Long span space structures often cause serious security risks due to the lack of overall stability,the multi-parameter digital analysis method is used to analyze and study the overall stability performance of arch space tube truss structure in a practical project.The influences of initial defects,important members and geometric parameters on the stability of the structure were explored.The re-sults show that the critical load coefficient of the structure is 6.03 under the adverse combination condi-tions,and the structure has good stability.The structure is less affected by initial defects,and its sta-bility coefficient changes by less than 4％.The structure still has strong bearing capacity even if the ob-lique bar is unstable.Considering the double nonlinear effect,increasing the aspect ratio and outside di-ameter ratio within a certain range can significantly improve the stable bearing capacity of the structure.Furthermore,the design suggestions of controlling the aspect ratio between 0.5 and 1 and the outer di-ameter ratio around 0.5 are given.The research results of this paper can be applied to the design and construction of similar structures in the future.
关键词
拱形空间管桁架/稳定性能/非线性分析/影响因素
Key words
arched space tube truss/stability performance/nonlinear analysis/influencing factors
维普
万方数据