|本期目录/Table of Contents|

[1]徐新丽,蒋刚,路宏伟,等.能源桩热-力半耦合弹性理论分析方法[J].南京工业大学学报(自然科学版),2019,41(01):121-128.[doi:10.3969/j.issn.1671-7627.2019.01.018]
 XU Xinli,JIANG Gang,LU Hongwei,et al.Elasticity theory of energy pile under thermal-mechanical semi-coupling[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2019,41(01):121-128.[doi:10.3969/j.issn.1671-7627.2019.01.018]
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能源桩热-力半耦合弹性理论分析方法()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
41
期数:
2019年01期
页码:
121-128
栏目:
出版日期:
2019-01-28

文章信息/Info

Title:
Elasticity theory of energy pile under thermal-mechanical semi-coupling
文章编号:
1671-7627(2019)01-0121-08
作者:
徐新丽1蒋刚1路宏伟2宋著1洪鑫3
1.南京工业大学 交通运输工程学院,江苏 南京 210009; .2南京工业大学 土木工程学院,江苏 南京 211800; 3.江苏中大建设集团有限公司,江苏 昆山 215300
Author(s):
XU Xinli1JIANG Gang1LU Hongwei2SONG Zhu1HONG Xin3
1.College of Transportation Science & Engineering,Nanjing Tech University,Nanjing 210009,China; 2.College of Civil Engineering,Nanjing Tech University,Nanjing 211800,China; 3.Jiangsu Zhongda Construction Group Co. Ltd.,Kunshan 215300,China
关键词:
能源桩 弹性理论 热-力半耦合 荷载传递 有限元
Keywords:
energy pile elastic theory thermal-mechanical semi-coupling load transfer finite element
分类号:
TU473
DOI:
10.3969/j.issn.1671-7627.2019.01.018
文献标志码:
A
摘要:
能源桩集地源热泵换热管路于建筑桩基内并实现浅层地热能的利用,是受热-力耦合作用的新型桩基技术,但现有的理论分析方法未能全面揭示温度-荷载耦合对能源桩承载性状的影响。基于摩擦型单桩弹性有限元模型,本文将桩身温度变化引起的附加温度应力简化为桩身内力,并叠加桩顶荷载作用的轴向应力开展桩单元受力平衡分析,结合桩顶约束条件,建立了能源桩热-力半耦合弹性有限元模型。通过对比能源桩现场实测数据和已有的能源桩理论分析结果表明:本文能源桩弹性理论方法能较好地反映热-力半耦合作用下能源桩的承载性能和荷载传递规律。
Abstract:
Energy pile is a new pile technology which uses building pile foundation to realize the development and utilization of shallow geothermal energy.The heat exchanger pipes of the ground source heat pump are placed within the building pile foundation.However,theoretical methods fail to fully reveal the impact of thermal change on the bearing behavior of energy pile.Based on the elastic finite element model,a new method for assessing the main effects of temperature changes on one single floating pile behavior was proposed.The analysis of force equilibrium of pile element was carried out through the superposition of the thermal load which had been regarded as the internal force in the pile and normal stress which caused by the applying pile load.Combining with the constrained boundary conditions at the pile head,the elastic finite element model of energy pile under thermal-mechanical semi-coupling effect was established.Verification of the proposed method was undertaken by using the results of the field test and the existing theoretical method.The bearing behavior and load transfer characteristics in terms of the thermal-mechanical response of energy piles showed a better agreement with field test results.

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备注/Memo

备注/Memo:
收稿日期:2017-02-28
基金项目:江苏省六大人才高峰项目(2012-JZ-009); 江苏省建筑节能示范科技项目(2013SF01)
作者简介:徐新丽(1988—),女,E-mail:442604943@qq.com; 蒋刚(联系人),教授,E-mail:g.jiang@njtech.edu.cn.
引用本文:徐新丽,蒋刚,路宏伟,等.能源桩热-力半耦合弹性理论分析方法[J].南京工业大学学报(自然科学版),2019,41(1):121-128..
更新日期/Last Update: 2019-02-26