三峡大学学报（自然科学版）2024，Vol.46Issue(3)：57-63,7.DOI:10.13393/j.cnki.issn.1672-948X.2024.03.009
温度与荷载联合作用下能源锚杆的热力响应特性数值模拟研究
Numerical Simulation on Thermal Response of Energy Anchor Rods under the Combined Action of Temperature and Load
摘要
Abstract
Energy anchor is a new technology of building energy saving and carbon reduction,which combines ground source heat pump technology and supporting anchor.However,the thermal response mechanism of the anchor under the influence of temperature is still unclear.Based on the multi-field coupling numerical simulation method,the effects of temperature,anchor linear expansion coefficient,anchor diameter,soil thermal conductivity and load on the thermal-mechanical characteristics of energy anchor are discussed.The results show that the displacement of the anchor head increases with the increase of the load when the anchor is pulled at room temperature.When the temperature drops by 15℃,the average displacement of the anchor head is-1.34 mm lower than that of the normal temperature anchor(about 1.0%of the anchor diameter).When the temperature rises by 15℃,the average displacement of the anchor head increases by 0.89 mm(about 0.68%of the anchor diameter)compared with the normal temperature anchor.During the heat transfer process,the increase of the anchor temperature will cause the decrease of the axial force of the anchor.Under the same heating temperature and load conditions,the displacement of the anchor head increases with the increase of the linear expansion coefficient of the anchor,and the axial force of the anchor decreases with the increase of the linear expansion coefficient of the anchor.The increase of anchor diameter will lead to the decrease of anchor head displacement.The results of test provide a certain reference and basis for the design and construction of energy anchor.关键词
能源锚杆/热力响应/数值模拟/多场耦合Key words
energy anchor/thermo-mechanical behaviour/numerical simulation/multi-field coupling分类
建筑与水利引用本文复制引用
李伟强,孔纲强,孙广超,陈玉,许晓亮..温度与荷载联合作用下能源锚杆的热力响应特性数值模拟研究[J].三峡大学学报（自然科学版）,2024,46(3):57-63,7.基金项目
国家自然科学基金青年项目(52108313) （52108313）
