Blog:Application of large-span steel structures in China

Most of the large-scale public buildings built in recent years have adopted the pipe truss structure in which steel pipe members directly meet. It has rich appearance, light structure, simple force transmission, convenient manufacture and installation, and good economic effect. structural system. For example, the pipe truss structure (column network 18m×54m) used in the second phase project (135m×174m) of Shenzhen Airport Terminal Building is one of the representative projects. The main building of Guangzhou New Baiyun Airport Terminal (325m×235m) adopts a 76.9m-span arc-shaped pipe truss structure, and its cross-section ranges from Ф508×(16-25)mm (chord) to 0244.5×7.1mm (web) and The second phase project of Xianyang Airport (52m+45m) × 234m, Nanjing International Exhibition Center (94m × 273m), Wenzhou Convention and Exhibition Center also adopted this type of structure. With my country's successful bid for the 2008 Olympic Games, another upsurge in the construction of large-span steel structures has been set off. As the main stadium of the 2008 Beijing Olympic Games, the National Stadium is composed of an inner concrete stand and an outer main body with a large-span steel structure frame, and the two parts are independent of each other. The entire outer steel structure frame adopts a two-level stress system: the first-level main force system is composed of 24 pairs of regular three-dimensional main frames similar to car spokes, and a relatively messy secondary auxiliary frame is designed between the main frames. The upper roof and walls of the National Aquatics Center adopt a steel structure, the lower structure adopts a reinforced concrete simplified shear wall-frame flat beam and a large slab system, and the upper structure is a cubic steel frame structure.