河北省科技馆单层球面网壳结构的设计、施工及非线性屈曲分析

Design, Construction and Nonlinear Buckling Analysis of Single Layer Spherical Latticed Stucture Used in Science and Technology Museum of Hebei Province

本文结合一工程实例，介绍了大矢跨比开孔单层球面网壳结构的设计过程，并简要说明了该网壳的制作安装方法。同时，本文应用T.L.列式下的等截面空间直线梁单元，采用Block Lanczos方法求出了前5阶特征值；结合柱面弧长法等平衡路径跟踪技术，对网壳结构进行了考虑初始几何缺陷影响的非线性全过程屈曲分析。最后，本文得出了一些结论供相关工程参考。

In this paper, the design procedure of a single layer spherical dome with large holes and big rise-to-span ratio as an engineering project is introduced in detail with its installation method explained briefly. The supporting node and the erection node are fully described. Using the 3-D straight beam element with uniform cross section in T.L. Formulation, the eigen-buckling of this spherical dome is analyzed by Block Lanczos method and the equilibrium path is traced with regard to the initial geometric imperfection by Cylindrical Arc Length method. Some properties are discussed as well. Several conclusions are drawn with suggestions presented at the end of this paper.