单双层球面网壳结构的静力特性及其稳定性能分析

结合一工程实例，将单层球面网壳结构与双层抽空四角锥球面壳结构结合起来，设计了一种新型的空间结构型式，即单双层抽空四角锥球面壳结构，简要介绍了该网壳的设计过程，并采用全铰接模型分析了单双层网壳结构的承载力，应用Lanczos法求解了网壳结构的特征值及特征向量，并运用柱面弧长法跟踪了结构的非线性平衡路径，同时考虑了初始几何缺陷的影响，对比分析了两种不同支座条件的线性及非线性屈曲特征，并得出一些结论，供工程界参考。

Static Behavior and Stability Analysis of Single-Double Layer Reticulated Dome

A new type of space structure was developed by combining the single layer reticulated dome with the double layer square pyramid space grids with openings. It was desinged in the roof structure of a project.The design process was introduced briefly and the load combinations were listed .The static properties were analyzed by using a full pin jointed model and the stability of the new structure was discussed by using a rigid pin jointed model.The eigen values and eigen vectors were calculated by Lanclos method and the nonlinear equilibrium path was traced taking into account the imfluence of initial geometry imperfection by the Cylindrical Arc Length method.The linear and nonlinear buckling behaviors of two different srpporting nodes were compared and conclusions were obtained in the end of this article.