摘要
根据平截面假定推导了杆系单元和板壳单元在交界面上的约束方程,形成了混合有限元方法。利用该方法可以十分方便将整体杆系结构计算的内力作为外荷载施加到单个构件上,并对构件进行局部的受力分析。以带纵肋箱形构件为例,用混合有限元方法对该类构件进行了局部应力分析和局部板件稳定分析,总结了在混合有限元模型中板壳部分所需的长度及其合理的设置位置。
The constraint equations at the interface between beam elements and shell elements are derived and the corresponding mixed finite element method is formulated based on the plane-section assumption. The internal forces of the whole beam structures can be computed by beam element method and then conveniently applied to the members for the analysis of local stresses. A steel box member with longitudinal ribbed stiffeners is taken as an example, in which the mixed finite element method is adopted to analyze the local stresses and the local stability of panels. Conclusions are drawn on the necessary length of the member part described in shell element and its reasonable distribution in the mixed finite element model.
出处
《工程力学》
EI
CSCD
北大核心
2006年第10期163-167,共5页
Engineering Mechanics
关键词
混合有限元
钢结构
纵肋
箱形构件
稳定
mixed finite element
steel structure
longitudinal ribbed stiffener
box section member
stability
