Performance And Construction Craft Research Of Spokewise Prestressed Cable-Truss Structure

Spokewise prestressed cable-truss structure is a new type of spatial structure.which is light-duty and effective.Spokewise prestressed cable-truss structure belongs to the double-layer suspended cable structure. It is composed of external annulus,inner annulus and spokewise cable-trusses which connect the internal and external annuluses.Cable-truss is composed of bearing-cable ,stability-cable and compression (tension)bar which connects bearing-cable and stability-cable. It has superior stability and stiffness.In some projects , connecting-cable is also installed.There are two types of connection between cable and connecting-cable when analysing spokewise prestressed cable-truss structure. Usually it is treated as immovable. The author analyses the defference between the results of two-cable and three-cable cable-truss. The conclusion is as following: When the cable is fixed or slip, the tension of cable in the strcture which is only composed with bearing-cable and stability-cable is quite uniform ,but the one which has connecting-cable is opposite. This is quite defferent from the real situation.In this dissertation the author does some research on the following aspects:how the different ways of cable connection affect the performance of spokewise prestressed cable-truss structure and how the rise-span ratios, prestress and the cross stay bar affect the dynamic performance of the spokewise prestressed cable-truss structure.The prestressed double-layer suspended cable structure has been extensively applied in our country. Usually the cable is laid in one derection. The number of spokewise prestressed cable-truss structure is relatively less. There is few introduction and analysis about actual project in domestic documents. Especially to gradient elliptical spokewise prestressed cable-truss structure such as Guangzhou Zhongzhou Center prestressed vitreous canopy. There is no similar project. Combined with Guangzhou Zhongzhou Center prestressed vitreous canopy, the author does some research and analysis to the static and dynamic performance, group-cable tension craft of spokewise prestressed cable-truss structure, and also draws some summarise and suggestion to the design and construction of this kind of structure.