加强型钢网壳结构的空间稳定性分析

Spatial Stability of Reinforced Steel Shell Structure

为了加强型钢网壳结构的更好应用,通过使用有限元软件ANSYS,利用弧长法对结构进行几何非线性全过程分析,得出荷载-位移曲线,分析结构的整体稳定性能,与纯单层柱面网壳进行对比;并与平面内结构稳定极限承载力对比,阐述空间分析的必要性.之后分析不同跨度下矢跨比、不对称荷载和初始缺陷各参数对结构的影响.结果表明,结构的稳定极限承载力和刚度有较大的提高.

In order to have better applications, arc length method has been used to analysis the whole process of geometry non-linear,by using the finite element analysis software ANSYS. The overall stability of this structure was analyzed through load-displacement curve,and compared with single-layer latticed cylindrical shell; and then by comparing the stable ultimately bearing capability with in-plane structure, the necessary of analyzing spatial structure was also demonstrated. After that, the effect to the stability of this structure was discussed by changing parameters such as span-ratio, asymmetry force and initial flaw with different spans.