本文是关于核电站安全壳混凝土收缩徐变的理论分析,主要内容是在弹性蠕变体理论基础上,利用积分中值定理,在考虑了混凝土的干缩、徐变和预应力钢筋松弛的耦合作用以及建造过程对材料性质变化的影响后,推导出计算后张预应力混凝土的干缩和徐变计算公式,并在此基础上分析了安全壳预应力钢筋的长期预应力损失,这将对核电站安全壳的耐久性分析起到相当重要的作用。
This paper is concerning the theoretical analysis on concrete shrinkage and creep of the safety shell of a nuclear power plant. The main content is that, on the foundation of elastic creep theory and using the mean value theorem for integration, the formulas for cedculating the dry shrinkage and creep of the post-tensioned concrete are deduced after consid- ering the influence of the dry shrinkage, creep, the pre-stressed reinforced eonpling function of the concrete, and the material changes from constrution. And, on the basis of the above, the pre-stressed losses of the safety shell are analyzed, which will play a very imDortant role for durabilitv analvsis on the safety shell of a nuclear power plant.