Long-term Response of Energy Pile based on Thermo-mechanical Load-transfer Principle

罗喆; 胡彪

doi:10.13409/j.cnki.jdpme.2019.04.002

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Long-term Response of Energy Pile based on Thermo-mechanical Load-transfer Principle

更新时间：2025-12-11

- Long-term Response of Energy Pile based on Thermo-mechanical Load-transfer Principle
- Vol. 39, Issue 4, Pages: 549-555+563(2019)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2019.04.002
  CLC： U473.1
- Published：2019
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[1]罗喆,胡彪.基于热力荷载传递原理的能量桩长期响应研究[J].防灾减灾工程学报,2019,39(04):549-555+563.

罗喆, 胡彪. Long-term Response of Energy Pile based on Thermo-mechanical Load-transfer Principle[J]. 2019, 39(4): 549-555+563.
[1]罗喆,胡彪.基于热力荷载传递原理的能量桩长期响应研究[J].防灾减灾工程学报,2019,39(04):549-555+563. DOI： 10.13409/j.cnki.jdpme.2019.04.002.

罗喆, 胡彪. Long-term Response of Energy Pile based on Thermo-mechanical Load-transfer Principle[J]. 2019, 39(4): 549-555+563. DOI： 10.13409/j.cnki.jdpme.2019.04.002.

摘要

为研究能量桩的长期工作特性

通过引入Masing准则来建立桩-土荷载传递循环加卸载曲线

进而基于热力荷载传递原理来模拟循环温变荷载作用下能量桩的响应

然后基于现场原位试验

验证模型的可行性

最后研究不同冷热循环方式和桩顶荷载水平对能量桩长期响应的影响。研究结果表明:①循环温变荷载作用会使能量桩桩顶沉降和桩顶轴力不断增大

并最终趋于稳定;②相较于只提供制冷需求的能量桩循环方式

同时提供制冷制热需求的能量桩更容易引起桩顶残余沉降和残余温度应力的持续积累;③相较于桩顶轴力增量

建筑荷载的增大更容易引起桩顶残余沉降的积累。

Abstract

In order to study the long-term performance of energy piles

Masing rule was applied to build the pile-soil load-transfer cyclic curves under loading and unloading.Based on the thermomechanical load-transfer principle

the pile response under cyclic loads of temperature change was further simulated.Then

the proposed model was validated through a full scale test of energy pile.Finally

the effect of thermal cycle modes and building loads on the long-term response of energy pile was investigated.The results show that:（1）the cyclic thermal loads lead to an increasing settlement as well as a rising axial force at pile top

which eventually stabilize.（2）compared with the cycle mode of energy piles that only provide the refrigeration demand

energy piles that provide both the cooling and heating requirements could result in more residual settlement and larger residual temperature stress at pile top.（3）compared with the axial force increment at the pile top

a larger building load is more likely to cause the accumulation of residual settlement at the top of the pile.

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references

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