新型索承网壳结构静力、稳定性分析

Stability and static analysis of cable-supported lattice shells

索承网壳是基于单层球面网壳和张拉整体体系的一种合理的新型杂交大跨空间结构.本文讨论了索承网壳的结构组成、成形过程和受力原理,并结合一个工程实例,进行非线性有限元静力分析、特征值屈曲分析、非线性屈曲分析以及有初始缺陷的非线性屈曲分析,并与同样形式的单层网壳结构进行比较,系统地研究了索承网壳的受力特性.结果表明索承网壳改善了结构的受力状态,增大了网壳结构的强度、刚度和稳定性,有着很高的结构效能,具有跨越大跨度的潜力,应用前景广阔.

Cablesupported lattice shells are a reasonable and novel type of longspan hybrid spatial structures based upon singlelayer spherical lattice shells and tensegrity systems.The component,form finding and structural principle for cablesupported lattice shells are first discussed in this paper.Then the mechanical behavior of the structure is studied systematically by combining with a real project for nonlinear finite element static analysis,eigenvalue buckling analysis,nonlinear buckling analysis and nonlinear buckling analysis with initial imperfections. The numerical results are compared with those of the corresponding singlelayer lattice shell,and it shows that the cablesupported lattice shell improves the strength,stiffness and stability of the lattice shell structure.