Static Performance And Stability Analysis Of Kiewitt-Lamella Suspen-dome Structure

Suspen-dome structure is one kind of new structure system which combines single-layer shell and tensegrity system. Because of combining the advantages of single-layer shell and tensegrity system, suspen-dome has a reasonable force, and owns a bright future in the area of large span space structure.The paper proposes the following main research about Kiewitt-Lamella suspen-dome.In order to master the analysis method of using Sap2000 to analyze the static performance of suspen-dome, the author used nonlinear finite element method as theoretical basis, by using specialized finite element software Sap2000 to analyze the static performance of a typical Kiewitt-Lamella suspen-dome structure, and compared the results with the single-layer shell who has the same geometry parameters. The results revealed the characteristic of the static performance of suspen-dome and the superiority compared with single-layer shell.Then, the author did parameters analysis about Kiewitt-Lamella suspen-dome. He summed up the law that how the various parameters affect the static performance of suspen-dome by analyzing a Kiewitt-Lamella suspen-dome structure with different rise to span ratio, pole height, prestress and nodes form.After that, the author analyzed the stability of the structure. Starting from the eigenvalue analysis, the author studied on the carrying capacity and stability of suspen-dome by doing linear buckling analysis and geometric nonlinear buckling analysis. The results showed that the ultimate bearing capacity of a suspen-dome was much better than that of a single-layer shell. The author proposed suggested span ratio, pole height, prestress and nodes form of the Kiewitt-Lamella suspen-dome which was researched in this paper. The author also suggested to set a pole and radial cables under the top point of structure to solve the problem that the ultimate bearing capacity of the structure can not be maximized caused by the top point of structure failed.Finally, the author proposed the problems remained to be further researched and looked forward to the development of suspen-dome.