Abstract
In this paper, the nonlinear buckling behavior of three-way double-layer cylindrical grids are persued and several characteristic features are shown compared with those of single-layer grids. The concepts of collective truss elements are introduced in formulating the stiffness matrices. The essential feature of the analysis is the separation of relative displacements from the rigid body motion. Validity and accuracy of the analytical method are shown by several examples, and it is clarified that the buckling strength of double-layer grids mainly depends on both the distance of the layers and the stiffness of strut members.
