frp decks for movable bridges and historic vehicle bridges frp decks for movable... · frp...
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FRP Decks for Movable Bridges and Historic Vehicle Bridges
August 2019
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FRP Infrastructure
Products• Rail Platforms• Pedestrian/Vehicle
Bridges• Fender Protection
Systems• Trail/Access Bridges• Utility Products• Waterfront Solutions• Specialty Applications
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Fiber Reinforced
Polymer (FRP)
Benefits
• Long Lasting• No Maintenance
Corrosion Resistance to chemicals and water
• Size, shape• Structural properties
Design Flexibility
• Laminates are 25% weight of steel• Panels are 20% of reinforced concrete panels• Easier installation
Light Weight
• Incorporate features in shop fabrication• Accelerated construction
Prefabricated Structures
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FRP Deck Benefits
Corrosion Resistance to chemicals and water Long Lasting; No Maintenance
Light Weight for Sidewalks and Easy Installation
Prefabricated Large Structures Accelerate Construction
100% Domestic Source Material
Design and Architectural Features Molded into Structure
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FRP Market Fit• Higher initial material cost of FRP requires the right application• NOW Value is
– Installation savings using Prefabricated Bridge Elements– Light Weight
• Concrete = 4.8 kPa (100 psf)• Exodermic = 2.6 kPa (55 psf)• FRP = 0.8 to 1.25 kPa (16 to 26 psf)
– Architectural and functional design features• Best fit for FRP are bridges that must have lighter weight decking
– Movable bridges– Historic steel truss– Steel grate replacement
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Fiberglass fabrics wrap around edges
Fiberglass shear webs
Facesheet laminate
Closed cell foam
FRP Composite Sandwich Construction• Consists of fiberglass facing skins on fiberglass webs in
foam core• Design flexibility (stiffness, strength, size)• Embedded steel for concentrated loads and attachments
Facesheet Laminate
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FRP Deck Panels - Blackfriars• 33 panels• Full transverse width = 17.5 ft• Length = 6.85 ft• Crown
– 2%; not in center– Thickness 9.8 inch to 8 inch
• Ship lap joints• FRP deck at 25 psf
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FRP Deck Panels
• Depth of 7 inches• Crown• Weight is 19 psf• Wear Surface is
polymer concrete
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FRP Deck Manufacturing
Fiberglass layers in molding tool Internal core with fibers for shear
Sealed and ready for resin infusion Solid part removed from mold
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Vehicle Bridge Decks
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Rocks Village Swing Span Truss Bridge Haverhill, Mass
• Deck Size Six spans; Total of 809 feetTwo widths of 21.25 feet and 25.3 feet Deck Area18,776 square feet
• Deck Weight 19 psf• Requirements HS-25 Vehicle. L/500 deflection. • Superstructure Steel truss with longitudinal beams • Deck to Beam Connection Welded shear studs and grout• Wear Surface Polymer concrete• Guard Rail Attached to deck; side and top• Special Requirements Steel plate expansion joints at ends of all six spans.
Attached access platform. Manhole in swing span.
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Expansion Joint Panels at Swing Span
Span 4
Swing Span 3
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Installed Panels at Expansion Joint
– Very little construction tolerance for growth or shortfall
– Account for temperature during installation
– Last panel size was adjusted based on survey of installed panels
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Swing Span Operation
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Blackfrairs Bridge, London, Ontario
• Wrought iron bowstring arch-truss bridge• Rehabilitation in 2017-18
– Truss lifted from abutments; cut in half; repaired in shop
– FRP deck at 25 psf• Design
– HS-20 (75% CL 3-625-ONT)– L/500 deflection– Stringer spacing of 39 inch
• Bridge Size– 221 ft x 17.5 ft for area of 4251 sf
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Design Features – Blackfriars
• Stainless steel curb armor for snow plows
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Panel to Panel Joints
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Light Weight Installation
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Minto Bridges, Ottawa, Ontario
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FRP Deck Panels: Crown, Non-slip overlay, Ship lap joints, trench drains, curbs
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Deck Connection• Fixed connection at one
end to handle braking loads
• Clip connection in other panels for thermal expansion differences
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Embedded Steel in
Bottom of Deck Panel
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Expansion Joints
• Steel rail and gland systems• Armor ends for impact
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DesignHL-93 with L/500 deflection30 psf live load Steel stringers
Bridge Size182 ft x 31 ft for area of 5642 sf
Franklin Bridge
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• Depth of 7 inches• Weight is 23.5 psf• Wear Surface is
aluminum oxide aggregate
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Functional Features • Lift points• Drain scuppers
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Non-Slip Polymer Aggregate Overlay• Vehicle decks• Aluminum aggregate in polymer• High elongation (toughness);
great adhesion to FRP• Thickness of 3/8 to ½ inch• High traffic• Withstands snow plow blades• UV stable• Black, white or red
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FRP Products Offer Excellent Solution for Infrastructure
• Installation photos and videos• www.compositeadvantage.com• www.youtube.com/CompositeAdvantage
• For more information, contact:• [email protected]