What Is A Truss Bridge

A truss bridge (English: truss bridge) is a form of bridge. The main body of this bridge is similar to the "truss" in the house. The "truss" originally refers to the beams that support the rafters under the roof. This structure is made of short wooden beams. It is developed into a combination of strong triangles and then developed into a steel structure. When applied to the construction of a bridge, a frame will be used to support the bridge body. Generally, steel bridges with a large span are used to prevent the beam from being too deep and looking bulky. , The design method of truss bridge is often used. The longest truss bridge in the world is the Tokyo Gate Bridge built by Hitachi Shipbuilding Co., Ltd. in Japan.

These steel frame components are generally first assembled in the precast factory according to the maximum width and length allowed by transportation. After the production is completed in blocks and sections, they are transported to the construction site for assembly, and then the assembled steel beams are assembled by cranes. The structure is hung above the pier or abutment. In the early stage, the combination of the components was mostly combined with rivets. Later, the strengthening structure was replaced by high-tension bolts or welding.

advantage

Because of the use of precast components, the construction is faster than traditional concrete bridges and is suitable for use in urban areas.

Better vibration resistance

shortcoming

Most of the bridge body is made of steel, so the cost is relatively high.

It is easy to rust, so high maintenance costs are required.

Because of the thermal expansion and contraction of the metal itself, it is easily affected by temperature