某拱形空间管桁架结构稳定性能分析  

Stability Performance Analysis of a Arched Space Tube Truss Structure

作　　者：王奥 陈东 WANG Ao;CHEN Dong(School of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China;BIM Engineering Center of Anhui Province,Hefei 230601,China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601 [2]安徽省BIM工程中心,安徽合肥230601

出　　处：《佳木斯大学学报（自然科学版）》2024年第1期106-110,共5页Journal of Jiamusi University：Natural Science Edition

基　　金：安徽省教育厅高校自然科学研究项目(KJ2021A0608)。

摘　　要：大跨空间结构常因整体稳定不足而造成严重的安全隐患,针对某实际工程中拱形空间管桁架结构采用参数化分析方法进行整体稳定性能分析研究,考虑了缺陷幅值、重要杆件以及几何参数等因素对结构稳定承载力的影响。研究表明:在不利组合工况作用下,临界荷载系数为6.03,结构稳定性较好;结构对初始缺陷不敏感,其稳定系数变化不足4%;斜腹杆局部失稳下结构仍具有较强的承载能力;考虑双重非线性效应,在一定范围内增大其宽高比和外径比可以显著提高结构稳定承载能力,并给出宽高比控制在0.5~1之间、外径比控制在0.5左右的设计建议。研究结果为此类结构的设计与施工提供了参考。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 results show that the critical load coefficient of the structure is 6.03 under the adverse combination conditions,and the structure has good stability.The structure is less affected by initial defects,and its stability coefficient changes by less than 4%.The structure still has strong bearing capacity even if the oblique bar is unstable.Considering the double nonlinear effect,increasing the aspect ratio and outside diameter 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 diameter 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 

分 类 号：TU392.3[建筑科学—结构工程]