Numerical Simulation of Thermo-mechanical Behavior of Energy Pile Subjected to Cooling-heating Cycle

杨涛; 刘律智; 花永盛

doi:10.13409/j.cnki.jdpme.2019.04.007

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Numerical Simulation of Thermo-mechanical Behavior of Energy Pile Subjected to Cooling-heating Cycle

更新时间：2025-12-11

- Numerical Simulation of Thermo-mechanical Behavior of Energy Pile Subjected to Cooling-heating Cycle
- Vol. 39, Issue 4, Pages: 585-591(2019)
- 作者机构：
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- DOI：10.13409/j.cnki.jdpme.2019.04.007
  CLC： U473.1;TU83
- Published：2019
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[1]杨涛,刘律智,花永盛.冷-热循环下能量桩热-力学特性的数值模拟[J].防灾减灾工程学报,2019,39(04):585-591.

杨涛, 刘律智, 花永盛. Numerical Simulation of Thermo-mechanical Behavior of Energy Pile Subjected to Cooling-heating Cycle[J]. 2019, 39(4): 585-591.
[1]杨涛,刘律智,花永盛.冷-热循环下能量桩热-力学特性的数值模拟[J].防灾减灾工程学报,2019,39(04):585-591. DOI： 10.13409/j.cnki.jdpme.2019.04.007.

杨涛, 刘律智, 花永盛. Numerical Simulation of Thermo-mechanical Behavior of Energy Pile Subjected to Cooling-heating Cycle[J]. 2019, 39(4): 585-591. DOI： 10.13409/j.cnki.jdpme.2019.04.007.

摘要

能量桩与地基土的热交换取决于建筑物的年能源需求

故能量桩每年受到冷-热循环作用。采用多场耦合有限元数值模拟方法

研究在力学荷载和随时间按正弦函数变化的温度荷载共同作用下悬浮能量桩的热-力学特性。结果表明

随着能量桩冷-热周期性的循环

温度荷载引起的桩身附加轴向应力、桩头附加竖向位移和桩侧附加剪应力也随时间周期性变化

且相位与温度荷载曲线的相位相同。桩升温最大时桩身轴向压应力达到最大值

桩降温最大时桩头沉降达到最大值。地基土的温度改变量随时间周期性地变化

其幅值在桩的中部深度附近最大

在桩二端深度附近较小。地基土温度的变化滞后于温度荷载。离桩越远

地基土的温度达到其最大值的时间越滞后。

Abstract

Thermal exchange between an energy pile and the surrounding soil depends on the annual energy needs of a building.Thus

energy piles will undergo a cooling-heating cycle per year.Using the coupling multi-physical finite element simulation method

the thermo-mechanical behavior of a floating energy pile under mechanical loading and sinusoidal cyclic thermal loading is investigated.The results show that with cooling-heating cycle of an energy pile

the thermallyinduced additional axial stress

the additional vertical pile head displacement and the shaft shear stress change periodically with time

and they have the same phase as thermal loading curve.The maximum axial compressive stress of an energy pile occurs when its temperature is the highest.The pile head settlement reaches its peak value when pile temperature is the lowest.The ground temperature changes periodically with time.The amplitude is the largest near the middle of the energy pile

and is smaller near the two ends of the energy pile.The variation of ground temperature lags behind the thermal loading.The longer the distance away from the energy pile

the more the time it takes for the ground temperature to reach its maximum.

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references

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悬浮能量桩热-力学基本特性的数值模拟 [J]. 杨涛,花永盛,刘律智. 防灾减灾工程学报 . 2017(04)

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