Research On Construction Method And Simulation Analysis Of Construction Process For Suspendome Structure

Suspendome, a new kind of prestressed spatial steel structure, can cross a larger span reasonably, economically and grandly with advantages of reasonable force flow, high rigidity, low weight and simple construction. On the basis of Changzhou gymnasium, the construction method for suspendome is further studied systematically and comprehensively and the construction process for suspendome is simulated in this paper.The concept, characteristic and application for actual engineering are analyzed. Generalization about the civil present research work is made in terms of construction method related to suspendome. The necessity of construction process analysis for suspendome is definite, which is to promote the development and application for suspendome greatly.Geometrical nonlinear finite element methods are introduced, which refer to pin-jointed element, rigid-jointed beam-column element and flexible cable element. Then the content of construction process analysis is discussed. The analysis method for construction process is generalized and three prestress construction methods are presented.The elliptical suspendome structure in the project of Changzhou Gymnasium is analysed in this paper. The whole construction scheme in theory and the design of two landing-stage of scaffold in order to satisfy prestress construction are presented. The force distribution regularity of cable segment in the same hoop cable for this elliptical suspendome is researched. Through the tension-compensation method, the shape analysis is carried out, so the process to ensure the cable prestress and the forming of zero state are achieved. Through the tension-slacken method, the construction process analysis is carried out. Taking the construction sequence into consideration, the controlled prestress value in cables in the construction process can be obtained successfully. In addition the adjustment and compensation scheme for cable prestress in the construction process are presented.Finally, the research findings are summarized, which include the force distribution law of hoop cable, construction process analysis and so on. The perspective for further study are put forward with respect to the prestress construction scheme of stretching different cable segment in the same hoop and scaffold simulation in theory etc.