摘要
根据三维热传导理论,采用大型有限元软件ANSYS,考虑外界气温条件、水泥水化热等热力学参数以及分层浇注(定义单元的"生死"来准确模拟施工中的分层浇筑)对温度场的影响,运用瞬态热分析法进行温度场的仿真计算。通过计算结果与实测结果的对比分析,得出桥墩沿截面厚度方向的温度分布和其随时间变化的规律及特点,为施工提供一定的参考。
The temperature difference aroused by the heat of hydration in the process of hydration and hardening of the cement is connected with various factors such as the external atmosphere temperature condition, construction technology, mixture ratio of concrete, admixture and so on. According to three-dimension thermal conductivity theory, the largescale finite element analysis software ANSYS was employed to emulate the temperature field using transient thermal analysis method, and the thermodynamic parameter such as the external atmosphere temperature condition, the heat of hydration of the cement, and the influence of laminar pouring（ through definition of the ＂life and death＂ of the element to simulate the laminar pouring in the construction accurately） on temperature field are taken into account. Through the comparison of the calculated results with the measured results, the temperature distribution of the bridge pier along the thickness direction of the cross-section and its regularity and features changing with time are obtained,which supplies reference for the construction
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第10期73-76,共4页
Journal of Chongqing University
基金
高等学校博士学科专项科研基金资助项目(2005061102)
关键词
桥墩
水化热
温度场
有限元
pier
hydration heat
temperature field
finite element method
