Phyllis J. Tilley Memorial Bridge

The Phyllis J. Tilley Memorial Bridge is a pedestrian bridge in Fort Worth, Texas.

Phyllis J. Tilley Memorial Bridge
The Phyllis J. Tilley Memorial Bridge in Fort Worth, Texas
Coordinates32°44′46.1″N 97°20′58.9″W
CarriesPedestrians
CrossesTrinity River
LocaleFort Worth, Texas
Characteristics
DesignSteel Arch/stressed ribbon
Total length368 ft (112m)
Width12 ft (3.7 m)
Longest span163 ft (49.5m)
History
Construction start2011
Construction end2012
OpenedAugust 25, 2012

Description

The Phyllis J. Tilley Memorial Bridge crosses over the Trinity River connecting Trinity Park to a new trail that terminates in downtown Fort Worth.

This 368' (112m) long steel stressed ribbon/arch combination bridge is the first of its kind in North America. A steel arch with a span of 163' (49.5m) supports steel stress ribbons and precast concrete planks over the river complementing the adjacent historic Lancaster Avenue vehicular bridge. The arch spans the entire river and the steel stress ribbons rest upon the arch. The minimal sag profile of the stressed ribbons creates major tension loads which are balanced against the thrust loading in the opposite direction caused by the steel arch. The balancing of these opposing loads minimizes the required size of the foundations. Pre-fabricated concrete planks have been anchored directly to the steel stress ribbons to form the bridge walkway, eliminating the need for temporary scaffolding in the river and on the adjacent shorelines. The absence of vertical support struts reduces horizontal loads created by periodic river flooding. At night, the bridge is illuminated by a combination of white and blue LED lights.

Design and construction

The Phyllis J. Tilley Memorial Bridge was completed in 2012,[1] with Freese and Nichols as the Lead Engineering Firm and Engineer of Record. Bridge Architect Miguel Rosales of Boston-based transportation architects Rosales + Partners provided the Conceptual Design, Bridge Architecture and Aesthetic Lighting Design. The Freese Nichols / Rosales + Partners team also collaborated with structural engineers Schlaich Bergermann & Partner.[2] The contractor for the bridge project was Rebcon, Inc. of Dallas, Texas.[3] Funding for the bridge was provided by the Texas Department of Transportation, the City of Fort Worth, and local non-profit organization Streams and Valleys, Inc.

Awards
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References
  1. Civil Engineering Magazine. "New Steel Arch, Stress Ribbon Bridge Opens". Retrieved 29 April 2013.
  2. http://fwbusinesspress.com/fwbp/article/1/423/Breaking-News/Tilley-Bridge-honored.aspx
  3. Phyllis J. Tilley Memorial Bridge at Structurae
  4. "Competition History | American Institute of Steel Construction". www.aisc.org. Retrieved 2020-02-14.
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