Determined By The Cable Dome Shape

Cable-dome structures,composed of both cable in tension and struts in compression,are a class of flexible structrures in tensegrity,which is a reasonable and efficient structure. As a prestressed structure,the cable dome has no stiffness or loading capactity until it is prestressed. The subsquent analysis is based on Form-finding process. Some research work in our country has been conducted, but only about the Geiger system and the Levy system.In this thesis, research on four types of Cable dome has been conducted: the rectangular Geiger system, the Kiewitt system, the bird-nest cable dome and the sunflower-paterned cable dome.Cable dome with given geometry, the force density method is used for determination of stress distribution in initial equilibrium states. And the concept of the integral possible prestress is used to simplify the calculation. Considering the symmetry,a Simplified calculation method is derived,which Greatly simplify the process of solving and simplifies the process and save caculating time and computer storage space.In this thesis, the Dynamic Relaxation method is presented for determination of both initial geometry and stress distribution. Cable dome with given surface geometry, The method is also effective.The force density method and the Dynamic Relaxation method have been used for the solution of initial prestress considering dead load. They are verified both in theory and practice.Some valuable conclusions are drawn for the mechanical analysis and practical design at last, and some problems for future study are proposed.