摘要
针对空腹网壳结构的静力稳定性及其极限承载力问题,应用非线性有限元法进行了研究.采用特征值屈曲分析和非线性屈曲分析两种分析方式考查了空腹网壳结构的屈曲模态和失稳全过程,通过大规模的几何参数分析,计算得到了矢跨比、网壳厚度、腹杆截面等参数取不同数值时的结构极限承载力,并与单层网壳结构进行了对比.结果表明,空腹网壳结构以整体失稳为主,在用钢量相同的情况下极限承载力比单层网壳结构提高2.87倍.空腹网壳结构既具有单层网壳结构简洁美观,又有双层网壳结构的稳定性好和承载力高的优点,是一种优良的结构形式.
In view of the problems of stability and limited load carrying capacity of the vierendeel latticed shell structure, study is carried out based on nonlinear finite element method. The buckling modal and the whole course of instability are shown by two analysis method, the eigen -buckling analysis and the geometrical non- linear finite element method. Through many geometric parameters analyses, including the rise -to -span, thickness of the shell and sizes of member sections, the limited load carrying capacity is obtained by summari- zing large amount of computation data. Moreover, the comparison with the single layer lattice shell is carried out. Results show that the limited load of the vierendeel latticed shells is improved 2.87 times than that of the single layer lattice shell with the same steel consumption. Vierendeel latticed shell structure not only has the strongpoint of concision and slinky like the single layer latticed shell structure, but also has the stability and carrying capacity like double-layer latticed shell structure, therefore it is an excellent structural form in new spatial structures.
出处
《郑州大学学报（工学版）》
CAS
2008年第3期99-102,共4页
Journal of Zhengzhou University（Engineering Science）
基金
国家自然科学基金资助项目(50478079)
河南大学校自然科学基金资助项目(07YB2R035)
关键词
空腹网壳结构
几何非线性
极限承载力
单层网壳结构
the vierendeel latticed shell structure
geometrical nonlinear
limited load carrying capacity
single layer latticed shell structure
