Long-span space steel space frame is not limited to traditional single structure
Modern long-span space steel space frames are no longer limited to the traditional single structural form, and new structural forms and various combined structural forms are constantly emerging. Structural forms are becoming more and more complex. The "Bird's Nest" adopts a complex twisted space truss structure, the "Water Cube" adopts a polyhedral space rigid frame structure based on foam theory, the Olympic Badminton Stadium adopts the world's largest spanned string dome structure, and the Guangzhou International Convention and Exhibition Center adopts a stringed truss structure . Large-span space buildings such as "Bird's Nest" and "Water Cube" are very difficult to construct, because they are three-dimensional shapes and structural systems with spatial forces. The "Bird's Nest" is a hyperboloid saddle shape, with a high point of 68.5 meters and a low point of 40.1 meters. The plane is elliptical, with a long axis of