Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model

Energy piles are an emerging energy technology for both structural and thermal purposes. To support structure load, piles are always used in groups with raft; however, the cost and complexity of field tests and numerical modelling limits the research on the bearing characteristics of energy pile gro...

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Autores principales:	Lichen Li, Longlong Dong, Chunhua Lu, Wenbing Wu, Minjie Wen, Rongzhu Liang
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	energy pile group thermo-mechanical loading exponential model load transfer method group effect Technology T
Acceso en línea:	https://doaj.org/article/c3703e7c50ca40faa13affd354733419
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spelling	oai:doaj.org-article:c3703e7c50ca40faa13affd3547334192021-11-11T15:43:49ZAnalysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model10.3390/en142168811996-1073https://doaj.org/article/c3703e7c50ca40faa13affd3547334192021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/6881https://doaj.org/toc/1996-1073Energy piles are an emerging energy technology for both structural and thermal purposes. To support structure load, piles are always used in groups with raft; however, the cost and complexity of field tests and numerical modelling limits the research on the bearing characteristics of energy pile group. In this paper, exponential model was applied to simulate the thermo-mechanical soil-pile interaction of energy pile group. Axial load transfer (<i>τ</i>-<i>z</i>) analysis was first performed to calculate the shear stress distribution in the soil, then matrix displacement method was introduced to determine the thermo-mechanical response of energy pile group. The validity of the analytical model was tested against field tests and numerical results. A case study was further performed to analyze the influence of thermal cycles and arrangement of thermally active piles on the bearing response of the whole pile group. Test results show that with the thermally activated pile in pile group, (1) differential settlement increases with thermal cycle numbers; (2) the axial force of thermally active pile increases during heating process and decreases during cooling process, and this trend varies for the surrounding nonthermal piles; (3) induced load on thermal pile increases with thermal cycles, but decreases for nonthermal piles. The proposed analytical model is expected to serve as a simple and convenient alternative for the preliminary analysis on the bearing characteristics of energy group pile.Lichen LiLonglong DongChunhua LuWenbing WuMinjie WenRongzhu LiangMDPI AGarticleenergy pile groupthermo-mechanical loadingexponential modelload transfer methodgroup effectTechnologyTENEnergies, Vol 14, Iss 6881, p 6881 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	energy pile group thermo-mechanical loading exponential model load transfer method group effect Technology T
spellingShingle	energy pile group thermo-mechanical loading exponential model load transfer method group effect Technology T Lichen Li Longlong Dong Chunhua Lu Wenbing Wu Minjie Wen Rongzhu Liang Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model
description	Energy piles are an emerging energy technology for both structural and thermal purposes. To support structure load, piles are always used in groups with raft; however, the cost and complexity of field tests and numerical modelling limits the research on the bearing characteristics of energy pile group. In this paper, exponential model was applied to simulate the thermo-mechanical soil-pile interaction of energy pile group. Axial load transfer (<i>τ</i>-<i>z</i>) analysis was first performed to calculate the shear stress distribution in the soil, then matrix displacement method was introduced to determine the thermo-mechanical response of energy pile group. The validity of the analytical model was tested against field tests and numerical results. A case study was further performed to analyze the influence of thermal cycles and arrangement of thermally active piles on the bearing response of the whole pile group. Test results show that with the thermally activated pile in pile group, (1) differential settlement increases with thermal cycle numbers; (2) the axial force of thermally active pile increases during heating process and decreases during cooling process, and this trend varies for the surrounding nonthermal piles; (3) induced load on thermal pile increases with thermal cycles, but decreases for nonthermal piles. The proposed analytical model is expected to serve as a simple and convenient alternative for the preliminary analysis on the bearing characteristics of energy group pile.
format	article
author	Lichen Li Longlong Dong Chunhua Lu Wenbing Wu Minjie Wen Rongzhu Liang
author_facet	Lichen Li Longlong Dong Chunhua Lu Wenbing Wu Minjie Wen Rongzhu Liang
author_sort	Lichen Li
title	Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model
title_short	Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model
title_full	Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model
title_fullStr	Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model
title_full_unstemmed	Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model
title_sort	analysis of bearing characteristics of energy pile group based on exponential model
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c3703e7c50ca40faa13affd354733419
work_keys_str_mv	AT lichenli analysisofbearingcharacteristicsofenergypilegroupbasedonexponentialmodel AT longlongdong analysisofbearingcharacteristicsofenergypilegroupbasedonexponentialmodel AT chunhualu analysisofbearingcharacteristicsofenergypilegroupbasedonexponentialmodel AT wenbingwu analysisofbearingcharacteristicsofenergypilegroupbasedonexponentialmodel AT minjiewen analysisofbearingcharacteristicsofenergypilegroupbasedonexponentialmodel AT rongzhuliang analysisofbearingcharacteristicsofenergypilegroupbasedonexponentialmodel
_version_	1718434114924707840

Analysis of Bearing Characteristics of Energy Pile Group Based on Exponential Model

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