Bridges

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by 2019VHein
Last updated 6 years ago

Discipline:
Science
Subject:
Engineering
Grade:
4

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Bridges

Facts about bridges

The Helix Bridge

Royal Gorge Bridge

Different bridges distribute loads in different ways and are suited to different kinds of environments. Simple beam bridges can span only limited distances without extra support. Once built from wood, today they are constructed from box girders (reinforced steel tubes that are hollow inside). Arch bridges are stronger than beams and are used in places where supporting piers cannot be easily constructed; the arch may be built either above or beneath the bridge deck. Cantilever bridges consist of two beams or girders (cantilevers) stretching from the abutments that support a central beam between them. The piers are built in shallow water, but the central beam may span a deep-water channel. Suspension bridges and cable-stayed bridges are more visually attractive than cantilevers and can span much longer distances.Arch bridges are stronger than beams and are used in places where supporting piers cannot be easily constructed; the arch may be built either above or beneath the bridge deck. Cantilever bridges consist of two beams or girders (cantilevers) stretching from the abutments that support a central beam between them. The piers are built in shallow water, but the central beam may span a deep-water channel. Suspension bridges and cable-stayed bridges are more visually attractive than cantilevers and can span much longer distances. Other types of bridges include the permanently floating pontoon bridge, which can carry light traffic over water or soft ground.

The oldest bridge in the world is the Zhaozhou Bridge in China. It is a stone-segmented arch bridge. It was built in 605 A.D. It is still standing strong and is in use today.

Facts About Bridges

Simple suspension bridge


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