Static properties and stability of cylindrical ILTDBS reticulated mega-structure with double-layer grid substructures

Wind-Induced Response Analysis of the Cylindrical Reticulated Mega-Structures

“…The yield stress of the steel is 235MPa and the damping ratio is taken as 0.02. The fixed-hinged supports are set on the upper and lower chord joints of the main nodes along the two longitudinal edges of the main structure as described in Reference (He and Zhou [2]), and the vertical uniform loads of 1 2 kN / m are applied on the upper surface of the structure. The plan of the structure with numbering of some members is shown in Figure 1(c).…”

“…In the table, the support styles B1 and B2 denote that the fixed-hinged supports are set on the lower and upper chord joints of the main nodes along the two longitudinal edges of the main structure, respectively; B3 presents that the fixed-hinged supports are set on both the upper and lower chord joints of the main nodes along the two longitudinal sides of the main structure; B4 means that the fixed-hinged supports are set on the lower chord joints of the main nodes along the four edges of the main structure; and B5 denotes that the fixed-hinged supports are set on the upper and lower chord joints of the main nodes along the two longitudinal edges and the lower chord joints of the main nodes along the two ends of the main structure. The details of various support styles were described in our previous work (He and Zhou [2]). It can be seen that, the dynamic responses of the structure with support style B4 are somewhat smaller than those with support style B1.…”

“…However, with further increase of the span, the double-layer cylindrical reticulated structure will meet some inevitable problems, such as the instability of the whole structure since the thickness-to-span ratio is too small, the buckling of struts for the members are too long and the internal forces are too large, as well as the increasing steel consumption and the corresponding economic problems. To break the restriction of large internal forces of members and structural overall instability to construct super-long-span structure, the concept of reticulated mega-structure has been proposed (He and Zhou [2]). The whole structure is made up of two levels.…”

“…The second level is composed of substructures embedded in the large grids of the main structure, which only bears loads within the corresponding large grids and transfer them to the main structure. The structural configuration, support styles, mechanical model, static properties, and stabilities of this kind of structure have been comprehensively investigated (He and Zhou [2][3]). …”

Formation and Calculation Analyses of the Cylindrical Latticed-Built-Up-Member-System Reticulated Mega-Structure

“…The second level is the substructures embedded in the large grids of the main structure, which only bear the loads within the corresponding large grids and transfer them to the main structure. Some researches on the formation method, static properties, seismic performances, and the stabilities of the cylindrical intersecting-latticed-three-dimensional-beam-system (ILTDBS) reticulated mega-structure have been carried out comprehensively and systematically (He et al [5][6][7]). Another kind of reticulated mega-structure, cylindrical latticed-built-up-member-system reticulated mega-structure is presented and studied in this paper, including the layout method of substructures, calculation method of the latticed built-up member, and the optimization analyses of the whole structure.…”