摘要
对某水电项目医院ECT加速机房大体积混凝土结构施工过程进行三维有限元分析,动态模拟环境因素随时间变化过程中不同施工阶段混凝土结构温度场和应力场分布规律。分析结果表明,混凝土浇筑初期温度呈现内高外低的规律,随着龄期的增加,水化热经由热传导和热对流逐渐向周围扩散,温度场趋于稳定。高温度应力出现在混凝土浇筑块温度场分布较高区域和受外部约束区域,并导致混凝土出现裂缝。
The construction process of a mass concrete structure for the ECT accelerator room of a hospital in a hydropower project is analyzed by using 3-D Finite Element Method, which dynamically simulates the distributions of temperature and stress fields in different environmental factors and different construction stages. The analysis results show that the temperature presents the law that is high in internal and low in external at the beginning of concrete placement, and the hydration heat gradually spreads to surrounding by heat conduction and convection with the increasing of concrete age and then the temperature field becomes stable. High temperature stress leads to cracking in concrete, which appearing in the place of high temperature and external constraints.
出处
《水力发电》
北大核心
2014年第2期65-67,共3页
Water Power
关键词
大体积混凝土结构
水化热
温度场
应力场
mass concrete structure
hydration heat
temperature field
stress field
