What Is Bridge?
Bridge can be defined as a structure carrying a roadway, path, railway, etc. across a river, road, or other obstacle. In this article different types of bridges are discussed.
Types Of Bridges:
The most common types of bridges are described below:
- Beam Bridge
- Arch Bridge
- Cantilever Bridge
- Suspension Bridge
- Cable-stayed Bridge
- Truss Bridge.
1. Beam Bridge:
Beam bridges are the simplest bridge type normally consisting of one or more spans, supported by pier or abutment at each end. Beam bridges are usually constructed of RCC or steel or a combination of both RCC and Steel.
The concrete elements used in beam bridges may be reinforced, prestressed or post-tensioned. Types of beam bridges are girder bridges, box girder bridges, plate girder bridges etc.
2. Arch Bridge:
As the name suggests, the arch bridge consists of a curve-shaped abutment at each end. Generally, the roadway of the bridge lies on the arch structure.
The arch squeezes together and this squeezing force is carried along the curve to support each end.
The abutments then push back on the arch and prevent the arch ends from spreading apart. The span of arch bridges is normally up to 800 feet and is made of stone, steel, or concrete.
Types of arch bridge:
- Hinge-less arch bridge
- Two hinged arch bridges.
- Three hinged arch bridge
- Tied arch bridge.
3. Cantilever Bridge:
4. Suspension bridge:
In suspension bridge, the deck slab is suspended using ropes, chains, or high tensile strength steel cables.
The roadway hangs from massive steel cables, which are draped over two towers and secured by anchors on both ends of the bridge.
5. Cable-stayed Bridge:
Cable-stayed bridges are similar to suspension bridges as they also use cables but in a different form. They consist of fewer cables and the height of the towers is much greater than the suspension bridge.
6. Truss Bridge:
The superstructure of the truss bridge is constructed by using trusses which are comprised of many small elements forming triangular trusses. Truss is used because it is a very rigid structure and it can transfer the load from a single point to a much wider area.