Theoretical Research On Construction Analysis Of Cable-Dome Structures Pretensioned By Different Schemes

As a kind of potential structure, Cable dome is developed following the theory of tensegrity. Cable dome is composed of struts in compression and cables in tension. The stiffness of the structure is formed by the circuit of prestress. Cable dome has made the arrangement of element more simple and also made full use of materials. At the same time, with membrane being roof material, cable dome has very low-level self-weight, so it can cover much larger span than traditional structures. Since Soul Olympic Arena took cable dome in 1988, lots of cable domes with different forms and different spans have been constructed. With the help of the information collected in these projects, great progress has been made in cable domes' designing theory and construction technology. Now, the completed cable domes are either Geiger-Form or Levy-Form. Geiger-Form cable dome has a simple element arrangement, but it's lateral stiffness is not strong enough. Levy-Form cable dome make the element arrangement as a sunflower, which will enhance the stability of the structure. Because there is no cable dome structure in main land, the research achievements pay much attention to the theory of tensegrity rather than allover-process analysis of cable dome construction. This paper will take an arena cable dome structure as an example and do allover-process designing, including prestress-calculating, construction simulation. All these data will offer creditable academic supports to the engineering.In the first chapter, the author recalls a brief history of tensegrity and cable dome by collecting lots of information, which contains the theories' forming, developing, application and research status by now. At the same time, the main works in this paper is established in this chapter.Then, the paper do some analysis in 'form-finding' of cable dome, and classify the space cable-strut systems. The calculating equations of cables and struts are deduced in this chapter. At the end of this chapter, the solution of feasible prestress distribution for cable dome is calculated following the twice-singular value resolving method, which will be used in the next chapter.In the third chapter, the author introduced the general process of cable dome construction and the analysis theory. Taking account of mechanical character, positive active element and construction process, 9 kinds of erection methods are brought forward. The principal and process of dynamic-relaxation method is introduced briefly.In the forth chapter, the construction simulation has been done by 9 kinds of erection methods. And also, all these methods are calculated by dynamic-relaxation method separately. All nodes' information and element force during different stage in all 9 kinds of erectionmethods were gotten, which can be used as a criteria to be checked during the engineering construction. All these information will prove the construction accuracy.In the fifth chapter, Matlab is introduced to manage all the data gotten in former chapter. 2-D and 3-D animated pictures are ploted to simulate the erection of cable dome directly.At last, the author summarized the works in this paper, and show the research aspects about the allover-process erection simulation of the cable dome structures.