Conc Bridges
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Does the Cold have you thinking about the beach right now? Well….
To get to the Keys you’ll have to cross these!!
Seven Mile Bridge Seven Mile Bridge Facts: Finished: 1984 Design: Figg Engineering Contractor: Misener Marine Construction Span: 35,867 ft or about 7 miles Connects the middle keys to the lower keys Constructed with segmental concrete box girders
ASCE Study Gives Bridges on a whole a grade of C. The Percentage of Bridges being constructed with prestressed concrete is rising
http://gulliver.trb.org/publications/millennium/00019.pdf
Importance
Precast Concrete Box Girder Bridges Outline: • History & Theory • Box Girder Bridge Design • Segmental Construction Processes of Box Girder Bridges
What makes these Bridges Possible Concepts: Precast Concrete
Prestressing
Post-Tensioning
History A Tale of Two Frenchmen: Eugene Freysinnet
&
Jean Muller
Evolution of Precast Box Girder Elements What do we need to span longer distances?
Stemmed Deck Member – Double Tee
Increased Flexural Capacity! •Increased Depth •Increased Reinforcement •Prestressing •Post-Tensioning Precast Box Girder Elements allow us to do this Concrete Box Girder
Standardizing of Box Girders Specs for current designs are developed by AASHSTO and several designs can be found at: http://www.asbi-assoc.org/drawings.html
Segmental Construction Procedures
Balanced Cantilever Method
Span-by-Span Method
Progressive Span Method
Balanced Cantilever Method
Balanced Cantilever Method
Bridges using the Balanced Cantilever Method
Confederation Bridge – Northumberland Strait, Canada
Broadway Bridge – Daytona Beach, Florida
Route 895
Broadway Bridge Construction
Span by Span Method
Span-by-Span Method
C&D Canal Bridge over Delaware
Progressive Span Method Combination of Balance Cantilever and Span by Span
Progressive Span Method
Linn Cove Viaduct – Blue Ridge Parkway
Segmental Box Girders and Cable Stays
Conclusions Precast Segmental Box Grider Bridges are an economical and efficient method for building today and tomorrows bridges
To get to the Keys you’ll have to cross these!!
Seven Mile Bridge Seven Mile Bridge Facts: Finished: 1984 Design: Figg Engineering Contractor: Misener Marine Construction Span: 35,867 ft or about 7 miles Connects the middle keys to the lower keys Constructed with segmental concrete box girders
ASCE Study Gives Bridges on a whole a grade of C. The Percentage of Bridges being constructed with prestressed concrete is rising
http://gulliver.trb.org/publications/millennium/00019.pdf
Importance
Precast Concrete Box Girder Bridges Outline: • History & Theory • Box Girder Bridge Design • Segmental Construction Processes of Box Girder Bridges
What makes these Bridges Possible Concepts: Precast Concrete
Prestressing
Post-Tensioning
History A Tale of Two Frenchmen: Eugene Freysinnet
&
Jean Muller
Evolution of Precast Box Girder Elements What do we need to span longer distances?
Stemmed Deck Member – Double Tee
Increased Flexural Capacity! •Increased Depth •Increased Reinforcement •Prestressing •Post-Tensioning Precast Box Girder Elements allow us to do this Concrete Box Girder
Standardizing of Box Girders Specs for current designs are developed by AASHSTO and several designs can be found at: http://www.asbi-assoc.org/drawings.html
Segmental Construction Procedures
Balanced Cantilever Method
Span-by-Span Method
Progressive Span Method
Balanced Cantilever Method
Balanced Cantilever Method
Bridges using the Balanced Cantilever Method
Confederation Bridge – Northumberland Strait, Canada
Broadway Bridge – Daytona Beach, Florida
Route 895
Broadway Bridge Construction
Span by Span Method
Span-by-Span Method
C&D Canal Bridge over Delaware
Progressive Span Method Combination of Balance Cantilever and Span by Span
Progressive Span Method
Linn Cove Viaduct – Blue Ridge Parkway
Segmental Box Girders and Cable Stays
Conclusions Precast Segmental Box Grider Bridges are an economical and efficient method for building today and tomorrows bridges
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