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张弦梁结构是大跨空间结构中的一种,由于具有优良的受力特性,张弦梁结构已在我国大型工程中得到应用,但对这种结构的设计和施工过程的理论研究还不够完善。对张弦梁结构设计和施工过程中的若干问题进行较为深入的理论研究,分析张弦梁(桁架)结构在使用阶段的静力性能,重点讨论在常见的最不利工况组合下,初始预应力幅值、矢高比与垂跨比、拱截面惯性矩(桁架截面高度)和撑杆间距及数目等参数对张弦梁结构静力性能的影响,得出一些实用性的结论供设计和施工参考。
The beam string structure is one of the large-span space structures. Due to its excellent mechanical properties, the beam string structure has been applied in large-scale projects in our country. However, the theoretical research on the design and construction of this structure is not perfect. This paper makes a deep theoretical study on some problems in the design and construction of the beam string structure, analyzes the static performance of the beam string (truss) structure in the use phase, and discusses the relationship between the initial prestress amplitude, The ratio of sag ratio to sag ratio, the moment of inertia (the cross section height of truss) and the spacing and number of strut bars on the static performance of the beam string structure are discussed. Some practical conclusions are drawn for design and construction reference.