Effect of member layout on elastic buckling behavior for square-and-diagonal double-layer lattice domes

Abstract

Double-layer lattice structures composed of the square pattern and the diagonal pattern in top and bottom layers have the member layouts of 4 types as the arrangement of the mesh patterns as shown in figure 1. To design these lattice structures, the relationship between the member layout and the edge of plan must be decided. The mesh patterns in top and bottom layers of "large-square-on-small-diagonal" and "small-diagonal-on-large-square" have been already studied. However, the "large-diagonal-on-small-square" and "smallsquare- on-large-diagonal" of the double-layer lattice structures have not been sufficiently studied yet. Therefore, in this paper 4 types of the mesh patterns composed of the square pattern and the diagonal pattern are discussed. The effect of member layout on the buckling behavior and stress states is investigated for double layer lattice domes. The other numerical parameter is the loading conditions. In addition, the usefulness of the method to estimate the effective strength by the segment consisting of 3x3 structural units is discussed.