A new type of segmentally prestressed cylindrical reticulated mega-structure is proposed. The mechanism and detailed layout of the segmental cable-strut system are presented. The static properties and stability of the structure are analyzed and compared with those of the structure without cable-strut system. The reasonable ranges of key arrangement parameters for the segmental cable-strut system are obtained, including the rise-to-span ratio, length and distribution of the strut, and pretension degree and distribution of the cable. In addition, the effects of member buckling on the global stability of the structure and its propagation rule are investigated. On this basis, the substitution of buckling-resistant members for buckling members is proposed, and the improvement effect on the global structural stability is further discussed. The results indicate that the introduction of the segmental cable-strut system can effectively improve the static properties and stability of the reticulated mega-structure. Member buckling has a significant adverse effect on the global structural stability, and thus their interaction should be considered in the stability analysis of the structure. Member buckling initially occurs in the lower chord members near the supports in the middle of the structure, and subsequently propagates to both ends of the structure along the longitudinal direction and toward the supports along the transverse direction at the same time. Additionally, substituting buckling-resistant members for the lower chord members within about 1/6 of the arc length of each latticed arch close to supports is an effective measure for improving global stability.

提出了一种新型的分段预应力圆柱网状巨型结构。介绍了分段式电缆撑杆系统的机理和详细布局。分析了该结构的静态性能和稳定性，并将其与没有电缆支撑系统的结构进行了比较。得出分段式电缆撑杆系统关键布置参数的合理范围，包括上升跨度比，撑杆的长度和分布以及电缆的预紧度和分布。此外，研究了构件屈曲对结构整体稳定性及其传播规律的影响。在此基础上，提出用抗屈曲构件代替屈曲构件，并进一步讨论其对整体结构稳定性的改善作用。结果表明，分段式索杆系统的引入可以有效地改善网状巨型结构的静态性能和稳定性。构件屈曲会对整体结构的稳定性产生重大不利影响，因此在结构的稳定性分析中应考虑它们的相互作用。构件屈曲最初发生在结构中央的支撑附近的下弦杆构件中，随后沿着纵向方向传播到结构的两端，并同时沿着横向方向传播到支撑件。另外，在靠近支撑件的每个网状拱的弧长的大约1/6内，用抗屈曲构件代替下弦构件是改善整体稳定性的有效措施。