Dimensions - Fall 2013 - 8
vision: innovation
Florida's first anchored end-span bridge is
that perfect blend of form and function that
the Orlando-Orange County Expressway
Authority was looking for.
Integrating Roadway
Superstructures into
Surrounding Environments
A Focus on Function, Reliability, and Aesthetics
As communities continue to expand and once rural areas
An innovative and rare bridge design that had
are connected by a vast number of roadways, structural
gained some traction in the Midwest, the anchored
aesthetics are becoming as important as reliability and
end-span bridge in Orlando is a three-span structure
functionality. Bridges and other superstructures in
with variable-depth steel plate girders of 71-feet, 286-feet,
particular offer the greatest opportunity for enhanced
and 71-feet. The bridge's intermediate bents are supported
aesthetics due to their obvious visibility and geometrical
by a substructure made up of multi-column piers, while
potential. Occasionally, this forces the designer to
a full-height concrete cantilever abutment supports the
experiment with new combinations of structural
end bents. The short end-spans and intermediate piers
components to create the perfect fit of form and function.
are bound by textured precast concrete walls that match
The Orlando-Orange County Expressway Authority
the approaching 45-foot retaining walls. Since the driven
(OOCEA) had just such a request: design an aesthetically
concrete pile foundations could not be in tension, the
pleasing bridge with a clear span of 286-feet for a high
design called for appropriately sized abutment footings that
visibility interchange location. OOCEA had just finished
offset the superstructure uplift forces with the dead load.
constructing a nearby bridge of similar length, and after
The cast-in-place concrete deck is supported by
seeing the finished product, placed a higher emphasis on
haunched steel plate I-girders that vary in height from
the aesthetics of the new bridge. Such a long single-span
nine feet at the supports to just six feet at the center. Such
bridge would typically require a very deep beam, but
a gentle taper is the aesthetic touch that allows the bridge
this would not address the client's emphasis on form
to integrate into the surrounding residential area. The
and function. Bowyer-Singleton, now Dewberry |
final bridge appearance is slender and imitates the look of
Bowyer-Singleton's (see page 9) solution was instead to
a single-span bridge.
design a structure with "anchored" end spans to offset the
significant uplift forces of the unbalanced spans.
8
Dimensions
®
http://www.dewberry.com/news/blog/13-08-22/An_Innovative_Idea_for_a_Challenging_Location
Dimensions - Fall 2013
Table of Contents for the Digital Edition of Dimensions - Fall 2013
Dimensions - Fall 2013 - Intro
Dimensions - Fall 2013 - Cover1
Dimensions - Fall 2013 - Cover2
Dimensions - Fall 2013 - 1
Dimensions - Fall 2013 - 2
Dimensions - Fall 2013 - 3
Dimensions - Fall 2013 - 4
Dimensions - Fall 2013 - 5
Dimensions - Fall 2013 - 6
Dimensions - Fall 2013 - 7
Dimensions - Fall 2013 - 8
Dimensions - Fall 2013 - 9
Dimensions - Fall 2013 - 10
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2019winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2018fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2018summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_annualreview2017
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2018winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2017fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2017summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_annualreview2016
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2017winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2016fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2016summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_annualreview2015
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2016winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2015fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2015summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_annualreview2014
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2015winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2014fall
https://www.nxtbook.com/nxtbooks/dewberry/Dewberry/dimensions_2014fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2014summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2014spring
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2014winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2013fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2013summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2012annualreview
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2013winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2012fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2012summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2011annualreview
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2012winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2011fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2011springsummer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2011winter
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2010fall
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2010summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20100102
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20091112
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20090910
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2009summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20090304
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20090102
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20081112
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20080910
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_2008summer
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20080304
https://www.nxtbook.com/nxtbooks/Dewberry/dimensions_20080102
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