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Arch Bridges Turner Crane Arch Bridges are the oldest type of bridges after the girder bridges. There are four basic types of arch bridges: –Hinge-less.

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Presentation on theme: "Arch Bridges Turner Crane Arch Bridges are the oldest type of bridges after the girder bridges. There are four basic types of arch bridges: –Hinge-less."— Presentation transcript:

1 Arch Bridges Turner Crane Arch Bridges are the oldest type of bridges after the girder bridges. There are four basic types of arch bridges: –Hinge-less –Two-hinge –Three Hinge –Tied Arches Force is pushed out along the curve of the arch towards the abutments.

2 Hinge-less Bridge- Allows No Rotation at Foundations, Only Built at Very Sturdy Locations Because of Force Placed on the Foundations Two-Hinge Bridge- Forces generated at the hinged bearings, most commonly used type, generally the most economical Three Hinge- Contains an extra hinge at top of arch, suffers very little if movement in the foundations due to earthquakes, sinking, etc., Rarely used in recent times Tied Arches- used in places where the ground is not strong enough to support the horizontal forces, to alleviate the horizontal pressure the girder “ties” both ends of the arch together

3 Pont du Gard Built in 19 B.C. in Nimes, France Length- 273 meters Height- 49 meters Built to supplement Nimes water supply The arches were constructed of uncemented masonry Most of the aqueduct is built underground and has a slight drop of 1 in 3000 feet, by adding the drop they were able to use the natural gravitational flow and pressure systems were not needed. There are 6 arches in the lowest story, 11 in the second story and 36 in the top level.

4 URLs html PICTURES USED: –Bayonne Bridge, Bayonne Bridge, New Jersey –Tacony-Palmayra Bridge, Palmayra New Jersey –Pont du Gard –Francis Scott Key Bridge, Washington, D.C.


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