Table 1.

Design Considerations of truss structures.

	The 10-bar truss	The 25-bar truss	The 37-bar truss	The 60-bar truss	The 72-bar truss	The 120-bar truss	The 200-bar truss	The 942-bar truss
Design variables (
Stress constraints (σmax) in MPa	400
Density (ρ) in kg/m3	7850
Youngs modulus (E) in GPa	200
Size variables ,	[1, 1.5, 2, …,21] *1e-3 m2	[1, 1.5, 2, …,21] *1e-3 m2	[1, 1.5, 2, …,21] *1e-3 m2	[1, 1.5, 2, …,21] *1e-3 m2	[1, 1.5, 2, …,21] *1e-3 m2	[1, 1.5, 2, …,21] *1e-3 m2	[1, 1.5, 2, …,21] *1e-3 m2	[1, 1.5, 2, …,21] *1e-1 m2
Loading conditions				Case 1: Case 2: , Case 3:	Case 1: Case 2:	,		At each node: vertical loading: Section 1; Section 2; Section 3; Lateral loading: Right-hand side; Left-hand side; Lateral loading: