摘要
节点刚度是影响网壳稳定性的重要因素之一,为理解其影响规律,应用Ansys的Matrix27单元,建立节点刚度单元模型,并考虑初始缺陷的影响,运用非线性有限元全过程分析方法,研究了节点刚度变化对不同缺陷短程线球面网壳稳定性的影响。结果表明:刚度降低,网壳稳定承载力下降;缺陷增大,节点刚度的影响减弱,并给出了一些工程设计的建议。
The stiffness of joints is one of the most important factors that affect the stability of single-layered reticulated shells. Taking the initial imperfection into account, the finite element model of joint stiffness is presented using finite element program Ansys and then a numerical analysis is performed on the influence of joint stiffness on the stability of geodesic single-layered reticulated shells through the geometrically nonlinear finite element method. Analysis indicated that both joint stiffness and geometrical imperfection affect the load capacity behavior of shells and some suggestions are made for structural design.
出处
《四川建筑科学研究》
北大核心
2008年第1期42-46,共5页
Sichuan Building Science
关键词
节点刚度
半刚性
缺陷
短程壳
稳定性
joint stiffness
semi-rigid
imperfection
geodesic shell
stability
