Analysis of Thermo-mechanical Behavior of Single Pile Influenced by Pile Tip Constraint

郝耀虎; 孔纲强; 彭怀风; 刘汉龙; 车平

doi:10.13409/j.cnki.jdpme.2017.04.004

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Analysis of Thermo-mechanical Behavior of Single Pile Influenced by Pile Tip Constraint

更新时间：2025-12-11

- Analysis of Thermo-mechanical Behavior of Single Pile Influenced by Pile Tip Constraint
- Vol. 37, Issue 4, Pages: 532-539(2017)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2017.04.004
  CLC： U473.1;TU83
- Published：2017
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[1]郝耀虎,孔纲强,彭怀风,刘汉龙,车平.桩端约束对桩身热力学特性影响的模拟分析[J].防灾减灾工程学报,2017,37(04):532-539.

郝耀虎, 孔纲强, 彭怀风, et al. Analysis of Thermo-mechanical Behavior of Single Pile Influenced by Pile Tip Constraint[J]. 2017, 37(4): 532-539.
[1]郝耀虎,孔纲强,彭怀风,刘汉龙,车平.桩端约束对桩身热力学特性影响的模拟分析[J].防灾减灾工程学报,2017,37(04):532-539. DOI： 10.13409/j.cnki.jdpme.2017.04.004.

郝耀虎, 孔纲强, 彭怀风, et al. Analysis of Thermo-mechanical Behavior of Single Pile Influenced by Pile Tip Constraint[J]. 2017, 37(4): 532-539. DOI： 10.13409/j.cnki.jdpme.2017.04.004.

摘要

能量桩是一种在传递上部建筑荷载的同时承担地热能源传热器作用的新技术。实际运行过程中

桩身温度发生变化导致桩体膨胀或收缩;桩周及桩端土体对桩身的自由膨胀约束作用

使桩体内会产生附加应力。基于模型试验和数值模拟方法

开展冷-热温度循环荷载作用下桩基在不同桩端约束条件下的桩身应力和位移特性研究。结果表明

温度荷载作用下桩体最大应力出现在桩身中部;加热阶段桩端约束对桩身应力分布影响比制冷时大;桩身位移变化规律受温度与桩端约束的共同影响

温度变化量增加

桩身上部位移变化量变大

下部位移受影响较小。

Abstract

Energy pile is an innovate technology

which can support the building load and acquire geothermal energy simultaneously. In the actual operation process

the temperature of pile body will change significantly

causing the expansion or contraction of the pile

and due to the constraint of pile end and soil around the pile

the pile will produce additional heat stress. Based on model test and numerical simulation methods

the heat stress and displacement of energy piles under cold-thermal cycling loading with different pile tip constraints are analyzed. The results show that the maximum stress of the pile is in the middle of the pile under the temperature load.In the heating stage the effect of pile tip restraint on the stress distribution of pile is stronger than that in refrigeration stage. The variation of pile displacement is affected by both of temperature and pile end constraint. The displacement of the upper part of the pile is greatly affected by the temperature.

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references

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