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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。
In view of the problem that the hydration heat generated during the pouring of mass concrete is prone to produce surface or penetrating cracks after the pouring of concrete, the finite element method is used to simulate the temperature field changes after mass concrete pouring by using the finite element analysis software ANSYS law. By setting different outside air temperature and simulating the effect of different wind speed on concrete temperature field one by one, The results show that when the external temperature is low, the influence of wind speed on the temperature field of mass concrete is larger than that at high temperature. The maximum temperature difference between inside and outside of concrete appears 4 ~ 6 days after concrete pouring. Therefore, the focus of protection after concrete pouring should be put in the early stage.