Post on 12-Sep-2014
description
Steel: The Bridge Material of Choice
National Steel Bridge AllianceA division of the American Institute of Steel Construction
www.steelbridges.org
PreFabricatedSteel Bridges for
AcceleratedBridge ConstructionSteel: The Bridge Material of Choice
National Steel Bridge AllianceA division of the American Institute of Steel Construction
www.steelbridges.org
Current State of ABC Efforts In The US
• Over 800 bridges have been designed or constructed using PreFabricated Bridge Elements or Systems (PBES) in last 3 years
• PreFabricated Bridge Systems (complete bridges) have historically been steel bridges
• The use of steel PreFabricated Bridge Elements is growing fast The following slides will feature
projects utilizing steel PreFabricated Bridges or Modules
Coleman Bridge – VAcompleted in 1995
PreFabricated Bridge System
Coleman Bridge – VAcompleted in 1995
PreFabricated Bridge System
Coleman Bridge – VAcompleted in 1995
PreFabricated Bridge System
PreFabricated Bridge System
Providence River Bridge - RI
Eggners Ferry Bridge – KYemergency span replacement
PreFabricated Bridge System
800 Structural elements400 Gusset plates13000 Bolts
11 weeks from contractors Notice to Proceed to open for traffic
Eggners Ferry Bridge – KYemergency span replacement
PreFabricated Bridge System
Sam White Bridge – UTmoved with Self Propelled Modular Transporters
Complete Steel Superstructures
Wellesley – MAmoved with Self Propelled Modular Transporters
Complete Steel Superstructures
Phillipston – MAmoved with Self Propelled Modular Transporters
Complete Steel Superstructures
Gasconade River Bridge – MOlateral slide
Complete Steel Superstructures
Hyde Park – MAmoved with Self Propelled Modular Transporters over railroad tracks
Complete Steel Superstructures
I87 Arches - NY
Another Complete Steel Superstructure (?)
no – these bridges were re-decked using steel superstructure modules
Steel Superstructure Modules
new deck units for I87 Arches - NY
inversetLake Placid - NY
Steel Superstructure Modules
Lake Placid - NY
Steel Superstructure Modules
inverset
Medford, MAI93fast14 - MA
Steel Superstructure Modules
Taunton - MA
Steel Superstructure Modules
Keg Creek Bridge - IA
Steel Superstructure Modules
Uxbridge - MAfolded plate girders
Steel Superstructure Modules
Modular Steel Bridge System 1
Modular Pre-Framed Girders• Conventional fabrication• Tangent and skewed sections• Options for decking
• Concrete cast off site / near site• Precast concrete panels• Timber
• Simple or continuous spans
Modular Steel Bridge System 2
Modular Shallow Bent Plate Box Girders• Galvanized steel• Concrete deck cast off site / near site• Simple or continuous spans• Very economical
Modular Steel Bridge System 3
Orthotropic Slab Bridge for Short Spans• Long service life• Low dead load vs. concrete deck
• Ideal for re-decking existing bridges• Potential for automation of fabrication
Why Consider Modular Steel Elements?
Steel fabrication requirements are conventional• Reducing risk
Steel’s light weight• Permits re-use of existing substructure, foundation• Minimizes shipping limitations • Maximizes crane lift, reach & placement capabilities
Steel’s maximum span length / structure depth ratio• Allows structure depth limitations• Maintains existing approaches, or can increase underclearance
Steel construction can be faster• Using bolted connections
Steel is prefabricated to a high degree of accuracy• Accommodating complex geometries (skews, vertical curves)• Ensuring proper field fit-up and final roadway alignment
Steel: The Bridge Material of Choice
National Steel Bridge AllianceA division of the American Institute of Steel Construction
www.steelbridges.org
Steel: The Bridge Material of Choice
National Steel Bridge AllianceA division of the American Institute of Steel Construction
www.steelbridges.org
Steel Bridges
for
AcceleratedBridge Construction