Traffic Light Poles
Figure 1 shows two single mast arm structures.
Both structures are made of circular hollow sections; structure 1 includes a stay cable. The blue arrow indicates the vertical displacement direction of the free-ends.
Does the stay cable affect the global stability?
Figure 2 shows a schematic lateral view of structure 1 and a variant with a rigid block.
| Structure 1 | Rigid block variant |
The red arrows represent forces. Assume that both structures (except for the rigid block) and loads are equal.
What are the main parameters that affect the vertical displacement of both structures?
Suppose that the traffic lights of structures 1 and 2 are carried by a portal frame, as shown in figure 3.
