安全壳预应力系统三维仿真研究

对于预应力混凝土安全壳结构,预应力系统是其十分重要的一部分。目前,更精确的模拟分析,即在独立的预应力模型与安全壳模型之间采用耦合的方式考虑其相互间的作用,成为预应力安全壳设计分析的发展趋势。预应力系统相比一般结构要复杂得多,特别是大开口附近和穹顶处的预应力筋,其几何特性呈现空间曲线形状,设计具有一定难度。借助预应力系统的平面展开图,得到其投影平面图,并利用预应力钢束所在不同坐标平面内投影的几何特性,得到所有结点坐标信息,进而通过曲线拟合建立三维预应力模型的方法,具有较高的通用性。

THE STUDY OF 3D MODELING OF PRESTRESS SYSTEM OF CONTAINMENTS

For the prestressed concrete containment,the prestress system is an important part. Precisely modeling the3 D prestress tendons independently which are coupled with the concrete elements become more and more prevailingly.The prestress system of the containment is complicated,especially the part around the equipment hatch and in the dome,which makes the modeling become very difficult. By means of the developed plan of the prestress system,whose projection plan was got,and with the geometric characteristics of the different projection plans,the 3D coordinate information of every node of the tendons was also obtained,and then the nodes could be connected with curves to model the 3D prestress tendons.