In Plane Stability And Design Method Of Arched Pipe Truss Structure

With the development strategy of "One Belt and One Road" proposed,it indicates that China's construction industry will have tremendous business opportunities.In recent years,the production of steel in the quality and yield have made great progress.Thus,the arched pipe truss structure has been widely used in large-span buildings,such as railway stations,airport terminals,stadiums,convention centers and other large public buildings.Therefore,the problem of arched pipe truss structure attracts more and more attention.A set of finite element models with a sag ratio of 0.2 are set up in this paper.The eigenvalue buckling analysis and nonlinear buckling analysis are respectively carried out.The results obtained by the two methods are compared and analyzed.It is found that there are some differences between the results of buckling analysis and eigenvalue buckling analysis of the arch truss structure.To ensure the safety of the structure during the analysis,the method of nonlinear buckling analysis is more suitable for the stress of the structure in practical engineering Happening.Through the deformation of the structure after deformation and displacement load curve,the instability failure mechanism in the plane of the arch pipe truss structure is obtained,paving the way for the subsequent research.Since then,the models with the ratio of longitudinal span of 0.1,0.3 and 0.4,which are commonly used in engineering,have been established to study the influence of different parameters on the ultimate bearing capacity of arch-pipe truss.Under the condition of keepingother conditions unchanged,the influences of the ratio of sag-span,the connection form of chord and web,the diameter and thickness of chord web,the aspect ratio and the high-span ratio on the ultimate bearing capacity of four structures were studied respectively The structure of the bearing capacity in different parameters under the shadow of the law.Finally,the above research work is summarized,and some suggestions to guide such engineering design work are put forward,which provides the basis for the research and application of arched pipe truss structure.