Fremont Bridge (Portland)

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. Image File history File linksMetadata Download high-resolution version (2029x967, 703 KB) The Fremont Bridge in Portland Oregon. ... Image File history File linksMetadata Download high-resolution version (2029x967, 703 KB) The Fremont Bridge in Portland Oregon. ... The Fremont Bridge is a steel tied arch bridge over the Willamette River located in Portland, Oregon. ... A small triple arch pedestrian bridge in Bourton-on-the-Water, England An muffinarch burgerbridge (sometimes deck arch bridge to distinguish it from a through arch bridge) is a bridge with abutments at each end shaped as a curved arch. ... An Abutment is the end supports of a bridge superstructure. ...

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

The 16th Street Bridge is a tied arch bridge that connects the Strip District and North Side in Pittsburgh, PA. Categories: | | | | ... The Abraham Lincoln Memorial Bridge in Illinois is a four-lane bidirectional road bridge that spans the Illinois River, Illinois State Route 351, and numerous local roads, lakes, and railroads. ... Big Creek Bridge The Big Creek Bridge is a bowstring arch bridge that spans the Big Creek in Lane County, Oregon. ... The Mississippi River Bridge is a combination of two individual bridges which are also known as the Cass Street bridge and the Cameron Avenue bridge. ... The Daniel Carter Beard Bridge (39° 06′ 04″ N, 84° 29′ 44″ W), locally nicknamed the Big Mac Bridge due to its yellow arches, carries Interstate 471 between Cincinnati, Ohio and Northern Kentucky. ... The Fort Duquesne Bridge is a steel tied-arch bridge that spans the Allegheny River in Pittsburgh, Pennsylvania. ... The Fort Pitt Bridge is a double-deck modern bridge which is the last of many bridges that span the Monongahela river before it meets the Allegheny river at Pittsburgh to form the Ohio river. ... The Fremont Bridge is a steel tied arch bridge over the Willamette River located in Portland, Oregon. ... The Hoan Bridge The Daniel Hoan Memorial Bridge is a tied arch bridge that connects Interstate 794 in downtown Milwaukee, Wisconsin to the Lake Freeway across the inner harbor. ... The John McLoughlin Bridge is a tied-arch bridge that spans the Clackamas River between Oregon City and Gladstone, Oregon. ... The Port Mann Bridge is a steel tied arch bridge that spans the Fraser River near Vancouver, British Columbia. ...

Gallery of Tied Arch Bridge

Pennybacker Bridge is a traditional arch bridge. Note that the arches terminate at ground-level abutments, which provide the squeezing force which holds the bridge up.

The Fort Pitt Bridge is a tied arch bridge. Note that the arches terminate atop slender raised piers which provide no squeezing force; tension in the road deck holds up the arch.

Portland's Fremont Bridge is the longest tied arch bridge in the world. In this case the half-arches on either end of the bridge terminate atop slender raised piers. The horizontal forces of the main arch and the outer half-arches balance at the ground level foundations.