Study On Structural Performance For Long-span Prestressed Single Layer Lattice Shell

The prestressed lattice shell is a kind of novel space structure in which the prestress cable is introduced into general lattice shell, thus the performance of the structure is improved. The structure has not only a stronger ability to span more space than the traditional lattice shells but to save more steel in same design condition. Prestressed lattice shell is a good prospect long-span structure; therefore it is of great significance to conduct an in-depth study on it. In this paper, the prestressed single-layer lattice shell of Bi Guiyuan Phoenix Hotel in Tanggu District of Tianjin was taken as a case study and the structural performance of long-span prestressed lattice shell was studied thoroughly.The method to stimulate the application of prestress reasonably is the key to numerical analysis and decides the accuracy of analysis results. In this paper, the application of prestress is stimulated in three different methods. The results of the three methods agreed very well, which verified all three methods. In order to study the effects of prestress on displacement and vibration characteristic of the structure, static and modal analysis is conducted on structures with and without prestress. The existence of prestressed cable requires special joints. The load-carrying capacity of the special joint was determined by FEM to ensure the safety of the joint. Response spectrum method and time history analysis are the most general approach for seismic design. In this paper, the structure behaviour of the prestressed single-layer lattice shell under multi-dimensional earthquake was studied by both the methods.