The critics of Bridges:
A bridge is a vital factor in the field of communication. Without developed communication system,
no country can be flourished and as such in order to strengthen the economic growth, there is no alternate to develop the smooth communication system as a tentative flow. Our mother land is a land of rivers and for this reasons, in order to develop communication system with outside districts and remote hilly areas, developing and constructing bridges are important phenomena undoubtedly. Now, I would like to discus various bridges as flourished as a heritage of a symbol of socio-economic conditions of a country.
Arch Bridge:
Arch bridges are one of the oldest types of bridges and they have great natural strength. Instead of pushing straight down, the weight of an arch bridge is carried outward along the curve of the arch to the supports at each end. These supports are called the abutments to carry the load and keep the ends of the bridge. In the arch type of bridge, weight is carried outward along two paths, curving toward the ground.
Beam Bridge:
In its most basic form, a beam bridge consists of a horizontal type that is supported at each end by piers. The weight of the beam pushes straight down on the piers. The beam itself must be strong so that it doesn't bend under its own weight and the added weight of crossing traffic. When a load pushes down on the beam, the beam's top edge is pushed together which is called compression, while the bottom edge is stretched.
Suspension Bridge:
Aesthetic, light, and strong, suspension bridges can span distances from 2,000 to 7,000 feet, far longer than any other kind of bridges. They are also very expensive to build. A suspension bridge suspends the roadway from huge main cables, which extend from one end of the bridge to the other. These cables are kept on top of high towers and are secured at each end by
anchorages.
Cable-Stayed Bridge:
Cable-stayed bridges may look similar to suspensions bridges—both have roadways that hang from cables and both have towers. But the two bridges support the load of the roadway in very different ways. The difference lies in how the cables are connected to the towers. In suspension bridges, the cables ride freely across the towers,
transmitting the load to the anchorages at either end. In cable-stayed bridges, the cables are attached to the towers, which alone bear the load.