摘要
结合工程实例,利用ANSYS有限元软件,对优化设计后的Γ形框架进行非线性屈曲分析。计算五种工况,得出重要结论:该种结构屈曲后性能不稳定,对初始缺陷敏感,跨中初始负位移有利于屈曲后承载力上升,跨中初始正位移导致屈曲后承载力急剧下降,在工程设计及安装施工中应予以足够的重视。
Combined with an engineering example, nonlinear buckling analysis was conducted for the optimized Г-shaped frame by using ANSYS finite element software. This paper calculated 5 work states to obtain important conclusions： the post-buckling of the Г-shaped frame is unstable; this kind of structure is sensitive to the initial flaws; initial negative displacement in the mid span can enhance post-buckling strength, but the initial positive one can sharply degrade it, to which enough attention should be paid during design and installation.
出处
《建筑科学》
北大核心
2007年第5期11-14,52,共5页
Building Science
关键词
Г形框架
非线性屈曲
初始缺陷
敏感性
Г-shaped Frame
nonlinear buckling
initial flaw
sensitivity
