Deck (bridge)

Source: Wikipedia, the free encyclopedia.
For other uses, see Bridge deck (disambiguation).
Not to be confused with Deck (ship).
The various parts of a truss bridge

A deck is the surface of a

pavement for ease of vehicle crossing. A concrete deck may be an integral part of the bridge structure (T-beam or double tee structure) or it may be supported with I-beams or steel girders
.

When a bridge deck is installed in a

through truss, it is sometimes called a floor system.[1] A suspended bridge deck will be suspended from the main structural elements on a suspension or arch bridge. On some bridges, such as a tied-arch or a cable-stayed, the deck is a primary structural element
, carrying tension or compression to support the span.

A deck bridge is one in which the deck itself is the main structural element, itself carrying the roadway. Contrast to a truss bridge which may carry a deck on the top chords or bottom chords of a structural truss.

Structural analysis

Structural engineers have several principal categories of bridge decks, for the purposes of analytic techniques. A beam deck is one where the deck and any supporting structure act together as a single beam. A grid deck uses beams and diaphragms as the supporting structure. The supporting system of a grid deck is analyzed using a grillage analysis. A slab deck is one where the deck is analyzed as a plate. If the slab has a stiffness that is different in two directions (at right angles), then the deck is known and analyzed as an orthotropic deck. A beam and slab deck is one where the beams may deflect somewhat independently, and any transverse forces are carried in the deck. A cellular deck is one where a number of thin slabs and webs will enclose cells within the deck. A boxgirder deck is one where the deck forms the top of the box girder during analysis.[2]

Railway bridge decks

An open-deck railway bridge in Leflore County, Mississippi

A

stringers or girders) is called an open deck. When the track rests upon ballast, which is then carried by the superstructure of the bridge, it is called a ballasted deck. The term direct fixation is used when the rails are anchored directly to the superstructure of the bridge.[3]

See also

References

  1. ^ Members of a Truss Bridge, by Benj. F. La Rue, Home Study Magazine, Published by the Colliery Engineer Company, Vol 3, No. 2, March 1898, pages 67-68.
  2. ISBN 9780419172604
    .
  3. ISBN 0-8493-7434-0
    .

External links

Look up deck (bridge) in Wiktionary, the free dictionary.
Look up bridge deck in Wiktionary, the free dictionary.
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