Cantilever Bridge Course Presentation

   Cantilever bridges, also known as cantilever bridges, are a type of bridge where the main beam is directly pulled by many cables to the bridge tower. It is a combination of a pressure-bearing tower, tension-bearing cables, and a beam body that bears the bending. It can be considered a multi-span elastic support continuous beam with cables replacing the supports. This can reduce the bending moment in the beam body, lower the building height, reduce the structural weight, and save materials. The main components of a cantilever bridge are the cable tower, the main beam, and the cantilever cables.

Experimental Objective: Understanding the Transfer of Mechanics and Mechanical Equilibrium

Experimental Cognition

 Piers: Made of eco-friendly wood strips, they are highly versatile and odorless, serving as the main supporting structure of the cable-stayed bridge.

 The bridge deck is made of eco-friendly wood strips, which is highly versatile and odorless. It is the main learning support structure of the cable-stayed bridge.

Experiment steps: 1. Prepare the experiment by recognizing the experimental equipment: piers, bridge deck, and tension ropes.

Experiment Report:

The main load that a bridge bears is not the weight of the cars or trains on it, but its own weight, mainly from the main girders. The two sides of the pylon are symmetrical cable-stayed cables, which connect the pylon and the main girders together through the cable-stayed cables. Assuming there are only two cable-stayed cables on each side of the pylon, with one on the left and one on the right, symmetrically, these two cable-stayed cables are subjected to the gravity of the main girders, producing two symmetrical forces along the direction of the cable-stayed cables. According to the force analysis, the force on the left can be decomposed into a horizontal force to the left and a vertical force down; similarly, the force on the right can be decomposed into a horizontal force to the right and a vertical force down; since these two forces are symmetrical, the horizontal forces to the left and right cancel each other out, and the final gravity of the main girders becomes two vertical forces on the pylon. In this way, the force is then transmitted to the bridge piers below the pylon.

Company Profile

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