摘要
针对大体积混凝土在浇筑过程中产生的水化热易致混凝土浇筑后产生表面或贯穿性裂缝的问题,基于有限元理论,利用有限元分析软件ANSYS数值模拟了大体积混凝土浇筑后的温度场变化规律。通过设置不同的外界空气温度,并逐一模拟各温度下不同风速对混凝土温度场的影响。结果表明,外界低温时,风速对大体积混凝土温度场的影响比高温时大;混凝土内外温差最大值出现在混凝土浇筑后的4~6d,因此混凝土浇筑后的保护工作重点应放在前期进行。
As a problem that cracks penetrating massive concrete after pouring because of heat of hydration, the finite element analysis software ANSYS is used to simulate the temperature field of massive concrete after pouring. By setting different outside air temperatures, the impacts of wind speed on the temperature field of concrete are simulated. The re- sults show that in the low air temperature, wind speed has a greater impact on the temperature field of the mass concrete, and the maximum temperature difference appears in 4-6 days after pouring. Thus, the protection of concrete after pouring should be done in the earlier stage.
出处
《水电能源科学》
北大核心
2015年第5期109-112,共4页
Water Resources and Power
关键词
空气温度
风速
大体积混凝土
温度场
有限元
air temperature
wind speed
massive concrete
temperature field
finite element
