局部双层柱面网壳的形式及其稳定性分析

FORMATIONS AND STABILITY PERFORMANCES OF THE PARTIAL DOUBLE-LAYER RETICULATED CYLINDRICAL SHELLS

首先提出柱面网壳局部双层形式的形成方法与原则,给出常见局部双层形式,并分析其构造特点。采用几何非线性有限元理论,对不同网壳形式进行了深入的稳定性分析、参数分析,以及边界支承条件的影响等。本文研究结果对实际工程有重要应用价值。

In this paper, the formation procedures are first proposed for the partial double layer cylindrical shells. The commonly used forms are then developed on the basis of the orthogonal square pyramids and planar truss systems. By using the geometrically nonlinear finite element theory, the stability performances are investigated systematically. The parametric study covers wide variations of structural forms, member sections, rise to span ratios, column bay to span ratios, and boundary conditions. The results from this study could be of significant value to the design of future cylindrical reticulated shell structures.