The Dynamic Analysis Of Cooperative Grids Composed Of Prestressed Cables And Pole Members

The worldwide development and research of prestressed space steel structures have been introduced briefly in this paper. It also discussed the superiority and prospect of prestressed space steel structure. Based on the prestressed tensegrity structure and the grids structure , a new cooperative grids composed of prestressed cables and poles has been suggested. Set out from this conception, the basic assumption and the model are built up, the method and theories of dynamic analysis are given. The natural period and response spectrum analysis are given through the finite element software SAP, and the influence of geometry non-linear condition on the dynamic analysis is considered. To find the characteristic differences between the ordinary grid and the combined grid , the natural periods of two structures are compared. We find that the natural period of every mode of combined grid is lower than the ordinary one, and the periods are so approachable. Through the dynamic analysis , we can think that the new structure is viable under 8° earthquake. The cable will be not relax.Combined the earthquake and energy dissipation research nowadays, the methods of vibration control which suit the combined grids are given in this paper. At last, this paper suggests the direction of further research, such as dynamical feature and responsibility, into cooperative grids structure .The motivation is to fine the dynamic characters of cooperative grids, which is accessed by model building up, assumption, natural period analyses and response spectrum analyses. We expect the analysis be helpful in the application of cooperative grids in practice and the engineering application.