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提出一种预应力巨型网格结构形式即张弦巨型网格结构,通过在巨型网格结构的横向引入预应力钢索和格构式撑杆来提高结构的横向刚度。对比分析两种结构的自振频率和若干低阶振型特征,计算研究了矢跨比、横向大网格数量、钢索的初始预应力等不同参数对张弦巨型网格结构动力特性的影响,得出了提高结构横向刚度措施的重要结论,为该结构的设计和参数选择提供参考依据。
A prestressed giant grid structure called a giant lattice lattice structure is proposed. The transverse stiffness of the structure is improved by introducing prestressed cables and lattice struts in the transverse direction of the giant grid structure. Comparing the natural frequencies and some low-order modes of the two structures, the influence of different parameters such as the ratio of sag to span, the number of large transverse grids, the initial prestressing force on the dynamic characteristics of the lattice string lattice structures is studied The conclusion of the measures to improve the lateral rigidity of the structure is obtained, which provides a reference for the design and parameter selection of the structure.