摘要
根据太阳辐射和气温的日变化规律,采用二维有限元方法建立了混凝土浇筑模型,仿真分析了大体积混凝土结构施工期和运行期的温度场和温度应力分布情况。结果表明,考虑太阳辐射和气温变化后,混凝土温度和应力均有明显增加,从而导致混凝土开裂的几率增大,因此在实际施工计算混凝土温度场和温度应力时应考虑太阳辐射的影响。
According to the daily variation regularity of solar radiation and temperature, the concrete pouring model is established by using two-dimensional finite element method. And then it simulates the temperature and thermal stress field distribution of the massive concrete structures during construction and operation periods. The results show that both concrete temperature and stress significantly increase when solar radiation and temperature changes is considered. Thus, the risk of concrete cracking increases. Therefore, the effects of solar radiation should be taken into consideration in the practical construction.
出处
《水电能源科学》
北大核心
2013年第5期106-108,51,共4页
Water Resources and Power
关键词
太阳辐射
大体积混凝土
温度场
温度应力
有限元
solar radiation mass concrete temperature field thermal stress finite element
