摘要
为研究混凝土体的温度和湿度变形及开裂,根据多相体系非连续介质中的热质耦合传导理论对混凝土的热湿状态和耦合传导进行了研究。应用简化的热湿耦合方程,提出对混凝土中温度场和湿度场进行数值计算的方法,并根据多孔介质微观物理模型和利用测量混凝土内湿度的简便方法提供数据来确定计算格式中的质扩散系数和热质扩散系数。计算结果与实验结果吻合良好。这说明该算法可用于碾压混凝土拱坝表面和堆石面板坝的结构设计。
The heat and moisture transfer in concrete was analyzed based on the theory of heat and mass transfer in multiphase discontinuous media to calculate the temperature and moisture distrabution and thier effects on cracks. The formulation was based on a microscopic analysis of the physical mechanics. The mass diffusivity and the thermal-mass diffusivity in the coupled equations were measured experimentally. The computational results demonstrate the effectiveness of the method which can be used to design rolling compacted concrete (RCC) dams and concrete face rockfill dams.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第12期1653-1655,1671,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家教育振兴计划项目
关键词
混凝土坝
温度
湿度传导
仿真计算
concrete dams
temperature
moisture transport
simulation calculation
