What is prestressed concrete girder bridge?

Prestressed concrete is a structural material that allows for predetermined engineering stresses to be placed in members to counteract the stresses of loads. These prestressed concrete girder bridges are currently used in bridge construction all over the world.

Why is prestressed concrete used on bridges?

A properly engineered prestressed-concrete beam can span longer distances than a reinforced-concrete beam and it is thinner, lighter in weight, and uses less concrete without cracking or breaking.

What is concrete girder?

(gûr′dər) A beam, as of steel, wood, or reinforced concrete, used as a main horizontal support in a building or bridge.

What is precast concrete girders?

Concrete girders are generally precast and prestressed for bridges, while they are mostly reinforced concrete in buildings.

What is pre-stressed concrete?

Pre-stressed concrete is a form of concrete where initial compression is given in the concrete before applying the external load so that stress from external loads are counteracted in the desired way during the service period. This initial compression is introduced by high strength steel wire…

What does prestressed concrete mean?

Prestressed concrete is a form of concrete used in construction that, while under construction, is substantially “prestressed” (compressed) in the areas which will be subjected to tensile forces while in service to strengthen it against said forces.

How many types of prestressed concrete are there?

According to the construction method, there are two kinds of prestressed concrete: Pre-tensioned concrete; Bonded Post-tensioned concrete. Unbonded Post-tensioned concrete; Pre-tensioned Concrete. In this method, wires or tendons are tensioned at first and concrete is poured later. It creates a good bondage between the tendon and concrete.

What is stressed concrete?

Prestressed concrete is concrete that has had internal stresses introduced to counteract, to the degree desired, the tensile stresses that will be imposed in service. The stress is usually imposed by tendons of individual hard-drawn wires, cables of hard-drawn wires, or bars of high strength alloy steel.