Tied arch bridge
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A tied arch bridge is an arch bridge in which the outward-directed horizontal forces of the arch are borne by the bridge deck, rather than the ground or the bridge foundations. The bridge deck ties the ends of the arch together, and is under tension, much like the string of a bow; therefore, this bridge design is sometimes called a bowstring arch bridge. The elimination of horizontal forces at the abutments allows a tied arch bridge to be constructed with less robust foundations; this bridge type can be easily situated on top of elevated piers or in areas of unstable soil. In addition, since they do not depend on horizontal squeezing forces for their integrity, tied arch bridges can be prefabricated offsite, and subsequently floated, hauled or lifted into place.
[edit] Bridges of this type
- 16th Street Bridge, Pittsburgh, Pennsylvania.
- Abraham Lincoln Memorial Bridge
- Big Creek Bridge, Lane County, Oregon
- Mississippi River Bridge, La Crosse, Wisconsin
- Daniel Carter Beard Bridge
- Fort Duquesne Bridge
- Fort Pitt Bridge
- Fremont Bridge, Portland, Oregon
- Hoan Bridge, Milwaukee, Wisconsin
- John McLoughlin Bridge
- Port Mann Bridge]]]] == == ==
[edit] Gallery of Tied Arch Bridge
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 Torikai ohhasi (Torikai big bridge) 鳥飼大橋 - over the Yodo river, Osaka, Japan |
