Analysis Of The Wind-induced Vibration Response For Suspendome

With the development of the society, large-span spatial structures are widely used and the types become more and more various. Because of the increase of the span and the irregular shape, these types of structures are very sensitive to the wind load. Then the wind load, especially the fluctuate effect of the wind become more important in the design of the structure. As a new kind of hybrid structural system, suspendome structures are paid more and more attention to in recent years. However, the wind load design for suspendome structure system hasn't been stipulated in the existing Chinese Load Code. So it is an urgent need of proposing a kind of wind response analysis method suited for suspendome structures.The characteristics of the wind load of large-span spatial structure and the basic calculated methods are presented. Some simulation methods of wind speed are introduced. By comparison, FFT update harmony superposition method is adopted to be programmed to simulate the wind speed. Time domain analysis is performed on the roof of business communication center hall in the Baoshui district in Tianjin. The results are also compared with the single reticulated shell structure with the same parameters. Then wind-induced vibration coefficient of nodal displacement is used to evaluate the vibrating characteristics of suspendome structures. Parametric analysis of wind-induced vibration for large-span suspendome structures under different cases is also carried out. In order to consider the fluid-structure coupling effect, aerodynamic damping is introduced in the dynamic equation when calculating the wind load. The results indicate that the maximum and the mean value of wind-induced vibration coefficient of nodal displacement are all decreased because of the fluid-structure coupling.The wind response analysis method for suspendome is proved to be correct through the examples. The wind-induced vibration coefficient of nodal displacement under different cases is also calculated. Some useful conclusion is proposed and can be for the reference of practical wind-resistance design for suspendome.