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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。
For prestressed concrete containment structures, prestressed systems are a very important part of it. At present, more accurate simulation analysis, that is, the interaction between independent prestressed and containment models, is considered as the trend of design analysis of prestressed containment. Compared with the general structure of the prestressed system is much more complex, especially in the vicinity of large openings and prestressed tendons at the dome, the geometric characteristics of the spatial curve shape, the design has a certain degree of difficulty. The plane plan of the prestressing system is used to obtain the projection plan view and the geometric characteristics of the projection in the different coordinate planes where the prestressed steel beams are located are used to obtain the coordinate information of all the nodes and the method of establishing the three- Has a high versatility.