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弦支穹顶作为一种新型的预应力空间结构形式,凭借其高效的传力机制和优美的外形效果,已在国内外近20项实际工程中得以应用。对现有工程的跨度、上部网壳结构形式、下部张拉整体部分形式、预应力施加方式、撑杆上节点和撑杆下节点等工程进行总结。在此基础上,对结构的预应力设计方法、节点设计、预应力张拉、模型试验等内容进行分析,提出一些可供工程参考的建议。
As a new type of prestressed space structure, the chordal dome has been applied in nearly 20 practical projects home and abroad with its efficient transmission mechanism and beautiful appearance. The span of the existing project, the structure of the upper reticulated shell, the integral part of the lower part of the tension, the method of prestressing, the upper node of the strut and the lower node of the strut are summarized. On this basis, this paper analyzes the design methods of prestressed structures, the design of joints, the prestressing tension, the model test and so on, and puts forward some suggestions for engineering reference.