermal cycles was investigated using a physical model. After applying the axial load on the pile head, the pile was heated from 25°C to 50°C and subsequently cooled to 25°C. Four tests (corresponding to four values of axial load) were performed and two temperature cycles were undertaken in each test. The pile temperature and the pile head displacement were monitored. When low axial loads were applied, the heating induced heave and cooling induced settlement of the pile head. In this case, the displacement–temperature curve was found to be reversible and similar to the thermal expansion curve of the pile. However, in the case of higher axial loads, the heave of the pile head, obtained during heating, was lower than the thermal expansion of the pile, suggesting settlement of the pile toe. Irreversible settlement of the pile head was observed after these thermal cycles. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.11.T.013 [article] Preliminary study on the mechanical behaviour of heat exchanger pile in physical model [texte imprimé] / A. Kalantidou, Auteur ; A. M. Tang, Auteur ; J. M. Pereira, Auteur . - 2012 . - pp. 1047 –1051. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 62 N° 11 (Novembre 2012) . - pp. 1047 –1051 Mots-clés : Settlement Soil/structure interaction Temperature effects Model tests Résumé : The effects of temperature changes on the mechanical behaviour of heat exchanger piles need to be taken into account in geotechnical design. In this preliminary study, the behaviour of an axially loaded pile under thermal cycles was investigated using a physical model. After applying the axial load on the pile head, the pile was heated from 25°C to 50°C and subsequently cooled to 25°C. Four tests (corresponding to four values of axial load) were performed and two temperature cycles were undertaken in each test. The pile temperature and the pile head displacement were monitored. When low axial loads were applied, the heating induced heave and cooling induced settlement of the pile head. In this case, the displacement–temperature curve was found to be reversible and similar to the thermal expansion curve of the pile. However, in the case of higher axial loads, the heave of the pile head, obtained during heating, was lower than the thermal expansion of the pile, suggesting settlement of the pile toe. Irreversible settlement of the pile head was observed after these thermal cycles. ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.11.T.013

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