Study Of Cable Supported Structure System

As an effective spatial structure, the cable supported structure system is applied into the long-span building widely. The existing cable supported structure system includes mainly the cable dome, suspend-dome and beam string structure, and especially the suspend-dome and the beam string structures are applied widely. At present, the spatial structure is aiming at lighter weight and longer span, this trend demands the reduction of the structures'dead weight, one way is that the light and high strength structural materials are invented, another one is that new and more effective structural system is proposed. Under this background, it is meaningful to do deeply research on the cable supported structure system and propose new-style and effective cable supported structures.An initial prestress design method is proposed which is easy and suitable for practical project design of beam string structures; for the first time, the frequency domain method is adopted to analyze the structural response induced by wind vibration, and the research results can serve the anti-wind design of beam string structures; the static balance method is proposed which is easy, low-priced and suitable for surveying the cable's stress of beam string structures; the retractable truss string structure is put forward by combining the retractable elements and the cable supported structure, the working principle of which, retractable elements, joints and measures for construction are respectively introduced.Based on beam string structures, a new-style cable supported structure-cable supported concrete roof is put forward, the fabrication and measures for construction of which are introduced in detail, the initial prestress design method is proposed, and the research on static and dynamic characteristics of which are carried out, the final outcome can serve the practical project design of this kind of structure.A new-style cable supported structure-cable supported barrel vault is put forward by extending the truss string structure and combining the cylindrical latticed shell, and the initial prestress design method is proposed, a practical cable supported barrel vault building is taken for calculating example, the research on the static characteristics, stability, response induced by wind vibration, response induced by single support excitation and multiple supports excitation of the earthquake wave are respectively carried out in detail, the research outcomes can serve the practical application of this kind of structure. On the basis of it, the test research on the reduced scale model with a scale of 1:15 is carried out, the results indicate, the cable supported barrel vault is an effective spatial structure with enough rigidity and some geometric nonlinearity, compared with the single layer cylindrical latticed shell, the out-plane stability is improved greatly, and the horizontal thrust is reduced dramatically. Moreover, it must be considered in the design that the half-span snow load and construction load are all unfavorable for cable supported barrel vault structures. Although there are difference between test results and theory analysis, the rules keep consistent, so the theory analysis method adopted in this paper is scientific and rational.Finally, the static balance method which is used for surveying the cable's stress of the cable supported barrel vault is verified by the model test, the results indicate the method is feasible.