| The mechanism of the spoke double-layer cable structure is similar to the bicycle wheel,which is a new long-span space structure composed of inner and outer rings connected by cables,and the whole structure is in the state of self-balancing stress.The structural system has fewer joints,light deadweight,large span,simple and quick construction,novel and beautiful shape,and is widely used in sports buildings.As the main stadium of the 2023 Asian Cup,Dalian Barracuda Bay Professional Football Stadium is not only used to host the top international matches,but also an important place for sports and sports activities,national fitness and tourism after the match.In this paper,based on the construction of the football field,the mechanical properties and construction forming process of the two-layer cable-frame structure with spokes are studied from the point of view of design by using the method of numerical simulation,so as to provide a reference for the construction of the actual project.This article first reviewed the hub-and-spoke cable system of the structure of the development process,structure features and examples of engineering application at home and abroad to analyze the research status at home and abroad,including forming in analysis,mechanical property,construction research.Secondly,according to the structural characteristics of the background engineering,five kinds of wheel-spoke double-layer cable structure schemes are selected,and the type selection is analyzed.The static performance of the structure is explored,the static response of the structure under full span and half span loads is analyzed,and the internal force and displacement characteristics of the structure under different loads are obtained.The static instability mode is adopted to consider the initial defect distribution of the structure,and the overall stability performance of the structure is determined.The natural vibration characteristics and seismic performance of the structure are analyzed,and the dynamic characteristics of each structure scheme are obtained.The influence of local cable break in different positions and at different times on the anti-collapse performance of spoke double-layer cable system was investigated.The response of each structure scheme is compared from the above four aspects,and the structure scheme with the best comprehensive performance is selected.Thirdly through parametric analysis of the structure of comprehensive performance best solution were studied,and the influence of the prestress level of the cable,the size of the member section,the height of the inner ring and the restraint conditions of the support on the static performance and natural vibration characteristics of the double-layer structure was analyzed.The change law of structural response is out,and the spoke cable structure is further optimized,reducing the amount of steel used,reducing engineering costs,and improving economy.Finally,the key nodes of the spoke double-layer cable system and the construction forming process are studied,and the structural support nodes and the inner and outer ring anchor nodes of the cables are analyzed and checked to ensure the safety and effectiveness of the nodes.Analyzed the difficult problems in construction,formulated three construction tensioning plans,and simulated the construction process by using the forward analysis method.Through the analysis of the development process of the cable force,the selection of the tensioning equipment,and the operability of the construction,compared the advantages and disadvantages of each construction plan,and provided a theoretical basis for the tension construction of the Dalian Barracuda Bay professional football field. |
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