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一、立项背景大跨度空间管桁架结构以其优越的力学性能在体育场馆、会展中心、影剧院、大型商场、航站楼及车站等建筑中得到了广泛的应用。近年来,预应力与管桁架组合的结构体系应用也越来越多,例如哈尔滨国际会展体育中心、广州国际会展中心、全国农业展览馆等。索塔斜拉悬挑管桁架结构是预应力钢结构和管桁架结构新的组合体系,通过索塔支承管桁架梁形成大跨度空间结构,其刚度
I. Project Background Long-span space tube truss structure has been widely used in stadiums, convention centers, theaters, shopping malls, terminal buildings and railway stations with its superior mechanical properties. In recent years, the prestressed and pipe truss combination of structural systems are also more and more applications, such as Harbin International Convention and Exhibition Center, Guangzhou International Convention and Exhibition Center, the National Agricultural Exhibition Hall and so on. Pylon cable stayed cantilevered pipe truss structure is a new composite system of prestressed steel structure and pipe truss structure, which forms a large-span space structure through the support beam of the pylon, whose rigidity