Construction Technology of Prestressed Cable Truss System of Gymnasium in YueQing

Abstract

A cable truss support system was used in the roof of the gymnasium of YueQing sports center. It is composed by the grid structure of the monolayer surface and the cable truss support system. The prestress construction is difficult by its deformation and stress control. Based on the cable truss system of gymnasium in YueQing, construction technologies for relaxing cable, hanging cable and tension equipment are introduced. Accurate simulating calculation of the process of prestress construction is done by ANSYS. In this article, authors analyzed nonlinear features of this structure in the construction process .Cable force, deformation and steel structure stress were simulating analyzed in order to ensure the process of construction. The prestressed steel stadium used in this article is a model of prestressed cable truss system. It is made of single-layer reticulated structure and cable truss system. Its roof support system includes V-shaped columns and ring beams. Cable Truss system must add prestress to obtain a greater structural rigidity to bear loads and maintain the shape. Therefore, prestress force is also an important part of structure, besides geometric parameters, geometric topological relations and connecting nodes. 'Force' and 'Shape' of this kind of structure are unified, 'Force' is a balance on the corresponding 'Shape'. So, it's necessary to control both 'Force' and 'Shape' during the prestress construction. The cable truss system of gymnasium in Yueqing includes external radial cable (ER-x in short), internal radial cable (IR-x in short), external ring cable, internal ring cable, constructed cable and slings. All of them are made of flexible cables, connect with each other through both ends of cables and the corresponding node pins.