西南交通大学学报2025，Vol.60Issue(3)：561-568,8.DOI:10.3969/j.issn.0258-2724.20230234
考虑杆件初弯曲的弦支穹顶结构非线性屈曲分析
Nonlinear Buckling Analysis of Suspended Domes Considering Initial Curvature of Members
摘要
Abstract
In order to reveal the influence laws of the initial curvature of members on the stability bearing capacity of suspended domes,a nonlinear buckling analysis of suspended domes was carried out by applying the multi-beam method to simulate the initial curvature of members and the random imperfection mode method to introduce the initial curvature of members with different shapes and amplitudes.The overall imperfection and the initial curvature of members were introduced to investigate the effect of the two kinds of imperfections imposed jointly on the structural stability behaviors.The results show that the mean coefficients of stability bearing capacity of suspended domes are significantly reduced when only the initial curvature of members is considered,and the maximum reduction is 33.84%,which indicates that the structure is sensitive to the initial curvature of members.Compared with the sinusoidal full-wave,the sinusoidal half-wave as the shape of initial curvature is more unfavorable to the structural stability.When the overall imperfection and the initial curvature of members are both considered,the coefficients of stability bearing capacity are further reduced for the suspended domes compared with the perfect structure,with the maximum reduction being 44.80%,but the reductions are smaller than the sums of reductions when the two kinds of imperfections are introduced separately.The joint action of the two kinds of imperfections has coupling effects on the structural stability bearing capacity,which weakens the adverse effects when the two kinds of imperfections are introduced separately to some extent.关键词
弦支穹顶结构/杆件初弯曲/整体缺陷/非线性屈曲分析Key words
suspended dome/initial curvature of member/overall imperfection/nonlinear buckling analysis分类
土木建筑引用本文复制引用
姜正荣,邱俊明,石开荣,苏昌旺..考虑杆件初弯曲的弦支穹顶结构非线性屈曲分析[J].西南交通大学学报,2025,60(3):561-568,8.基金项目
广东省现代土木工程技术重点实验室课题(2021B1212040003) （2021B1212040003）
