| 太阳辐射对混凝土结构温度应力的影响 |
| |
| 引用本文： | 刘虎虎,田僖,王富.太阳辐射对混凝土结构温度应力的影响[J].水电能源科学,2013,31(5):106-108,51. |
| |
| 作者姓名： | 刘虎虎 田僖 王富 |
| |
| 作者单位： | 华北电力大学 可再生能源学院， 北京 102206;华北电力大学 可再生能源学院， 北京 102206;北京送变电公司， 北京 102401 |
| |
| 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。
|
| 关 键 词： | 太阳辐射 大体积混凝土 温度场 温度应力 有限元 |
Influence of Solar Radiation on Concrete Thermal Stress during Construction |
| |
| LIU Huhu,TIAN Xi and WANG Fu.Influence of Solar Radiation on Concrete Thermal Stress during Construction[J].International Journal Hydroelectric Energy,2013,31(5):106-108,51. |
| |
| Authors: | LIU Huhu TIAN Xi and WANG Fu |
| |
| Affiliation: | School of Renewable Energy, North China Electric Power University, Beijing 102206, China;School of Renewable Energy, North China Electric Power University, Beijing 102206, China;Beijing Electric Power Transmission and Transformation Company, Beijing 102401, China |
| |
| Abstract: | 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. |
| |
| Keywords: | solar radiation mass concrete temperature field thermal stress finite element |
|
|
