Analysis Research Of Tensile Ring-shaped And Internal Suspended Top Structure

In these years,people need the larger stadiums and aecodromes as the quick development of sports undertaking and aviation undertaking,which promotes spatial structures developing toward the larger?economicer and aetheticer neotype structure forms and Tensegrity structure is high efficiency structure System under the tendency of the development.Many national architects and structural researchers are researching extensively the tensegrity structures since they were natal.Theoretical research and engineering experience of tensegrity structure system have had a very large development in the United States?France?Japan?South Korea?Mexico, Taiwan and so on. Internal researchers began to reseach and searched the tensegrity structure system from 1990's,but reseaches still stay in the stage of structural calculation and methods.The reseaches about dynamical peculiarity, seismic response?wind vibrating response and the engineering experience are almost blanking.So the work of this paper feels about analysis of the tensile ring-shaped and internal suspended top structure.Firstly,on the basis of wide-range reading of relevant internal and foreign documentation datums and degree dissertations about the tensegrity structures written by Chinese doctors,this paper looks back and summarize systematically developed history, researching present status and the application about engineering experience of the tensegrity structure.This paper also summarizes conception?shape?structural characteristics and advantages and finishes the conceptual reseach about the tensegrity structure.The finite element equation of of the tensegrity structure is established and the stiffness matrix of two-node cable element is deduced in this paper. The same time distinguishment between the cable element and link cable and the choice about solving means of nonlinear system of equations are introduced.Secondary,a new style tensile ring-shaped and internal suspended top structure is made and expounded firstly by my tutor in accordance with the thought of tensegrity structure system in this paper.The paper also introduces structural characteristics and making-up forms of the top structure.Initial stress state and work state of the top structure are calculated by use of ANSYS analysing software.It also researches the static characteristics about flowing direction of internal force and displacement of the top structure under the action of vertical loads and knows about internal force distribution and joints displacement of the construction members.The influence on the structural static characteristics under different parameters(these parameters include spatial geometric shape?compression bar height?prestressing force?vertical loads and so on)and the changing condition of internal force and joints displacement under these parameters are researched and analysed.Subsequently,finite elemnet analysis of autooscillation characteristics of the top structure is analysed by use of structural dynamic theory and subspace method.Structural frequency?corresponding vibration shapes?stiffness distribution and basic autooscillation characteristics of the top structure are ascertained and grasped.The influence on structural autooscillation characteristics of different parameters(these parameters include prestressing force?body system mass?area of cable section and tatio of rise to span)and change condition of frequency and corresponding vibration shapes are researched and analysed.Then, shock-resistant capability of the top structure is researched by use of the spatial multi earthquake modal response spectrum theory.Dynamic internal force distribution of the construction members? the influence on structural autooscillation characteristics of different parameters(these parameters include modal combinatorial number?load intensity? earthquake dimensions?area of cable section?prestressing force and combinatorial method)and change condition of internal dynamic force and dynamic displacement under these parameters are analysed and discussed.We have a overall acquaintance about...