Abstract
The Beam String Structure structural system, also called BSS, has the advantages of lighter dead weight and greater flexibility. The wind load is the main design control factor. The dynamic characteristics and wind-induced displacement response of BSS are studied by the finite element method. The roof structure of the stadium roof of the Fuzhou Olympic Sports Center is the engineering background. 1)The numerical model was built by ANSYS, by shape finding, determine the initial stress state of structural members such as external cables; 2)From the analysis of dynamic characteristics, the main mode of vibration is the vibration of cables; 3)The wind speed spectrum of MATLAB generation structure is obtained by AR method, the structural response of the structure under static wind load and fluctuating wind load is calculated. From the analysis result, considering the equivalent static wind load of BSS , the design of adverse wind is not safe, and the fluctuating wind load should be taken into account.
Highlights
BSS is a new type of spatial structure, it has been applied more and more widely in recent years [1,2,3]
The reinforced concrete frame shear wall structure is adopted in the lower part of the Fuzhou Olympic Sports Center Stadium, the superstructure of the steel roof is composed of a quadrilateral ring, a string chord and a chord and a chord structure, and a plane primary and secondary truss structure, the steel wall is made of single-layer rhombus crossed grid structure
Because the BSS belongs to the overall stiffness of the structure can be determined by prestressed beam cable structure system, The geometry means of formfinding. formfinding has a great influence and dimensions of the system in the initial state are on the dynamic characteristics of the structure and the generally given by the design unit: that's the size of the wind load response[8]
Summary
BSS is a new type of spatial structure, it has been applied more and more widely in recent years [1,2,3]. The BSS shows a strong nonlinearity, and the structural design is generally controlled by stability rather than strength. The natural vibration period of the BSS is close to the predominant period of the natural wind, frequency dense, less damping, the structure more flexible, it belongs to wind sensitive structure. It is very important to consider the wind-induced vibration coefficient in the design, but the research on wind-induced vibration response of long-span BSS is less. The static wind and fluctuating wind loads on the BSS of the Fuzhou Olympic Sports Center Stadium are numerically simulated, finite element method is used to calculate and analyze, the dynamic characteristics and the structural displacement response under static wind load and fluctuating wind load are studied
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