Bridges


 * What they are?

Bridges is construction that communicates two sectors. They Are used to communicate two places are separated by rivers, sea or other geographical obstacles that warrant


 * Different types of bridges

There are four tips of bridges:

Beam bridges. This bridge is known as viaducts.

Cardenal Bridge. Spain.

Cantilever bridge. Ohnaruto Bridge. Japan

Arch bridge. China

Suspension bridge

Monterrey.


 * Characteristics

Beam bridges. They consist mainly of horizontal elements that are supported at their ends on supports or pillars. While the force is transmitted through the pillars is vertically downwards and, therefore, they are subjected to compression, beams or horizontal elements tend to bend as a result of costs incurred. The bending stress is compression at the top of the beams and traction on the bottom.

Arch bridges Are basically based on a curved section that is based up on supports or stirrups and comprising a light or empty space. Sometimes the arch is what the board supports (arch under the board) of the bridge over which is circulated through a series of auxiliary supports, while in others it is hanging the board (arch on board) by use of braces.

= Suspension bridge consist of a panel on the circuits, which hangs by a large number of straps, two large cables and overhead lines are paths that are anchored at the ends of the bridge and held by large concrete or steel towers. With the exception of the towers or large pillars supporting the supporting cables that are subject to compression, the other elements of the bridge, cables and straps are subject to tensile stresses. =


 * materials used

Materials used in bridge are: concrete, steel, wood and stone.


 * Advantages and disadvantages


 * Examples of bridges found in the world

 Eastern Scheldt project. Netherlands





 Gama bridge. Portugal 

Akashi Kaikyo Bridge, Kobe, Japan



Build Future Relationships.

The communication has become indispensable to man, currently there are many advances that enable shorter distances and with other companies to exchange culture, ideas, art, commerce, food or other, that is to be reported

The bridges are made to communicate more buildings separated by rivers, river, lake or other geographic obstacle. There are three types of bridges currently in use, bridge beams, bridge arches and cable stayed bridge. The first is characterized by a large reinforced concrete beam made is supported at its ends on stilts; the loads are transmitted vertically working in compression. The second is characterized by an arcade section that supports the board. Can be constructed of steel or reinforced concrete and the third is based in large towers that support the floor by tensioning, this type of bridge can cover large spans and are made of steel and prestressed concrete, the whole structure works under compression and traction.

The quality of the bridge is measured by its design and technology used during its construction, essentially the bridge where greater efforts are made is the suspension bridge technology, because the buckles and the masts are exposed as well to cover large spans charges should be well distributed an example of protection was used on the bridge of Normandy where Each cable (the bridge is 184 in total) consists of a set of cables with 15 mm seven chapters each. The strands are hot dip galvanized before being formed into cables and wires are then dressed in a sheath of high density polyethylene high before leaving the factory. A petroleum-based wax is used to fill the spaces between lines and between the cables and the sheath. The same protection is provided for secondary cables that connect the primary wires together. Galvanized coating performs a particular role of protection, by providing a physical barrier to prevent oxidation of steel, due to the electrochemical properties of zinc.

In conclusion, the bridges are important elements when connecting two places, using them can improve the quality of life of cities after its existence had no chance of being reported and the probability that the trade was to grow low.