The Sydney harbour bridge

1. The Sydney harbour bridge is a combination structure of:

1.1. A shell structure, because it can contain people and vehicles.

1.2. And also a frame structure, because it used a network of materials to support itself.

2. The Center of Gravity of the Sydney harbour bridge

2.1. The Center of Gravity of the Sydney harbour bridge is at the middle of the bridge (where the yellow square is).

2.1.1. The CoG (center of gravity) is important to this structure, because if we unbalanced the structure by mistake, the structure could break.

3. How external and internal forces can affect this structure

3.1. The Sydney harbour bridge can be compressed by people. This uses a pushing force.

3.1.1. It can also cause tension.

3.2. Dynamic loads, like wind, can also affect the bridge.

4. Form

4.1. The form of the Sydney harbor bridge is a through arch bridge. The through arch bridge is made from materials like steel or reinforced concrete.

5. Function

5.1. The function of the Sydney harbor bridge is to carry rails, vehicles, bicycles, and pedestrians between the Sydney central business district.

6. How can the Sydney harbour bridge support various loads

6.1. The Bridge structure is supported by four horizontal, cylinder forged steel pins in the main bearings at each end of the two arches.