Dynamic Response Analysis of Long-Span Space Truss Structure

In recent years, space grid structure has been widely used in the roofs of large public buildings such as exhibition halls, steel plants, train platforms and so on, and has gradually become the mainstream trend because of its good mechanical performance, large overall stiffness and beautiful shape. The construction period of long-span spatial structure is long, and it is a changing process. The geometric shape, stiffness, load and constraint of the grid structure in each construction stage are different. Therefore, the mechanical properties of the grid structure in the construction process are different from that after completion, and even more complex. Especially in the construction process, the stability of the grid structure is poor. Once it encounters the action of dynamic wind load, it is very easy to have safety accidents. According to statistics, it is found that the safety accident rate of space structure in the construction process is as high as 59.5%. Therefore, the mechanical characteristics and stability of long-span space truss structure in its construction process is an important research topic.