防灾减灾工程学报2017，Vol.37Issue(4)：518-524,597,8.DOI:10.13409/j.cnki.jdpme.2017.04.002
悬浮能量桩热-力学基本特性的数值模拟
Numerical Simulation of Basic Thermo-mechanical Behavior of a Floating Energy Pile
摘要
Abstract
The thermo-mechanical behavior of a floating energy pile installed in sand is investigated by the coupled multi-physical finite element method.The results show that the heating load induces the additional axial compressive stress in the pile,the negative side frictional resistance near the pile head and the uplift of the pile head.On the contrary,the cooling load induces the additional axial tensile stress in the pile,the positive side frictional resistance near the pile toe and the settlement of the pile head.For the given thermal load,the mechanical response of energy pile mainly depends on the magnitude of mechanical load on pile head.Thermally induced additional axial stress in energy pile increases firstly with increasing the mechancal load,and then keeps constant when the mechancal load is greater than a certain critical value.The temperature change in the subsoil decreases rapidly in radial direction,and the influence distance of the thermal load in the subsoil is about 20 times pile diameter from the side of the pile.Furthermore,the restraint condition on the pile head has significant effect on the thermo-mechanical response of energy pile.The larger the stiffness of the pile head,the greater the value of the thermally induced axial stress.关键词
能量桩/热-力学特性/数值模拟/温度荷载/力学荷载Key words
energy pile/thermo-mechanical behavior/numerical simulation/thermal loading/mechanical load分类
建筑与水利引用本文复制引用
杨涛,花永盛,刘律智..悬浮能量桩热-力学基本特性的数值模拟[J].防灾减灾工程学报,2017,37(4):518-524,597,8.基金项目
上海沪江基金项目(D14003)资助 （D14003）
