The Analysis On Optimal Design And Dynamic Characteristic Of Plane String Strucrure

Plane String Structure, with struts connecting flexural and compression structural members and tensile members, is a developing structure form which fully utilizes the mechanic properties of arches and cables. It has been applied in variable domestic and oversea project these years. The Plane String Structure is becoming one of the state-of-the-art researches because of its successful applications in many important long-span buildings. In this thesis, optimal design of the Plane String Structure under static load and time history analysis under seismic load were carried out.Basing on the model of Jining Stadium string structure, first compared the advantages and disadvantages of grids, truss, and string structure. Then using the finite element theory to analyze the Plane String Structure, Design model of one-way string srructures, and analyses static behaviors of Plane String Structure by ANSYS. Analysis of the number of struts, ratio of the height of the arch,ratio of the height of the string and the span,and the stress of string, the four factors on the structural static performance. Studies have shown that:the number of the strut, ratio of the height of the arch and the span,ratio of the height of the string and the span do a greater impact on the structure of the force.Analyzed the dynamic properties of the Plane String Structure, the analysis on dynamic property of Plane String Structure shows that the cable plane stiffness outside the plane is weak,and the vertical stiffness of the overall structure is weak, ratio of the height of the arch and the span,ratio of the height of the string and the span do a greater impact. The analysis of frequency had been given out. At the same time, this paper mainly considered the influence of the number of struts, ratio of the height of the arch and the span,ratio of the height of the string and the span and the prestress in cable on thestructural seismic response by using time history analysis method. Studies indicate that V-shaped struts arranged under the bottom chord, can significantly improve the stiffness of the structure; ratio of the height of the arch and the span,ratio of the height of the string and the span do a greater impact on the on the structural stiffness and seismic response; lower chord cable prestressed value of structural seismic dynamic response to impact is not obvious.